3OKP

Crystal structure of Corynebacterium glutamicum PimB' bound to GDP-Man (orthorhombic crystal form)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Acceptor substrate discrimination in phosphatidyl-myo-inositol mannoside synthesis: structural and mutational analysis of mannosyltransferase Corynebacterium glutamicum PimB'.

Batt, S.M.Jabeen, T.Mishra, A.K.Veerapen, N.Krumbach, K.Eggeling, L.Besra, G.S.Futterer, K.

(2010) J.Biol.Chem. 285: 37741-37752

  • DOI: 10.1074/jbc.M110.165407
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Long term survival of the pathogen Mycobacterium tuberculosis in humans is linked to the immunomodulatory potential of its complex cell wall glycolipids, which include the phosphatidylinositol mannoside (PIM) series as well as the related lipomannan ...

    Long term survival of the pathogen Mycobacterium tuberculosis in humans is linked to the immunomodulatory potential of its complex cell wall glycolipids, which include the phosphatidylinositol mannoside (PIM) series as well as the related lipomannan and lipoarabinomannan glycoconjugates. PIM biosynthesis is initiated by a set of cytosolic α-mannosyltransferases, catalyzing glycosyl transfer from the activated saccharide donor GDP-α-D-mannopyranose to the acceptor phosphatidyl-myo-inositol (PI) in an ordered and regio-specific fashion. Herein, we report the crystal structure of mannosyltransferase Corynebacterium glutamicum PimB' in complex with nucleotide to a resolution of 2.0 Å. PimB' attaches mannosyl selectively to the 6-OH of the inositol moiety of PI. Two crystal forms and GDP- versus GDP-α-d-mannopyranose-bound complexes reveal flexibility of the nucleotide conformation as well as of the structural framework of the active site. Structural comparison, docking of the saccharide acceptor, and site-directed mutagenesis pin regio-selectivity to a conserved Asp residue in the N-terminal domain that forces presentation of the correct inositol hydroxyl to the saccharide donor.


    Organizational Affiliation

    School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GDP-mannose-dependent alpha-(1-6)-phosphatidylinositol monomannoside mannosyltransferase
A
394Corynebacterium glutamicum (strain ATCC 13032 / DSM 20300 / JCM 1318 / LMG 3730 / NCIMB 10025)Mutation(s): 0 
Gene Names: pimB
EC: 2.4.1.346
Find proteins for Q8NNK8 (Corynebacterium glutamicum (strain ATCC 13032 / DSM 20300 / JCM 1318 / LMG 3730 / NCIMB 10025))
Go to UniProtKB:  Q8NNK8
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDD
Query on GDD

Download SDF File 
Download CCD File 
A
GUANOSINE-5'-DIPHOSPHATE-ALPHA-D-MANNOSE
C16 H25 N5 O16 P2
MVMSCBBUIHUTGJ-GDJBGNAASA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
GDDKd: 19000 nM BINDINGMOAD
GDDKd: 19000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.203 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 44.746α = 90.00
b = 87.002β = 90.00
c = 106.895γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
ADSCdata collection
PHASERphasing
REFMACrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-09-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance