USF1

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USF1
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 1AN4
Identifiers
Aliases	USF1 , FCHL, FCHL1, HYPLIP1, MLTF, MLTFI, UEF, bHLHb11, upstream transcription factor 1
External IDs	OMIM: 191523; MGI: 99542; HomoloGene: 31426; GeneCards: USF1; OMA:USF1 - orthologs
Gene location (Human) Chr. Chromosome 1 (human) [1] Band 1q23.3 Start 161,039,251 bp [1] End 161,045,977 bp [1]
Gene location (Mouse) Chr. Chromosome 1 (mouse) [2] Band 1 H3|1 79.4 cM Start 171,238,881 bp [2] End 171,246,710 bp [2]
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in monocyte right lung upper lobe of left lung appendix spleen bone marrow cells ganglionic eminence right lobe of liver body of stomach anterior pituitary Top expressed in urethra superior frontal gyrus lip yolk sac morula male urethra neural tube lamina propria of urinary bladder thymus ganglionic eminence More reference expression data BioGPS n/a
Gene ontology Molecular function DNA binding protein dimerization activity DNA-binding transcription factor activity histone deacetylase binding bHLH transcription factor binding protein binding protein heterodimerization activity enzyme binding double-stranded DNA binding protein kinase binding protein homodimerization activity transcription factor activity, RNA polymerase II distal enhancer sequence-specific binding sequence-specific DNA binding identical protein binding DNA-binding transcription factor activity, RNA polymerase II-specific protein-containing complex binding Cellular component transcription regulator complex nucleus NURF complex Set1C/COMPASS complex nucleoplasm Biological process carbon catabolite regulation of transcription negative regulation of fibrinolysis response to hypoxia regulation of transcription, DNA-templated glucose homeostasis regulation of transcription by RNA polymerase II late viral transcription transcription by RNA polymerase II transcription, DNA-templated positive regulation of transcription, DNA-templated regulation of transcription from RNA polymerase II promoter by glucose glucose metabolic process cellular response to insulin stimulus positive regulation of transcription by RNA polymerase II positive regulation of transcription from RNA polymerase II promoter by glucose lipid homeostasis response to UV Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 7391 22278 Ensembl ENSG00000158773 ENSMUSG00000026641 UniProt P22415 Q61069 RefSeq (mRNA) NM_207005 NM_001276373 NM_007122 NM_009480 NM_001305676 NM_001305677 NM_001305678 RefSeq (protein) NP_001263302 NP_009053 NP_996888 NP_001292605 NP_001292606 NP_001292607 NP_033506 Location (UCSC) Chr 1: 161.04 – 161.05 Mb Chr 1: 171.24 – 171.25 Mb PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

Upstream stimulatory factor 1 is a protein that in humans is encoded by the USF1 gene. ^{[5] [6]}

Gene

Representative illustration of bHLH motif binding to the consensus sequence on DNA

The upstream stimulatory factor gene encodes a transcription factor USF that belongs to the proto-oncogene MYC family and is featured by a basic helix-loop-helix leucine zipper (bHLH-LZ) motif in the protein structure. ^[7] USF was originally identified to regulate the major late promoters of adenovirus, and recent research has further revealed its role in tissue protection. ^[7] The bHLH-LZ motif enables the transactivation capacity of the USF protein through interacting with the Initiator element (Inr) and E-box motif on the bound DNA. ^{[7] [8]} In the context of insulin and glucose-induced USF activities, those E-box motifs can act as a glucose-responsive element (GRE) and a part of the carbohydrate response element (ChoRE) to interact with transcription factors. ^[8]

Isoforms

USF comprises two major isoforms: USF1 and USF2. USF1 gene locates on the chromosome region 1q22-q23 in both human and mice; USF2 gene locates on the chromosome 19q13 in human and chromosome 19q7 in mice, respectively. ^[9] Both USF1 and USF2 transcripts comprise 10 exons and can undergo exon 4-excision during alternative splicing. ^{[7] [9]} From an auto-regulation perspective, these exon 4-excision products act as dominant negative regulators and are found to suppress USF-dependent gene expression. ^{[7] [9]}

Protein

Comparison between USF1 and USF2 in transcripts and protein function

Although USF1 and USF2 share 70% of the amino acid sequence in their bHLH-LZ region, only 40% of similarity is found in their full-length proteins. In addition, USF1 and USF2 exhibit different protein abundances in a cell type-specific manner. ^[7] It has been found that USF1 and USF2 expression increases during the differentiation of erythroid cells. ^[10] Despite the ubiquitous expression of both isoforms, USF1 and USF2 mediate different biological processes and functions in cells. While USF1 modulates metabolism, immune response, and tissue protection, USF2 primarily controls embryonic development, brain function, iron metabolism, and fertility. ^[7] Structurally, the highly conserved bHLH-LZ structure on the C-terminus of USF yields high binding specificity and promotes the formation of USF1 homodimers or USF1-USF2 heterodimers for DNA binding. ^{[7] [9] [11]} The USF-specific region (USR) on the N-terminal region, on the other hand, facilitates the nuclear translocation and activation of USF1.

