CUL4A — Cullin 4A
CUL4A belongs to a gene co-expression module in 2 of 28 SCUBA cell types. Each module groups genes that rise and fall together in that cell type; the genes it shares a module with are its closest co-expression partners there.
CUL4A's module in each cell type
| Cell type | Module | Shares the module with | |
|---|---|---|---|
| Gamma-delta T cells | Chromatin Epigenetic Regulation DNA/chromatin regulation | CASP8AP2, CNPPD1, CYBC1, EPRS1, FAM8A1, GTF2H3, IL17RA, KCTD7 +15 more | |
| Macrophages | RAB-mediated Trafficking Vesicular traficking | ABI1, ACSL3, ARMC8, CACUL1, CD86, CHST15, CRTC3, CTNNA1 +27 more | View in SCUBA |
About the gene
| Chromosome | 13: 113208193-113267108 |
|---|---|
| Predicted location | Intracellular |
| Essential gene | No |
| Protein class | Predicted intracellular proteins |
| Biological process | Biological rhythms, DNA damage, DNA repair, Host-virus interaction, Ubl conjugation pathway |
Function
Core component of multiple cullin-RING-based E3 ubiquitin- protein ligase complexes which mediate the ubiquitination of target proteins. As a scaffold protein may contribute to catalysis through positioning of the substrate and the ubiquitin-conjugating enzyme. The E3 ubiquitin- protein ligase activity of the complex is dependent on the neddylation of the cullin subunit and is inhibited by the association of the deneddylated cullin subunit with TIP120A/CAND1. The functional specificity of the E3 ubiquitin-protein ligase complex depends on the variable substrate recognition component. DCX(DET1-COP1) directs ubiquitination of JUN. DCX(DDB2) directs ubiquitination of XPC. DCX(DDB2) ubiquitinates histones H3-H4 and is required for efficient histone deposition during replication-coupled (H3.1) and replication-independent (H3.3) nucleosome assembly, probably by facilitating the transfer of H3 from ASF1A/ASF1B to other chaperones involved in histone deposition. DCX(DTL) plays a role in PCNA-dependent polyubiquitination of CDT1 and MDM2-dependent ubiquitination of p53/TP53 in response to radiation-induced DNA damage and during DNA replication. DCX(DTL) directs autoubiquitination of DTL. In association with DDB1 and SKP2 probably is involved in ubiquitination of CDKN1B/p27kip. Is involved in ubiquitination of HOXA9. The DDB1-CUL4A- DTL E3 ligase complex regulates the circadian clock function by mediating the ubiquitination and degradation of CRY1. The DCX(ERCC8) complex (also named CSA complex) plays a role in transcription-coupled repair (TCR). A number of DCX complexes (containing either TRPC4AP or DCAF12 as substrate-recognition component) are part of the DesCEND (destruction via C-end degrons) pathway, which recognizes a C-degron located at the extreme C terminus of target proteins, leading to their ubiquitination and degradation. The DCX(AMBRA1) complex is a master regulator of the transition from G1 to S cell phase by mediating ubiquitination of phosphorylated cyclin-D (CCND1, CCND2 and CCND3). The DCX(AMBRA1) complex also acts as a regulator of Cul5-RING (CRL5) E3 ubiquitin-protein ligase complexes by mediating ubiquitination and degradation of Elongin-C (ELOC) component of CRL5 complexes. With CUL4B, contributes to ribosome biogenesis.
Human Protein Atlas · Open Targets · UniProt
Gene annotation from the Human Protein Atlas and UniProt; see sources & licences.