3VTI

Crystal structure of HypE-HypF complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.56 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis for the reaction mechanism of S-carbamoylation of HypE by HypF in the maturation of [NiFe]-hydrogenases

Shomura, Y.Higuchi, Y.

(2012) J.Biol.Chem. 287: 28409-28419

  • DOI: 10.1074/jbc.M112.387134
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • As a remarkable structural feature of hydrogenase active sites, [NiFe]-hydrogenases harbor one carbonyl and two cyano ligands, where HypE and HypF are involved in the biosynthesis of the nitrile group as a precursor of the cyano groups. HypF catalyze ...

    As a remarkable structural feature of hydrogenase active sites, [NiFe]-hydrogenases harbor one carbonyl and two cyano ligands, where HypE and HypF are involved in the biosynthesis of the nitrile group as a precursor of the cyano groups. HypF catalyzes S-carbamoylation of the C-terminal cysteine of HypE via three steps using carbamoylphosphate and ATP, producing two unstable intermediates: carbamate and carbamoyladenylate. Although the crystal structures of intact HypE homodimers and partial HypF have been reported, it remains unclear how the consecutive reactions occur without the loss of unstable intermediates during the proposed reaction scheme. Here we report the crystal structures of full-length HypF both alone and in complex with HypE at resolutions of 2.0 and 2.6 Å, respectively. Three catalytic sites of the structures of the HypF nucleotide- and phosphate-bound forms have been identified, with each site connected via channels inside the protein. This finding suggests that the first two consecutive reactions occur without the release of carbamate or carbamoyladenylate from the enzyme. The structure of HypF in complex with HypE revealed that HypF can associate with HypE without disturbing its homodimeric interaction and that the binding manner allows the C-terminal Cys-351 of HypE to access the S-carbamoylation active site in HypF, suggesting that the third step can also proceed without the release of carbamoyladenylate. A comparison of the structure of HypF with the recently reported structures of O-carbamoyltransferase revealed different reaction mechanisms for carbamoyladenylate synthesis and a similar reaction mechanism for carbamoyltransfer to produce the carbamoyl-HypE molecule.


    Organizational Affiliation

    Department of Life Science, Graduate School of Life Science, University of Hyogo, Hyogo 678-1297, Japan. shomura@sci.u-hyogo.ac.jp




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Hydrogenase maturation factor
A, B
761Caldanaerobacter subterraneus subsp. tengcongensis (strain DSM 15242 / JCM 11007 / NBRC 100824 / MB4)Mutation(s): 0 
Gene Names: HypF
EC: 6.2.-.-
Find proteins for Q8RDB0 (Caldanaerobacter subterraneus subsp. tengcongensis (strain DSM 15242 / JCM 11007 / NBRC 100824 / MB4))
Go to UniProtKB:  Q8RDB0
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Hydrogenase maturation factor
C, D
314Caldanaerobacter subterraneus subsp. tengcongensis (strain DSM 15242 / JCM 11007 / NBRC 100824 / MB4)Mutation(s): 0 
Gene Names: HypE
Find proteins for Q8RDA7 (Caldanaerobacter subterraneus subsp. tengcongensis (strain DSM 15242 / JCM 11007 / NBRC 100824 / MB4))
Go to UniProtKB:  Q8RDA7
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
C, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
FE
Query on FE

Download SDF File 
Download CCD File 
A, B
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.56 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.206 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 118.739α = 90.00
b = 119.101β = 90.00
c = 174.631γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
BSSdata collection
MOLREPphasing
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-07-04
    Type: Initial release
  • Version 1.1: 2013-08-07
    Type: Database references