Function

This gene encodes a member of the basic helix-loop-helix leucine zipper family and can function as a cellular transcription factor. The encoded protein can activate transcription through pyrimidine-rich initiator (Inr) elements and E-box motifs. This gene has been linked to familial combined hyperlipidemia (FCHL). Two transcript variants encoding distinct isoforms have been identified for this gene. ^[6]

A study of mice suggested reduced USF1 levels increase metabolism in brown fat. ^[12]

Regulation

Modulation of DNA binding affinity

The symmetrical E-box motif is the main target of bHLH-LZ transcription factors, and USF1 has a high binding affinity for the core sequence CACGTG in the motif. ^[9] USF1-DNA binding activity can be modulated by cell type-specific DNA methylation and acetylation on the E-box motif or by post-transcriptional modifications of the USF1 protein. For example, CpG methylation on the central E-box motif inhibits the complex formation of USF1 with its co-transcription factors and therefore decreases the corresponding gene expression in mouse lymphosarcoma cells. ^[9] In contrast, phosphorylation of USF1 by p38 mitogen-activated protein kinases, protein kinase A or protein kinase C increases its binding to the E-box motif and activate gene transcription. ^[9]

Phosphorylation

Mitogen-activated protein kinase (MAPKs) phosphorylates serine and threonine residues of substrate proteins and convert extracellular signals induced by growth factors, mitogens or cytokines into intracellular phosphorylation cascades, which regulate cell proliferation, differentiation, stress responses and apoptosis (programmed cell death). ^[7]

ERK and JNK signaling cascades

Phosphorylation by MAPKs induces a conformational change of the USF protein and exposes its DNA-binding domain for interaction. This increased structural exposure enhances DNA binding and therefore the transcriptional activity of USF. ^[13]

• ERK1 (also known as MAPK3) and ERK2 (also known as MAPK1) phosphorylate USF1 in response to TFG-β signaling in vascular smooth muscle cells. ^[13] SMAD2 and SMAD3 signaling following the TFG-β receptor activation can also cooperate with EGFR / ERK pathways to activate USF1, which in turn regulates the gene expression of plasminogen activator inhibitor-1 (PAI-1), a significant biomarker and predictor of cardiovascular disease-related death ^[13] and a marker of poor prognosis in breast cancer. ^[7]
• Casein kinase 2 or CK-II (CK2) is a tetrameric enzyme composed of two catalytic and two regulatory subunits. In pancreatic cells, CK2 phosphorylates USF1, PDX1 and MST1 to suppress insulin expression. ^[14]

Summary of USF1 modifications

	Proteins mediating USF1 modification
Phosphorylation	p38, pKA and pKC, [9] ERK1/2, [13] DNA-PK [11]
Acetylation	PCAF [11]
Methylation'	SET7/92 [9]
	USF1-interacting proteins
Transcription co-factors	USF2, [7] SP1, PEA3, MTF1, [9] SREBP1-c, [11] MED17, [15] BAF60 [15]

Gene transcription

• Transforming growth factor β 1 (TGF beta 1) is encoded by the TFGB1 gene that contains an E-box within the promoter region and has been implicated in excessive extracellular matrix accumulation under a high-glucose condition. ^[8] Overexpression of either USF1 or USF2 is found to elevate the TFGB1 promoter activity in human embryonic kidney cells. However, only USF1 overexpression leads to increased TGF-β1 secretion.
• Thrombospondin 1 (TSP1) is involved in the development of diabetic nephropathy. USF1/2 binds to the E-box motif (CAGATG) on the human THBS1 promoter and regulates high-glucose-induced TSP1 expression in mesangial cells. ^[8] USF2 overexpression has been found to augment THBS1 promoter activity and TSP1 expression. The resulting increase in TSP1 expression further promotes the formation of active TGF-β. ^[8]
• AP-1 transcription factor (AP-1) refers to a complex of dimeric transcription factors composed of c-Jun, c-Fos or activating transcription

  

  cJun-cFos heterodimer binding to DNA (red)

  factor (ATF) that bind to the AP-1 binding site on DNA. ^[16] cJun-cJun / cJun-cFos dimers preferentially bind to the phorbol 12-O-Tetradecanoylphorbol-13-acetate (TPA)-responsive element (TRE region, TGACTCA), whereas cJun-ATF dimers and ATF homodimers preferentially bind to the cAMP-responsive element (CRE, TGACGTCA). ^[16] The AP-1 complex becomes activated in response to high glucose, oxidative stress, low-density lipoprotein(LDL) and oxidised LDL. It has been reported that a high glucose level upregulates USF and AP-1 binding activities, as well as the protein level of cFos. ^[8]

Interaction between USF1 and other transcription factors, including SP1, PEA3 (also known as ETV4) and MTF1, also leads to cooperative transcriptional regulation. For instance, the leucine zipper motif of USF1 recruits PEA3 to form a ternary complex and co-regulates the transcription of BAX, an apoptosis regulator. ^[9] Another USF1-regulated target is topoisomerase III (hTOP3⍺), which catalyzes the topological changes of DNA, modifies DNA supercoil structures, and increases the chromatin accessibility for gene expression. ^[9] Similar interactions exist between USF1 and JMJD1C or H3K9 demethylase, in which the molecular interactions change chromatin accessibility and elevate the transcription of a series of lipogenic genes, including FASN , ACC, ACLY, and SREBP1. ^[15]

Chromosome boundary by USF

General model for duplication of heterochromatin during cell division

Chromosomes are generally classified into euchromatin and heterochromatin with distinct histone modifications, compaction levels, and the resulting gene expression patterns. Heterochromatin is a tightly condensed and transcriptionally repressed chromatin domain that is characterized by distinct combinations of histone post-translational modifications. ^[17] Heterochromatin is required for genome stability and gene expression regulation. However, it can spread into neighboring DNA regions and inactivate gene expression. ^{[17] [18]} Chromosome boundary elements are thus necessary to block such stochastic spreads of heterochromatin and maintain stable gene expression. ^[19] USF1 and USF2 have been found to recruit various histone-modifying complexes, including the histone H3 methyltransferase Set1 complex and the H4 arginine 3 methyltransferase PRMT1, with the latter known to establish active chromatin domains. ^[19] USF1/USF2 binding deposits a high level of activating histone modifications on adjacent nucleosomes and thus prevents the propagation of chromatin silencing modifications from the heterochromatin, such as H3K9 and K27 methylation. ^[19]

DNA histone modifications

Other USF1/USF2-related chromatin modifications include the recruitment of the E3 ubiquitin ligase, RNF20, to moniubiquitinate histone H2B. ^[19] The loss of RNF20 is found to cause an extension of the silencing modifications from the 16 kb heterochromatic domain into the β-globin locus. ^[19] Moreover, USF1 and USF2 can bind to the 5' DNase I hypersensitive site HS4 and recruit an H3 acetyltransferase, PCAF, which blocks the heterochromatin spread into the β-globin locus. ^[18]

FASN transactivates for lipogenesis

Fatty acid metabolism

USF is known to bind the L-type pyruvate kinase promoter on DNA at high glucose and insulin levels. Excessive insulin activates kinases and phosphatases that post-translationally modify USF, sterol regulatory element-binding protein 1C (SREBP1C), Carbohydrate-responsive element-binding protein (ChREBP), and Liver X receptor (LXRs). ^[11] With insulin stimulation, USF1 and USF2 bind to the E-boxes at -332 and -65 in the promoter region of FASN that encodes Fatty acid synthase (FAS) for lipogenesis. ^[11]

Various post-translational modifications of USF1 determine its activity and signaling pathways and can affect the lipogenesis process. An abnormal increase in the USF-mediated de novo fatty acid synthesis is found to cause intracellular fatty acid accumulation and deregulate gene expression and cellular processes like tumor cell survival. ^[20]

Lipogenic pathways

• In response to insulin elevation, DNA-protein kinase (DNA-PK) involved in DNA damage repair becomes dephosphorylated and activated. ^[11] The active form of DNA-PK indirectly phosphorylates USF1 at S262 through AMP-activated protein kinase (AMPK). The S262 phosphorylation increases USF1 interaction with SREBP1C near the sterol regulatory element (SRE) and facilitates the synergistic activation of SREBP1C and transcription of the downstream lipogenic genes. ^[11]
• USF1 S262 phosphorylation also recruits PCAF to acetylate USF1 at the site K237. Both S262 phosphorylation and K237 acetylation enhance USF1 activities and the subsequent transcriptional activation of the fatty acid synthase gene (FASN). ^[11] Fatty acid synthase (FAS), together with Acetyl-CoA carboxylase (ACC), produces malonyl-CoA, converts it to long-chain fatty acids, and promotes the de novo fatty-acid synthesis for energy provision and protein lipidation. ^{[21] [20]}
• USF1 modified with S262 phosphorylation an K237 acetylation also recruits BGR1 (also known as SMARCA4)-associated factor 60c (BAF60c). ^[15] BAF60c is then phosphorylated by atypical protein kinase C (aPKC) at S257, allowing it to form a LipoBAF complex at promoters of lipogenic genes to regulate chromatin structure and gene transcription. ^[15]
• In contrast, HDAC9 deacetylates USF1 during cell fasting, prevents the recruitment of USF1-interacting factors, and suppresses the transcriptional activation of lipogenic genes. ^[11]

