3f46

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The Crystal Structure of C176A Mutated [Fe]-Hydrogenase (Hmd) Holoenzyme from Methanocaldococcus jannaschii

Structural highlights

3f46 is a 1 chain structure with sequence from Methanocaldococcus jannaschii. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.95Å
Ligands:CMO, DTV, FE2, I2C
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

HMD_METJA Catalyzes the reversible reduction of methenyl-H(4)MPT(+) to methylene-H(4)MPT (By similarity).

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

[Fe]-hydrogenase is one of three types of enzymes known to activate H(2). Crystal structure analysis recently revealed that its active site iron is ligated square-pyramidally by Cys176-sulfur, two CO, an "unknown" ligand and the sp(2)-hybridized nitrogen of a unique iron-guanylylpyridinol-cofactor. We report here on the structure of the C176A mutated enzyme crystallized in the presence of dithiothreitol (DTT). It suggests an iron center octahedrally coordinated by one DTT-sulfur and one DTT-oxygen, two CO, the 2-pyridinol's nitrogen and the 2-pyridinol's 6-formylmethyl group in an acyl-iron ligation. This result led to a re-interpretation of the iron ligation in the wild-type.

The crystal structure of C176A mutated [Fe]-hydrogenase suggests an acyl-iron ligation in the active site iron complex.,Hiromoto T, Ataka K, Pilak O, Vogt S, Stagni MS, Meyer-Klaucke W, Warkentin E, Thauer RK, Shima S, Ermler U FEBS Lett. 2009 Feb 4;583(3):585-90. Epub 2009 Jan 20. PMID:19162018[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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Citations
16 reviews cite this structure
Radical S-adenosylmethionine enzymes.
Broderick et al. (2014)
15 more
58 other articles
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References

  1. ↑ Hiromoto T, Ataka K, Pilak O, Vogt S, Stagni MS, Meyer-Klaucke W, Warkentin E, Thauer RK, Shima S, Ermler U. The crystal structure of C176A mutated [Fe]-hydrogenase suggests an acyl-iron ligation in the active site iron complex. FEBS Lett. 2009 Feb 4;583(3):585-90. Epub 2009 Jan 20. PMID:19162018 doi:http://dx.doi.org/10.1016/j.febslet.2009.01.017

Contents


PDB ID 3f46

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