4DCG

VACCINIA METHYLTRANSFERASE VP39 MUTANT D182A COMPLEXED WITH M7G AND S-ADENOSYLHOMOCYSTEINE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.225 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.4 of the entry. See complete history


Literature

mRNA cap recognition: dominant role of enhanced stacking interactions between methylated bases and protein aromatic side chains.

Hu, G.Gershon, P.D.Hodel, A.E.Quiocho, F.A.

(1999) Proc Natl Acad Sci U S A 96: 7149-7154

  • DOI: https://doi.org/10.1073/pnas.96.13.7149
  • Primary Citation of Related Structures:  
    1B42, 1BKY, 1EAM, 1EQA, 3MAG, 3MCT, 4DCG

  • PubMed Abstract: 

    We have determined, by high resolution x-ray analysis, 10 structures comprising the mRNA cap-specific methyltransferase VP39 or specific mutants thereof in the presence of methylated nucleobase analogs (N1-methyladenine, N3-methyladenine, N1-methylcytosine, N3-methylcytosine) and their unmethylated counterparts, or nucleoside N7-methylguanosine. Together with solution affinity studies and previous crystallographic data for N7-methylguanosine and its phosphorylated derivatives, these data demonstrate that only methylated, positively charged bases are bound, indicating that their enhanced stacking with two aromatic side chains of VP39 (Tyr 22 and Phe 180) plays a dominant role in cap recognition. Four key features characterize this stacking interaction: (i) near perfect parallel alignment between the sandwiched methylated bases and aromatic side chains, (ii) substantial areas of overlap in the two-stacked rings, (iii) a 3.4-A interplanar spacing within the overlapping region, and (iv) positive charge in the heterocyclic nucleobase.


  • Organizational Affiliation

    Graduate Program in Structural and Computational Biology and Molecular Biophysics, Baylor College of Medicine, Houston, TX 77030, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
VP39307Vaccinia virusMutation(s): 1 
EC: 2.7.7.19
UniProt
Find proteins for P07617 (Vaccinia virus (strain Western Reserve))
Explore P07617 
Go to UniProtKB:  P07617
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP07617
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
SAH
Query on SAH

Download Ideal Coordinates CCD File 
B [auth A]S-ADENOSYL-L-HOMOCYSTEINE
C14 H20 N6 O5 S
ZJUKTBDSGOFHSH-WFMPWKQPSA-N
MG7
Query on MG7

Download Ideal Coordinates CCD File 
C [auth A]7-METHYLGUANOSINE
C11 H16 N5 O5
OGHAROSJZRTIOK-KQYNXXCUSA-O
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.225 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.334α = 90
b = 66.735β = 117.21
c = 79.392γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
SMARTdata reduction
SAINTdata scaling
X-PLORphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-07-22
    Type: Initial release
  • Version 1.1: 2008-03-25
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-11-03
    Changes: Database references, Derived calculations, Other
  • Version 1.4: 2024-02-28
    Changes: Data collection