In early embryonic development

USF1 transcription undergoes active dynamics during cell meiosis, in which the USF1 mRNA first increases significantly during 2-8 cells and then decreases to an undetectable level at the blastocyst stage, indicating its role in the embryo genome activation. ^[22] USF1 siRNA knockout has been shown to compromise the blastocyst rate and deregulate the transcripts of twist-related protein 2 (increased), growth differentiation factor-9 and follistatin (decreased) by affecting their promoter-binding element E-box region during oocyte maturation. ^[22]

Clinical significance

Diabetic kidney disease

Diabetic glomerulosclerosis shown by hematoxylin and eosin (HE) staining

Diabetic kidney disease (DKD) (or Diabetic nephropathy) is a progressive microalbuminuria disease with a slight loss of albumin in the urine (30–300 mg per day); DKD has been viewed as a diabetic complication-related microvascular disorder in a renal manifestation. ^[23] In kidney biopsy, DKD is characterized by glomerular and tubular basement thickening, mesangial expansion, glomerulosclerosis, podocyte effacement (histology) and nephron loss. ^[24] DKD occurs in 30%-50% of the diabetic patient population and leads to kidney failures in up to 20% of the type 1 diabetic patients. ^[24] However, a substantial portion of DKD patients do not manifest albuminuria. ^[24] DKD pathogenesis is attributed to the dysregulated glucose transport at a higher glucose level and the excessive influx of intracellular glucose into endothelial cells. ^[23] The elevated glucose level is sustained along with multiple metabolic phenotypes such as excess fatty acids and oxidative stress, as well as shear stress es induced by hypertension and hyperfusion, and can lead to microvascular rarefaction, hypoxia and maladaptation in glomerular neoangiogenesis. ^[23]

USF1 as an insulin-sensitive transcription factor that becomes active in response to a high glucose level promotes the transactivation of genes involved in lipid metabolism, including hepatic lipase (LIPC), hepatocyte nuclear factor 4 alpha (HNF4A), Apolipoprotein AI (APOA1), Apolipoprotein L1 (APOL1 ) and Haptoglobin-related protein (HPR). ^[25] Especially, APOL1 is known to complex with APOA-I and HDL to facilitate cell autophagy in response to injuries and prevent glomerular diseases; however, an APOL1 risk variant specific to podocyte inhibits cell autophagy and can trigger kidney disease. ^[25]

Cancer

Increased FASN-mediated de novo lipid synthesis

De novo lipogenesis in live cells

Cancer cells exhibit a set of phenotypes, including a highlighted increase in aerobic glycolysis, lactic acid production (known as the Warburg effect), elevated protein and DNA synthesis, and increased de novo or endogenous fatty acid synthesis by fatty acid synthase (FAS). ^[20] FAS synthesizes primarily palmitate from malonyl-CoA, which is further esterified to triglycerides for energy storage. Normally, FASN is active during embryogenesis and in fetal lungs for lubricant production; however, it is physiologically low-expressed in non-cancerous adult cells. In contrast, abnormal FASN overexpression is detected in multiple cancer types, spanning breast cancer, colorectal cancer, prostate cancer, pancreatic cancer and ovarian cancer. ^[26] FASN-mediated de novo lipid synthesis accounts for more than 93% of triglycerides in tumor cells. ^[20] Specifically, tumor cells prefer glycolysis over oxidation for energy consumption and re-direct the glycolytic products towards de novo fatty acid synthesis to supply lipids for membrane production and protein lipidation for fast cell proliferation. ^[20] For example, PI3K-AKT pathway is found to increase in LNCaP prostate cancer cells to stimulate FASN overexpression. Concurrently, fatty acid synthase overexpression is also post-translationally sustained by USP2 a-mediated ubiquitination reduction, stabilizing FAS for constitutive signal transduction. ^[20] In addition to de novo lipogenesis, FAS promotes the localization of VEGFR-2 to the lipid raft of the endothelial cell membrane and thus enhances angiogenesis in tumor development. ^[26] Meanwhile, mutual activation between FAS and ERBB2 (HER2) signaling also potentiates tumorigenesis, in which ERBB2 amplification is associated with elevated survival and proliferation of cancer cells and poor prognosis in breast and gastric cancers; an ERBB2 increase, especially, contributes to 18-25% of breast cancers. ^[27] In prostate cancer cells and promyelocytic leukemia cells, USF1 activation also attains a high-level of PAI-1 expression and inhibits spontaneous or camptothecin-induced apoptosis. ^[13]

MDM2 mediates p53 poly-ubiquitination and proteasomal degradation

Decreased USF1-p53 interaction and increased p53 instability

The poor prognosis of gastric cancers is associated with low expression of USF1 and p53. ^[28] Among gastric cancer patients, 88% of the patients are diagnosed with H. pylori infection, and half of the patients show lower USF1 expression in tumor tissues. Mechanistically, H. pylori induces DNA hypermethylation in the promoter regions of USF1 and USF2 and inhibits expression. Decreased expression reduces the interaction between USF1 and p53 when DNA damage occurs, rendering p53 to associate more frequently with the E3-ubiquitin ligase HDM2 (also known as MDM2) and increasing p53 instability in cancer cells. ^[28]

Familial combined hyperlipidemia

Familial combined hyperlipidemia (FCHL) was first used to describe lipid abnormalities in 47 Seattle pedigree-containing members with hypercholesterolemia and hypertriglyceridemia. ^[29] The core FCHL lipid profiles feature high serum cholesterol/triglyceride, apolipoprotein B (APOB) and LDL levels. Genetic evidence has suggested a FCHL-related locus on the human chromosome 1q21-q23, which is linked to metabolic syndromes. ^[30] Fine-mapping of those linked regions identifies USF1 as the first positionally cloned gene for FCHL and a target for FCHL treatment. In addition, hepatocyte nuclear factor 4 alpha (HNF4A) is also implicated in high lipid levels and metabolic syndromes. Cooperative effects of USF1 and HNF4A have been shown to regulate the expression of apolipoprotein A-II (APOA2) and apolipoprotein C-III (APOC3). ^[30] Mutations in USF1, HNF4A and apolipoproteins also increase patients' susceptibility to FCHL. ^[30] Additional genes subjected to USF1 regulation and involved in glucose/lipid metabolism include apolipoprotein A5 ( APOA5 ), apolipoprotein E (APOE), hormone-sensitive lipase (LIPE), hepatic lipase (LIPC), glucokinase (GCK), islet-specific glucose-6-phosphatase catalytic-subunit-related protein (IGRP), insulin, glucagon receptor (GCGR) and ATP-binding cassette transporter A1 ( ABCA1 ). ^[30]

Interactions

USF1 (human gene) has been shown to interact with USF2, ^{[31] [32]} FOSL1 ^[33] and GTF2I. ^{[34] [35]}

References

1. GRCh38: Ensembl release 89: ENSG00000158773 – Ensembl, May 2017
2. GRCm38: Ensembl release 89: ENSMUSG00000026641 – Ensembl, May 2017
3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
5. Shieh BH, Sparkes RS, Gaynor RB, Lusis AJ (April 1993). "Localization of the gene-encoding upstream stimulatory factor (USF) to human chromosome 1q22-q23". Genomics. 16 (1): 266–268. doi:10.1006/geno.1993.1174. PMID   8486371.
6. "Entrez Gene: USF1 upstream transcription factor 1".
7. Horbach T, Götz C, Kietzmann T, Dimova EY (2015-02-18). "Protein kinases as switches for the function of upstream stimulatory factors: implications for tissue injury and cancer". Frontiers in Pharmacology. 6: 3. doi: 10.3389/fphar.2015.00003 . PMC   4332324 . PMID   25741280.
8. Sanchez AP, Sharma K (April 2009). "Transcription factors in the pathogenesis of diabetic nephropathy". Expert Reviews in Molecular Medicine. 11: e13. doi:10.1017/S1462399409001057. PMID   19397838. S2CID   206329507.
9. Corre S, Galibert MD (October 2005). "Upstream stimulating factors: highly versatile stress-responsive transcription factors". Pigment Cell Research. 18 (5): 337–348. doi: 10.1111/j.1600-0749.2005.00262.x . PMID   16162174.
10. Anantharaman A, Lin IJ, Barrow J, Liang SY, Masannat J, Strouboulis J, et al. (April 2011). "Role of helix-loop-helix proteins during differentiation of erythroid cells". Molecular and Cellular Biology. 31 (7): 1332–1343. doi:10.1128/MCB.01186-10. PMC   3135301 . PMID   21282467.
11. Wang Y, Viscarra J, Kim SJ, Sul HS (November 2015). "Transcriptional regulation of hepatic lipogenesis". Nature Reviews. Molecular Cell Biology. 16 (11): 678–689. doi:10.1038/nrm4074. PMC   4884795 . PMID   26490400.
12. Laurila PP, Soronen J, Kooijman S, Forsström S, Boon MR, Surakka I, et al. (January 2016). "USF1 deficiency activates brown adipose tissue and improves cardiometabolic health". Science Translational Medicine. 8 (323): 323ra13. doi:10.1126/scitranslmed.aad0015. PMID   26819196. S2CID   24737539.
13. Samarakoon R, Higgins PJ (December 2008). "Integration of non-SMAD and SMAD signaling in TGF-beta1-induced plasminogen activator inhibitor type-1 gene expression in vascular smooth muscle cells". Thrombosis and Haemostasis. 100 (6): 976–983. doi:10.1160/TH08-05-0273. PMC   2963177 . PMID   19132220.
14. Borgo C, D'Amore C, Sarno S, Salvi M, Ruzzene M (May 2021). "Protein kinase CK2: a potential therapeutic target for diverse human diseases". Signal Transduction and Targeted Therapy. 6 (1): 183. doi:10.1038/s41392-021-00567-7. PMC   8126563 . PMID   33994545.
15. Viscarra J, Sul HS (April 2020). "Epigenetic Regulation of Hepatic Lipogenesis: Role in Hepatosteatosis and Diabetes". Diabetes. 69 (4): 525–531. doi:10.2337/dbi18-0032. PMC   7085244 . PMID   32198196.
16. Karin M, Liu Z, Zandi E (April 1997). "AP-1 function and regulation". Current Opinion in Cell Biology. 9 (2): 240–246. doi:10.1016/S0955-0674(97)80068-3. PMID   9069263.
17. Allshire RC, Madhani HD (April 2018). "Ten principles of heterochromatin formation and function". Nature Reviews. Molecular Cell Biology. 19 (4): 229–244. doi:10.1038/nrm.2017.119. PMC   6822695 . PMID   29235574.
18. Wang J, Lawry ST, Cohen AL, Jia S (December 2014). "Chromosome boundary elements and regulation of heterochromatin spreading". Cellular and Molecular Life Sciences. 71 (24): 4841–4852. doi:10.1007/s00018-014-1725-x. PMC   4234687 . PMID   25192661.
19. Ghirlando R, Giles K, Gowher H, Xiao T, Xu Z, Yao H, Felsenfeld G (July 2012). "Chromatin domains, insulators, and the regulation of gene expression". Biochimica et Biophysica Acta (BBA) - Gene Regulatory Mechanisms. 1819 (7): 644–651. doi:10.1016/j.bbagrm.2012.01.016. PMC   3484685 . PMID   22326678.
20. Menendez JA, Lupu R (October 2007). "Fatty acid synthase and the lipogenic phenotype in cancer pathogenesis". Nature Reviews. Cancer. 7 (10): 763–777. doi:10.1038/nrc2222. PMID   17882277. S2CID   205468233.
