6HAC

Crystal structure of [Fe]-hydrogenase (Hmd) holoenzyme from Methanococcus aeolicus (open form)

• PDB DOI: https://doi.org/10.2210/pdb6HAC/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Methanococcus aeolicus Nankai-3
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2018-08-07 Released: 2019-08-28 
• Deposition Author(s): Huang, G., Wagner, T., Wodrich, M.D., Ataka, K., Bill, E., Ermler, U., Hu, X., Shima, S.
• Funding Organization(s): Max Planck Society

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.192 
• R-Value Work: 0.171 
• R-Value Observed: 0.172 

Starting Model: experimental

Literature

The atomic-resolution crystal structure of activated [Fe]-hydrogenase

Huang, G., Wagner, T., Wodrich, M.D., Ataka, K., Bill, E., Ermler, U., Hu, X., Shima, S.

(2019) Nat Catal 

• DOI: https://doi.org/10.1038/s41929-019-0289-4

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 37.92 kDa 
• Atom Count: 2,746 
• Modelled Residue Count: 342 
• Deposited Residue Count: 342 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
5,10-methenyltetrahydromethanopterin hydrogenase	A	342	Methanococcus aeolicus Nankai-3	Mutation(s): 0  Gene Names: hmd, Maeo_1025 EC: 1.12.98.2
UniProt
Find proteins for A6UVT1 (Methanococcus aeolicus (strain ATCC BAA-1280 / DSM 17508 / OCM 812 / Nankai-3)) Explore A6UVT1  Go to UniProtKB:  A6UVT1

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FE9	B [auth A]	iron-guanylyl pyridinol cofactor C21 H23 Fe N6 O13 P S AEHOAZNVUAGELD-VPXBKTNXSA-K
1PE	C [auth A]	PENTAETHYLENE GLYCOL C10 H22 O6 JLFNLZLINWHATN-UHFFFAOYSA-N
GOL	D [auth A], E [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
NA	F [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.192 
• R-Value Work: 0.171 
• R-Value Observed: 0.172 
• Space Group: I 4₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 136.985	α = 90
b = 136.985	β = 90
c = 117.317	γ = 90

Software Package:

Software Name	Purpose
BUSTER	refinement
XDS	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2019-08-28 
Deposition Author(s): Huang, G., Wagner, T., Wodrich, M.D., Ataka, K., Bill, E., Ermler, U., Hu, X., Shima, S.

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Funding Organization	Location	Grant Number
Max Planck Society	Germany	--

Revision History  

• Version 1.0: 2019-08-28
  Type: Initial release
  
• Version 1.1: 2019-09-04
  Changes: Data collection, Database references
• Version 1.2: 2024-01-17
  Changes: Data collection, Database references, Refinement description