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Aliases | NFYA , CBF-A, CBF-B, HAP2, NF-YA, nuclear transcription factor Y subunit alpha | ||||||||||||||||||||||||||||||||||||||||||||||||||
External IDs | OMIM: 189903 MGI: 97316 HomoloGene: 32114 GeneCards: NFYA | ||||||||||||||||||||||||||||||||||||||||||||||||||
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Nuclear transcription factor Y subunit alpha is a protein that in humans is encoded by the NFYA gene. [5] [6]
The protein encoded by this gene is one subunit of a trimeric complex NF-Y, forming a highly conserved transcription factor that binds to CCAAT motifs in the promoter regions in a variety of genes. [7] Subunit NFYA associates with a tight dimer composed of the NFYB and NFYC subunits, resulting in a trimer that binds to DNA with high specificity and affinity. The sequence specific interactions of the complex are made by the NFYA subunit, suggesting a role as the regulatory subunit. In addition, there is evidence of post-transcriptional regulation in this gene product, either by protein degradation or control of translation. Further regulation is represented by alternative splicing in the glutamine-rich activation domain, with clear tissue-specific preferences for the two isoforms. [8]
NF-Y complex serves as a pioneer factor by promoting chromatin accessibility to facilitate other co-localizing cell type-specific transcription factors. [9]
NF-Y has also been implicated as a central player in transcription start site (TSS) selection in animals. [10] It safeguards the integrity of the nucleosome-depleted region and PIC localization at protein-coding gene promoters.
NFYA has been shown to interact with Serum response factor [11] and ZHX1. [11] [12] NFYA, NFYB and NFYC form the NFY complex and it has been shown that the NFY complex serves as a pioneer factor by promoting chromatin accessibility to facilitate other co-localizing cell type-specific transcription factors. [7]
The atomic structure of the NFY heterotrimer in complex with dsDNA was resolved via X-ray crystallography (PDB ID 4awl). [13] Using one of the NFYA alpha helices as a template, structure inspired stapled peptides were designed to disrupt the NFY heterotrimer formation by preventing NFYA from binding to the NFYB/C heterodimer. [14]
In molecular biology, a CCAAT box is a distinct pattern of nucleotides with GGCCAATCT consensus sequence that occur upstream by 60–100 bases to the initial transcription site. The CAAT box signals the binding site for the RNA transcription factor, and is typically accompanied by a conserved consensus sequence. It is an invariant DNA sequence at about minus 70 base pairs from the origin of transcription in many eukaryotic promoters. Genes that have this element seem to require it for the gene to be transcribed in sufficient quantities. It is frequently absent from genes that encode proteins used in virtually all cells. This box along with the GC box is known for binding general transcription factors. Both of these consensus sequences belong to the regulatory promoter. Full gene expression occurs when transcription activator proteins bind to each module within the regulatory promoter. Protein specific binding is required for the CCAAT box activation. These proteins are known as CCAAT box binding proteins/CCAAT box binding factors.
The TATA-binding protein (TBP) is a general transcription factor that binds to a DNA sequence called the TATA box. This DNA sequence is found about 30 base pairs upstream of the transcription start site in some eukaryotic gene promoters.
Transcription factor Sp1, also known as specificity protein 1* is a protein that in humans is encoded by the SP1 gene.
Jun dimerization protein 2 (JUNDM2) is a protein that in humans is encoded by the JDP2 gene. The Jun dimerization protein is a member of the AP-1 family of transcription factors.
Transcription factor p65 also known as nuclear factor NF-kappa-B p65 subunit is a protein that in humans is encoded by the RELA gene.
CCAAT/enhancer-binding protein beta is a protein that in humans is encoded by the CEBPB gene.
Nuclear transcription factor Y subunit beta is a protein that in humans is encoded by the NFYB gene.
CCAAT/enhancer-binding protein delta is a protein that in humans is encoded by the CEBPD gene.
Transcription initiation factor TFIID subunit 7 also known as TAFII55 is a protein that in humans is encoded by the TAF7 gene.
Serum response factor, also known as SRF, is a transcription factor protein.
YY1 is a transcriptional repressor protein in humans that is encoded by the YY1 gene.
Transcription initiation factor TFIID subunit 4 is a protein that in humans is encoded by the TAF4 gene.
Transcription initiation factor TFIID subunit 5 is a protein that in humans is encoded by the TAF5 gene.
Transcription initiation factor TFIID subunit 11 also known as TAFII28, is a protein that in humans is encoded by the TAF11 gene.
Nuclear transcription factor Y subunit gamma is a protein that in humans is encoded by the NFYC gene.
Transcription factor Sp4 is a protein that in humans is encoded by the SP4 gene.
CCAAT/enhancer-binding protein zeta is a protein that in humans is encoded by the CEBPZ gene.
Mediator of RNA polymerase II transcription subunit 26 is an enzyme that in humans is encoded by the MED26 gene. It forms part of the Mediator complex.
In biochemistry, the KIX domain (kinase-inducible domain (KID) interacting domain) or CREB binding domain is a protein domain of the eukaryotic transcriptional coactivators CBP and P300. It serves as a docking site for the formation of heterodimers between the coactivator and specific transcription factors. Structurally, the KIX domain is a globular domain consisting of three α-helices and two short 310-helices.
Euchromatic histone-lysine N-methyltransferase 1, also known as G9a-like protein (GLP), is a protein that in humans is encoded by the EHMT1 gene.
This article incorporates text from the United States National Library of Medicine, which is in the public domain.