21. Mashima T, Seimiya H, Tsuruo T (May 2009). "De novo fatty-acid synthesis and related pathways as molecular targets for cancer therapy". British Journal of Cancer. 100 (9): 1369–1372. doi:10.1038/sj.bjc.6605007. PMC   2694429 . PMID   19352381.
22. Liu B, Yan J, Li J, Xia W (November 2023). "The Role of BDNF, YBX1, CENPF, ZSCAN4, TEAD4, GLIS1 and USF1 in the Activation of the Embryonic Genome in Bovine Embryos". International Journal of Molecular Sciences. 24 (22): 16019. doi: 10.3390/ijms242216019 . PMC   10671747 . PMID   38003209.
23. Thomas MC, Brownlee M, Susztak K, Sharma K, Jandeleit-Dahm KA, Zoungas S, et al. (July 2015). "Diabetic kidney disease". Nature Reviews. Disease Primers. 1 (1): 15018. doi:10.1038/nrdp.2015.18. PMC   7724636 . PMID   27188921.
24. Sandholm N, Dahlström EH, Groop PH (2023-05-30). "Genetic and epigenetic background of diabetic kidney disease". Frontiers in Endocrinology. 14: 1163001. doi: 10.3389/fendo.2023.1163001 . PMC   10262849 . PMID   37324271.
25. Adeyemo AA, Shriner D, Bentley AR, Gbadegesin RA, Rotimi CN (December 2021). "Evolutionary genetics and acclimatization in nephrology". Nature Reviews. Nephrology. 17 (12): 827–839. doi:10.1038/s41581-021-00483-7. PMC   8478000 . PMID   34584272.
26. Vanauberg D, Schulz C, Lefebvre T (March 2023). "Involvement of the pro-oncogenic enzyme fatty acid synthase in the hallmarks of cancer: a promising target in anti-cancer therapies". Oncogenesis. 12 (1): 16. doi:10.1038/s41389-023-00460-8. PMC   10024702 . PMID   36934087.
27. Baselga J, Swain SM (July 2009). "Novel anticancer targets: revisiting ERBB2 and discovering ERBB3". Nature Reviews. Cancer. 9 (7): 463–475. doi:10.1038/nrc2656. PMID   19536107. S2CID   23150684.
28. Lei ZN, Teng QX, Tian Q, Chen W, Xie Y, Wu K, et al. (October 2022). "Signaling pathways and therapeutic interventions in gastric cancer". Signal Transduction and Targeted Therapy. 7 (1): 358. doi:10.1038/s41392-022-01190-w. PMC   9547882 . PMID   36209270.
29. Shoulders CC, Jones EL, Naoumova RP (April 2004). "Genetics of familial combined hyperlipidemia and risk of coronary heart disease". Human Molecular Genetics. 13 Spec No 1 (90001): R149–R160. doi: 10.1093/hmg/ddh069 . PMID   14764618.
30. Suviolahti E, Lilja HE, Pajukanta P (January 2006). "Unraveling the complex genetics of familial combined hyperlipidemia". Annals of Medicine. 38 (5): 337–351. doi: 10.1080/07853890600865759 . PMID   16938803.
31. Ewing RM, Chu P, Elisma F, Li H, Taylor P, Climie S, et al. (2007). "Large-scale mapping of human protein-protein interactions by mass spectrometry". Molecular Systems Biology. 3 (1): 89. doi:10.1038/msb4100134. PMC   1847948 . PMID   17353931.
32. Viollet B, Lefrançois-Martinez AM, Henrion A, Kahn A, Raymondjean M, Martinez A (January 1996). "Immunochemical characterization and transacting properties of upstream stimulatory factor isoforms". The Journal of Biological Chemistry. 271 (3): 1405–1415. doi: 10.1074/jbc.271.3.1405 . PMID   8576131.
33. Pognonec P, Boulukos KE, Aperlo C, Fujimoto M, Ariga H, Nomoto A, Kato H (May 1997). "Cross-family interaction between the bHLHZip USF and bZip Fra1 proteins results in down-regulation of AP1 activity". Oncogene. 14 (17): 2091–2098. doi: 10.1038/sj.onc.1201046 . PMID   9160889.
34. Roy AL, Du H, Gregor PD, Novina CD, Martinez E, Roeder RG (December 1997). "Cloning of an inr- and E-box-binding protein, TFII-I, that interacts physically and functionally with USF1". The EMBO Journal. 16 (23): 7091–7104. doi:10.1093/emboj/16.23.7091. PMC   1170311 . PMID   9384587.
35. Roy AL, Meisterernst M, Pognonec P, Roeder RG (November 1991). "Cooperative interaction of an initiator-binding transcription initiation factor and the helix-loop-helix activator USF". Nature. 354 (6350): 245–248. Bibcode:1991Natur.354..245R. doi:10.1038/354245a0. PMID   1961251. S2CID   4260885.

