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3f47
From Proteopedia
| 3f47, resolution 1.75Å () | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Sites: | , , , and | ||||||||
| Ligands: | , , , | ||||||||
| Gene: | hmd, MJ0784 (Methanocaldococcus jannaschii) | ||||||||
| Activity: | 5,10-methenyltetrahydromethanopterin hydrogenase, with EC number 1.12.98.2 | ||||||||
| Related: | 2b0j, 3dag, 3daf, 3f46
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||
Contents |
The Crystal Structure of [Fe]-Hydrogenase (Hmd) Holoenzyme from Methanocaldococcus jannaschii
[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
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
About this Structure
3f47 is a 1 chain structure with sequence from Methanocaldococcus jannaschii. The March 2009 RCSB PDB Molecule of the Month feature on Hydrogenase by David Goodsell is 10.2210/rcsb_pdb/mom_2009_3. Full crystallographic information is available from OCA.
See Also
Reference
- 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:10.1016/j.febslet.2009.01.017
Categories: 5,10-methenyltetrahydromethanopterin hydrogenase | Hydrogenase | Methanocaldococcus jannaschii | RCSB PDB Molecule of the Month | Ermler, U. | Hiromoto, T. | Pilak, O. | Shima, S. | Thauer, R K. | