5D4T

SeMet-labelled HcgC from Methanocaldococcus jannaschii in space group P212121


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.229 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Identification of HcgC as a SAM-Dependent Pyridinol Methyltransferase in [Fe]-Hydrogenase Cofactor Biosynthesis.

Fujishiro, T.Bai, L.Xu, T.Xie, X.Schick, M.Kahnt, J.Rother, M.Hu, X.Ermler, U.Shima, S.

(2016) Angew Chem Int Ed Engl 55: 9648-9651

  • DOI: https://doi.org/10.1002/anie.201604352
  • Primary Citation of Related Structures:  
    5D4T, 5D4U, 5D4V, 5D5O, 5D5T

  • PubMed Abstract: 

    Previous retrosynthetic and isotope-labeling studies have indicated that biosynthesis of the iron guanylylpyridinol (FeGP) cofactor of [Fe]-hydrogenase requires a methyltransferase. This hypothetical enzyme covalently attaches the methyl group at the 3-position of the pyridinol ring. We describe the identification of HcgC, a gene product of the hcgA-G cluster responsible for FeGP cofactor biosynthesis. It acts as an S-adenosylmethionine (SAM)-dependent methyltransferase, based on the crystal structures of HcgC and the HcgC/SAM and HcgC/S-adenosylhomocysteine (SAH) complexes. The pyridinol substrate, 6-carboxymethyl-5-methyl-4-hydroxy-2-pyridinol, was predicted based on properties of the conserved binding pocket and substrate docking simulations. For verification, the assumed substrate was synthesized and used in a kinetic assay. Mass spectrometry and NMR analysis revealed 6-carboxymethyl-3,5-dimethyl-4-hydroxy-2-pyridinol as the reaction product, which confirmed the function of HcgC.


  • Organizational Affiliation

    Max-Planck-Institut für terrestrische Mikrobiologie, Karl-von-Frisch-Straße 10, 35043, Marburg, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Uncharacterized protein MJ0489
A, B, C, D, E
A, B, C, D, E, F, G, H
268Methanocaldococcus jannaschiiMutation(s): 0 
Gene Names: MJ0489
UniProt
Find proteins for Q57913 (Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440))
Explore Q57913 
Go to UniProtKB:  Q57913
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ57913
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D, E
A, B, C, D, E, F, G, H
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.229 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 141.43α = 90
b = 145β = 90
c = 150.55γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
SHARPphasing
XDSdata reduction
PHENIXrefinement
PDB_EXTRACTdata extraction
PHENIXmodel building

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
JST-PRESTOJapan--
Max Planck SocietyGermany--

Revision History  (Full details and data files)

  • Version 1.0: 2016-07-20
    Type: Initial release
  • Version 1.1: 2016-08-10
    Changes: Database references