Structure of DcpS bound to m7GpppA

Experimental Data Snapshot

  • Resolution: 2.02 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.201 

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This is version 1.4 of the entry. See complete history


Insights into the structure, mechanism, and regulation of scavenger mRNA decapping activity

Gu, M.Fabrega, C.Liu, S.W.Liu, H.Kiledjian, M.Lima, C.D.

(2004) Mol Cell 14: 67-80

  • DOI: https://doi.org/10.1016/s1097-2765(04)00180-7
  • Primary Citation of Related Structures:  
    1ST0, 1ST4

  • PubMed Abstract: 

    Complete removal of residual N-7 guanine cap from degraded messenger RNA is necessary to prevent accumulation of intermediates that might interfere with RNA processing, export, and translation. The human scavenger decapping enzyme, DcpS, catalyzes residual cap hydrolysis following mRNA degradation, releasing N-7 methyl guanosine monophosphate and 5'-diphosphate terminated cap or mRNA products. DcpS structures bound to m(7)GpppG or m(7)GpppA reveal an asymmetric DcpS dimer that simultaneously creates an open nonproductive DcpS-cap complex and a closed productive DcpS-cap complex that alternate via 30 A domain movements. Structural and biochemical analysis suggests an autoregulatory mechanism whereby premature decapping mRNA is prevented by blocking the conformational changes that are required to form a closed productive active site capable of cap hydrolysis.

  • Organizational Affiliation

    Structural Biology Program, Sloan-Kettering Institute, New York, NY 10021, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
mRNA decapping enzymeA [auth B],
B [auth A]
337Homo sapiensMutation(s): 1 
Gene Names: DCPS
UniProt & NIH Common Fund Data Resources
Find proteins for Q96C86 (Homo sapiens)
Explore Q96C86 
Go to UniProtKB:  Q96C86
GTEx:  ENSG00000110063 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ96C86
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.02 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.201 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.037α = 90
b = 95.452β = 90
c = 177.981γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-04-13
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-10-27
    Changes: Database references, Derived calculations
  • Version 1.4: 2023-08-23
    Changes: Data collection, Refinement description