DCPS (gene)

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Protein DCPS PDB 1st0.png
Available structures
PDB Ortholog search: PDBe RCSB
Aliases DCPS, DCS1, HINT-5, HINT5, HSL1, ARS, HSPC015, decapping enzyme, scavenger
External IDs MGI: 1916555 HomoloGene: 32202 GeneCards: DCPS
Species Human Mouse
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC) Chr 11: 126.3 – 126.35 Mb Chr 9: 35.12 – 35.18 Mb
PubMed search [1] [2]
View/Edit Human View/Edit Mouse
Scavenger mRNA decapping enzyme (DcpS) N-terminal
PDB 1vlr EBI.jpg
crystal structure of mrna decapping enzyme (dcps) from mus musculus at 1.83 a resolution
Symbol DcpS
Pfam PF05652
InterPro IPR008594
SCOP 1st4
Scavenger mRNA decapping enzyme C-term binding
Symbol DcpS_C
Pfam PF11969
Pfam clan CL0265
SCOP 1st4

Scavenger mRNA-decapping enzyme DcpS is a protein that in humans is encoded by the DCPS gene.[3][4][5]

The scavenger mRNA decapping enzymes include Dcp2 and DcpS. DcpS is a scavenger pyrophosphatase that hydrolyses the residual cap structure following 3' to 5' mRNA degradation. DcpS uses cap dinucleotides or capped oligonucleotides as substrates to release m(7)GMP (N7-methyl GMP), while Dcp2 uses capped mRNA as a substrate in order to hydrolyse the cap to release m(7)GDP (N7-methyl GDP).[6] The association of DcpS with 3' to 5' exonuclease exosome components suggests that these two activities are linked and there is a coupled exonucleolytic decay-dependent decapping pathway. The family contains a histidine triad (HIT) sequence in its C-terminal domain, with three histidines separated by hydrophobic residues.[7] The central histidine within the DcpS HIT motif is critical for decapping activity and defines the HIT motif as a new mRNA decapping domain, making DcpS the first member of the HIT family of proteins with a defined biological function.


  1. ^ "Human PubMed Reference:". 
  2. ^ "Mouse PubMed Reference:". 
  3. ^ Liu H, Rodgers ND, Jiao X, Kiledjian M (Aug 2002). "The scavenger mRNA decapping enzyme DcpS is a member of the HIT family of pyrophosphatases". EMBO J. 21 (17): 4699–4708. PMC 126188Freely accessible. PMID 12198172. doi:10.1093/emboj/cdf448. 
  4. ^ van Dijk E, Le Hir H, Seraphin B (Oct 2003). "DcpS can act in the 5'-3' mRNA decay pathway in addition to the 3'-5' pathway". Proc Natl Acad Sci U S A. 100 (21): 12081–12086. PMC 218716Freely accessible. PMID 14523240. doi:10.1073/pnas.1635192100. 
  5. ^ "Entrez Gene: DCPS decapping enzyme, scavenger". 
  6. ^ Liu H, Kiledjian M (February 2006). "Decapping the message: a beginning or an end". Biochem. Soc. Trans. 34 (Pt 1): 35–8. PMID 16246173. doi:10.1042/BST20060035. 
  7. ^ Han GW, Schwarzenbacher R, McMullan D, Abdubek P, Ambing E, Axelrod H, Biorac T, Canaves JM, Chiu HJ, Dai X, Deacon AM, DiDonato M, Elsliger MA, Godzik A, Grittini C, Grzechnik SK, Hale J, Hampton E, Haugen J, Hornsby M, Jaroszewski L, Klock HE, Koesema E, Kreusch A, Kuhn P, Lesley SA, McPhillips TM, Miller MD, Moy K, Nigoghossian E, Paulsen J, Quijano K, Reyes R, Spraggon G, Stevens RC, van den Bedem H, Velasquez J, Vincent J, White A, Wolf G, Xu Q, Hodgson KO, Wooley J, Wilson IA (September 2005). "Crystal structure of an Apo mRNA decapping enzyme (DcpS) from Mouse at 1.83 A resolution". Proteins. 60 (4): 797–802. PMID 16001405. doi:10.1002/prot.20467. 

Further reading[edit]

This article incorporates text from the public domain Pfam and InterPro IPR008594