Valosin-containing protein

VCP
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
AliasesVCP, ALS14, HEL-220, HEL-S-70, IBMPFD, IBMPFD1, TERA, p97, Valosin-containing protein, CMT2Y, valosin containing protein, CDC48, FTDALS6
External IDsOMIM: 601023; MGI: 99919; HomoloGene: 5168; GeneCards: VCP; OMA:VCP - orthologs
Orthologs
SpeciesHumanMouse
Entrez

7415

269523

Ensembl

ENSG00000165280

ENSMUSG00000028452

UniProt

P55072

Q01853

RefSeq (mRNA)

NM_007126
NM_001354927
NM_001354928

NM_009503

RefSeq (protein)

NP_009057
NP_001341856
NP_001341857

NP_033529

Location (UCSC)Chr 9: 35.05 – 35.07 MbChr 4: 42.98 – 43 Mb
PubMed search
Wikidata
View/Edit HumanView/Edit Mouse

Valosin-containing protein (VCP) or transitional endoplasmic reticulum ATPase (TER ATPase) also known as p97 in mammals and CDC48 in S. cerevisiae, is an enzyme that in humans is encoded by the VCP gene. The TER ATPase is an ATPase enzyme present in all eukaryotes and archaebacteria. Its main function is to segregate protein molecules from large cellular structures such as protein assemblies, organelle membranes and chromatin, and thus facilitate the degradation of released polypeptides by the multi-subunit protease proteasome.

VCP/p97/CDC48 is a member of the AAA+ (extended family of ATPases associated with various cellular activities) ATPase family. Enzymes of this family are found in all species from bacteria to humans. Many of them are important chaperones that regulate folding or unfolding of substrate proteins. VCP is a type II AAA+ ATPase, which means that it contains two tandem ATPase domains (named D1 and D2, respectively) (Figure 1).

The two ATPase domains are connected by a short polypeptide linker. A domain preceding the D1 domain (N-terminal domain) and a short carboxyl-terminal tail are involved in interaction with cofactors. The N-domain is connected to the D1 domain by a short N-D1 linker.

Most known substrates of VCP are modified with ubiquitin chains and degraded by the 26S proteasome. Accordingly, many VCP coenzymes and adaptors have domains that can recognize ubiquitin. It has become evident that the interplays between ubiquitin and VCP cofactors are critical for many of the proposed functions, although the precise role of these interactions remains to be elucidated.