TRPC4AP

Function

Substrate-recognition component of a DCX (DDB1-CUL4-X-box) E3 ubiquitin-protein ligase complex required for cell cycle control (PubMed:20551172, PubMed:29779948). The DCX(TRPC4AP) complex specifically mediates the polyubiquitination and subsequent degradation of MYC as part of the DesCEND (destruction via C-end degrons) pathway (PubMed:20551172, PubMed:29779948). The DesCEND (destruction via C-end degrons) pathway recognizes a C-degron located at the extreme C terminus of target proteins, leading to their ubiquitination and degradation (PubMed:29779948). The DCX(TRPC4AP) complex specifically recognizes proteins with an arginine at the minus 3 position (R-3 motif) at the C-terminus, such as MYC, leading to their ubiquitination and degradation (PubMed:29779948). Also participates in the activation of NFKB1 in response to ligation of TNFRSF1A, possibly by linking TNFRSF1A to the IKK signalosome (By similarity). Involved in JNK activation via its interaction with TRAF2 (By similarity). Also involved in elevation of endoplasmic reticulum Ca(2+) storage reduction in response to CHRM1 (By similarity).

Pathway

Protein modification; protein ubiquitination.

Post-translational modifications

Phosphorylated by GSK3B; phosphorylation is required for ubiquitination.

Ubiquitinated by a SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase containing SKP2, leading to its degradation (PubMed:26038816). Phosphorylation by GSK3B is required for ubiquitination (PubMed:26038816).

Cellular localization

• Cytoplasm
• Perinuclear region

Alternative names

C20orf188, TRRP4AP, TRPC4AP, Short transient receptor potential channel 4-associated protein, Trp4-associated protein, Trpc4-associated protein, Protein TAP1, TNF-receptor ubiquitous scaffolding/signaling protein, Protein TRUSS

Database links

swissprot:Q8TEL6 entrezGene:26133 genbank:NP_056453.1 omim:608430