Transcription factor E2F4 is a protein that in humans is encoded by the E2F4 gene. [5] [6]
The protein encoded by this gene is a member of the E2F family of transcription factors. The E2F family plays a crucial role in the control of cell cycle and action of tumor suppressor proteins and is also a target of the transforming proteins of small DNA tumor viruses. This protein binds to all three of the tumor suppressor proteins pRB, p107 and p130, but with higher affinity to the last two. It plays an important role in the suppression of proliferation-associated genes, and its gene mutation and increased expression may be associated with human cancer. [7]
The E2F proteins contain several evolutionally conserved domains found in most members of the family. These domains include a DNA binding domain, a dimerization domain which determines interaction with the differentiation regulated transcription factor proteins (DP), a transactivation domain enriched in acidic amino acids (Asp + Glu), and a tumor suppressor protein association domain which is embedded within the transactivation domain.
E2F is a group of genes that encodes a family of transcription factors (TF) in higher eukaryotes. Three of them are activators: E2F1, 2 and E2F3a. Six others act as suppressors: E2F3b, E2F4-8. All of them are involved in the cell cycle regulation and synthesis of DNA in mammalian cells. E2Fs as TFs bind to the TTTCCCGC consensus binding site in the target promoter sequence.
Transcription factor E2F1 is a protein that in humans is encoded by the E2F1 gene.
Retinoblastoma-like protein 2 is a protein that in humans is encoded by the RBL2 gene.
G1/S-specific cyclin-E1 is a protein that in humans is encoded by the CCNE1 gene.
Cell division control protein 6 homolog is a protein that in humans is encoded by the CDC6 gene.
Transcription factor E2F2 is a protein that in humans is encoded by the E2F2 gene.
Retinoblastoma-like 1 (p107), also known as RBL1, is a protein that in humans is encoded by the RBL1 gene.
Transcription factor Dp-1 is a protein that in humans is encoded by the TFDP1 gene.
RNA polymerase II subunit A C-terminal domain phosphatase is an enzyme that in humans is encoded by the CTDP1 gene.
MAP kinase-activating death domain protein is an enzyme that in humans is encoded by the MADD gene.
Transcription factor E2F5 is a protein that in humans is encoded by the E2F5 gene.
Rhombotin-1 is a protein that in humans is encoded by the LMO1 gene.
Cyclic AMP-responsive element-binding protein 3 is a protein that in humans is encoded by the CREB3 gene.
Transcription factor Dp-2 is a protein that in humans is encoded by the TFDP2 gene that dimerises with E2F, a key transcriptional activator involved in the regulation of the cell cycle.
Transcription factor AP-4 , also known as TFAP4, is a protein which in humans is encoded by the TFAP4 gene.
General transcription factor IIF subunit 1 is a protein that in humans is encoded by the GTF2F1 gene.
Transcription factor IIIB 50 kDa subunit (TFIIIB50) also known as b-related factor 2 (BRF-2) is a protein that in humans is encoded by the BRF2 gene.
Microfibrillar-associated protein 1 is a protein that in humans is encoded by the MFAP1 gene.
The retinoblastoma protein is a tumor suppressor protein that is dysfunctional in several major cancers. One function of pRb is to prevent excessive cell growth by inhibiting cell cycle progression until a cell is ready to divide. When the cell is ready to divide, pRb is phosphorylated, inactivating it, and the cell cycle is allowed to progress. It is also a recruiter of several chromatin remodeling enzymes such as methylases and acetylases.
The dimerization partner, RB-like, E2F and multi-vulval class B (DREAM) complex is a protein complex responsible for the regulation of cell cycle-dependent gene expression. The complex is evolutionarily conserved, although some of its components vary from species to species. In humans, the key proteins in the complex are RBL1 (p107) and RBL2 (p130), both of which are homologs of RB (p105) and bind repressive E2F transcription factors E2F4 and E2F5; DP1, DP2 and DP3, dimerization partners of E2F; and MuvB, which is a complex of LIN9/37/52/54 and RBBP4.
This article incorporates text from the United States National Library of Medicine, which is in the public domain.