Further reading

• Corre S, Galibert MD (January 2006). "[USF as a key regulatory element of gene expression]". Médecine/Sciences. 22 (1): 62–67. doi: 10.1051/medsci/200622162 . PMID   16386222.
• Lee JC, Lusis AJ, Pajukanta P (April 2006). "Familial combined hyperlipidemia: upstream transcription factor 1 and beyond". Current Opinion in Lipidology. 17 (2): 101–109. doi:10.1097/01.mol.0000217890.54875.13. PMID   16531745. S2CID   20122462.
• Roy AL, Meisterernst M, Pognonec P, Roeder RG (November 1991). "Cooperative interaction of an initiator-binding transcription initiation factor and the helix-loop-helix activator USF". Nature. 354 (6350): 245–248. Bibcode:1991Natur.354..245R. doi:10.1038/354245a0. PMID   1961251. S2CID   4260885.
• Gregor PD, Sawadogo M, Roeder RG (October 1990). "The adenovirus major late transcription factor USF is a member of the helix-loop-helix group of regulatory proteins and binds to DNA as a dimer". Genes & Development. 4 (10): 1730–1740. doi: 10.1101/gad.4.10.1730 . PMID   2249772.
• Henrion AA, Martinez A, Mattei MG, Kahn A, Raymondjean M (January 1995). "Structure, sequence, and chromosomal location of the gene for USF2 transcription factors in mouse". Genomics. 25 (1): 36–43. doi:10.1016/0888-7543(95)80107-W. PMID   7774954.
• Ferré-D'Amaré AR, Pognonec P, Roeder RG, Burley SK (January 1994). "Structure and function of the b/HLH/Z domain of USF". The EMBO Journal. 13 (1): 180–189. doi:10.1002/j.1460-2075.1994.tb06247.x. PMC   394791 . PMID   8306960.
• Viollet B, Lefrançois-Martinez AM, Henrion A, Kahn A, Raymondjean M, Martinez A (January 1996). "Immunochemical characterization and transacting properties of upstream stimulatory factor isoforms". The Journal of Biological Chemistry. 271 (3): 1405–1415. doi: 10.1074/jbc.271.3.1405 . PMID   8576131.
• Ghosh AK, Datta PK, Jacob ST (February 1997). "The dual role of helix-loop--helix-zipper protein USF in ribosomal RNA gene transcription in vivo". Oncogene. 14 (5): 589–594. doi:10.1038/sj.onc.1200866. PMID   9053857. S2CID   23764497.
• Pognonec P, Boulukos KE, Aperlo C, Fujimoto M, Ariga H, Nomoto A, Kato H (May 1997). "Cross-family interaction between the bHLHZip USF and bZip Fra1 proteins results in down-regulation of AP1 activity". Oncogene. 14 (17): 2091–2098. doi: 10.1038/sj.onc.1201046 . PMID   9160889.
• Roy AL, Du H, Gregor PD, Novina CD, Martinez E, Roeder RG (December 1997). "Cloning of an inr- and E-box-binding protein, TFII-I, that interacts physically and functionally with USF1". The EMBO Journal. 16 (23): 7091–7104. doi:10.1093/emboj/16.23.7091. PMC   1170311 . PMID   9384587.
• Pajukanta P, Nuotio I, Terwilliger JD, Porkka KV, Ylitalo K, Pihlajamäki J, et al. (April 1998). "Linkage of familial combined hyperlipidaemia to chromosome 1q21-q23". Nature Genetics. 18 (4): 369–373. doi:10.1038/ng0498-369. PMID   9537421. S2CID   5905269.
• Hartley JL, Temple GF, Brasch MA (November 2000). "DNA cloning using in vitro site-specific recombination". Genome Research. 10 (11): 1788–1795. doi:10.1101/gr.143000. PMC   310948 . PMID   11076863.
• Wiemann S, Weil B, Wellenreuther R, Gassenhuber J, Glassl S, Ansorge W, et al. (March 2001). "Toward a catalog of human genes and proteins: sequencing and analysis of 500 novel complete protein coding human cDNAs". Genome Research. 11 (3): 422–435. doi:10.1101/gr.GR1547R. PMC   311072 . PMID   11230166.
• Bengtsson SH, Madeyski-Bengtson K, Nilsson J, Bjursell G (July 2002). "Transcriptional regulation of the human carboxyl ester lipase gene in THP-1 monocytes: an E-box required for activation binds upstream stimulatory factors 1 and 2". The Biochemical Journal. 365 (Pt 2): 481–488. doi:10.1042/BJ20020223. PMC   1222691 . PMID   11945176.
• Villavicencio EH, Yoon JW, Frank DJ, Füchtbauer EM, Walterhouse DO, Iannaccone PM (April 2002). "Cooperative E-box regulation of human GLI1 by TWIST and USF". Genesis. 32 (4): 247–258. doi:10.1002/gene.10078. PMID   11948912. S2CID   12132097.
• Coulson JM, Edgson JL, Marshall-Jones ZV, Mulgrew R, Quinn JP, Woll PJ (February 2003). "Upstream stimulatory factor activates the vasopressin promoter via multiple motifs, including a non-canonical E-box". The Biochemical Journal. 369 (Pt 3): 549–561. doi:10.1042/BJ20021176. PMC   1223122 . PMID   12403649.
• Salero E, Giménez C, Zafra F (March 2003). "Identification of a non-canonical E-box motif as a regulatory element in the proximal promoter region of the apolipoprotein E gene". The Biochemical Journal. 370 (Pt 3): 979–986. doi:10.1042/BJ20021142. PMC   1223214 . PMID   12444925.
• Pickwell GV, Shih H, Quattrochi LC (April 2003). "Interaction of upstream stimulatory factor proteins with an E-box located within the human CYP1A2 5'-flanking gene contributes to basal transcriptional gene activation". Biochemical Pharmacology. 65 (7): 1087–1096. doi:10.1016/S0006-2952(03)00037-6. PMID   12663044.

External links

• FactorBook USF1