1ST0

Structure of DcpS bound to m7GpppG


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

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

  • Primary Citation of Related Structures:  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 re ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
mRNA decapping enzyme
B, A
337Homo sapiensGene Names: DCPS (DCS1, HINT5)
EC: 3.6.1.59
Find proteins for Q96C86 (Homo sapiens)
Go to Gene View: DCPS
Go to UniProtKB:  Q96C86
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
YT3
Query on YT3

Download SDF File 
Download CCD File 
A
YTTRIUM (III) ION
Y
GRTBAGCGDOYUBE-UHFFFAOYSA-N
 Ligand Interaction
GTG
Query on GTG

Download SDF File 
Download CCD File 
A, B
7-METHYL-GUANOSINE-5'-TRIPHOSPHATE-5'-GUANOSINE
MRNA CAP ANALOG N7-METHYL GPPPG
C21 H30 N10 O18 P3
FHHZHGZBHYYWTG-INFSMZHSSA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.187 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 59.446α = 90.00
b = 94.783β = 90.00
c = 178.328γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
SOLVEphasing
REFMACrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-04-13
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance