cAMP responsive element modulator is a protein that in humans is encoded by the CREM gene, [5] [6] [7] and it belongs to the cAMP-responsive element binding protein family. It has multiple isoforms, which act either as repressors or activators. [8] CREB family is important for in regulating transcription in response to various stresses, metabolic and developmental signals. [9] CREM transcription factors also play an important role in many physiological systems, such as cardiac function, [10] circadian rhythms, [11] locomotion and spermatogenesis. [12]
This gene encodes a bZIP transcription factor that binds to the cAMP responsive element found in many viral and cellular promoters. It is an important component of cAMP-mediated signal transduction during the spermatogenetic cycle, as well as other complex processes. Alternative promoter and translation initiation site usage allows this gene to exert spatial and temporal specificity to cAMP responsiveness. Multiple alternatively spliced transcript variants encoding several different isoforms have been found for this gene, with some of them functioning as activators and some as repressors of transcription. [7]
The chromosomal location of CREM gene is at 10p11.21, where it starts at 35415769 and ends at 35501886 bp from pter ( according to hg19-Feb_2009) [13]
CAMP responsive element modulator has been shown to interact with FHL5. [14] [15]
One study reported the DNA sequence variations in the gene for CREM in panic disorder patients. It showed a significant excess of the shorter eight-repeat allele and of genotypes containing the eight-repeat allele in panic disorder patients. [16] The observed associations were limited to panic disorder without agoraphobia, and they were more prominent in females. But, the independent Italian and Spanish samples in this study did not support their results. Another family-based study showed little evidence of any susceptibility locus for panic disorder either within the CREM gene or in a nearby region on chromosome 10p11 [17]
CREM has been shown to be a master-switch regulator in testis. [18] It plays an important role in the regulation of the expression of post-meiotic genes, and this has been supported by several studies using CREM-mutation mice. [19] The results showed the first step in the process of sperm formation would be blocked if the germ cell development in mice CREM gene were disrupted. The cAMP response element sites can be found in the promoter region of some postmeiotic genes, so that the CREM can target and regulate these genes. [18]
Two studies proved that treatment of rats with Salvia hypoleuca and Alpina galanga can significantly increased the CREM gene expression. [20] [21]
Less IL-2 will be produced from T cells in humans or mice with systemic lupus erythematousus (SLE). Some studies showed that an increased level CREM was presented in the nucleus of T lymphocytes from SLE patients. The CREM bound to the -180 site of the IL-2 promoter to repress its transcription. [22]
CREB-TF is a cellular transcription factor. It binds to certain DNA sequences called cAMP response elements (CRE), thereby increasing or decreasing the transcription of the genes. CREB was first described in 1987 as a cAMP-responsive transcription factor regulating the somatostatin gene.
Protein c-Fos is a proto-oncogene that is the human homolog of the retroviral oncogene v-fos. It is encoded in humans by the FOS gene. It was first discovered in rat fibroblasts as the transforming gene of the FBJ MSV. It is a part of a bigger Fos family of transcription factors which includes c-Fos, FosB, Fra-1 and Fra-2. It has been mapped to chromosome region 14q21→q31. c-Fos encodes a 62 kDa protein, which forms heterodimer with c-jun, resulting in the formation of AP-1 complex which binds DNA at AP-1 specific sites at the promoter and enhancer regions of target genes and converts extracellular signals into changes of gene expression. It plays an important role in many cellular functions and has been found to be overexpressed in a variety of cancers.
CCAAT/enhancer-binding protein beta is a protein that in humans is encoded by the CEBPB gene.
CAMP responsive element binding protein 1, also known as CREB-1, is a protein that in humans is encoded by the CREB1 gene. This protein binds the cAMP response element, a DNA nucleotide sequence present in many viral and cellular promoters. The binding of CREB1 stimulates transcription.
Cyclic AMP-dependent transcription factor ATF-3 is a protein that, in humans, is encoded by the ATF3 gene.
Cyclic AMP-dependent transcription factor ATF-1 is a protein that in humans is encoded by the ATF1 gene.
Activating transcription factor 4 , also known as ATF4, is a protein that in humans is encoded by the ATF4 gene.
Calcium/calmodulin-dependent protein kinase type II gamma chain is an enzyme that in humans is encoded by the CAMK2G gene.
Activating transcription factor 2, also known as ATF2, is a protein that, in humans, is encoded by the ATF2 gene.
protein S6 kinase, 90kDa, polypeptide 3, also s RPS6KA3, is an enzyme that in humans is encoded by the RPS6KA3 gene.
Myocyte-specific enhancer factor 2A is a protein that in humans is encoded by the MEF2A gene. MEF2A is a transcription factor in the Mef2 family. In humans it is located on chromosome 15q26. Certain mutations in MEF2A cause an autosomal dominant form of coronary artery disease and myocardial infarction.
Ribosomal protein S6 kinase alpha-2 is an enzyme that in humans is encoded by the RPS6KA2 gene.
Transcription initiation factor TFIID subunit 4 is a protein that in humans is encoded by the TAF4 gene.
Cyclic AMP-responsive element-binding protein 3 is a protein that in humans is encoded by the CREB3 gene.
Four and a half LIM domains protein 5 is a protein that in humans is encoded by the FHL5 gene.
Activating transcription factor 5, also known as ATF5, is a protein that, in humans, is encoded by the ATF5 gene.
CAMP responsive element binding protein-like 1, also known as CREBL1, is a protein which in humans is encoded by the CREBL1 gene.
DNA-binding protein RFX2 is a protein that in humans is encoded by the RFX2 gene.
The Basic Leucine Zipper Domain is found in many DNA binding eukaryotic proteins. One part of the domain contains a region that mediates sequence specific DNA binding properties and the leucine zipper that is required to hold together (dimerize) two DNA binding regions. The DNA binding region comprises a number of basic amino acids such as arginine and lysine. Proteins containing this domain are transcription factors.
Paolo Sassone-Corsi was an Italian molecular biologist, epigeneticist, and researcher. He is known for his contributions in the areas of transcriptional regulation, epigenetics, circadian biology, and metabolic regulation. He is known for his contributions in the areas of transcriptional regulation, epigenetics, circadian biology, and metabolic regulation. His research primarily focused on the mechanisms that regulate transcription and their relation to metabolism and circadian clocks. His work focused on understanding how the circadian clock regulates metabolic cycles. Most notably, he discovered that SIRT1, a histone deacetylase with a critical role in gene expression and metabolism, is able to regulate the activity of the CLOCK protein. In 2011, Sassone-Corsi founded and directed the “Center for Epigenetics and Metabolism” at the University of California, Irvine.
This article incorporates text from the United States National Library of Medicine, which is in the public domain.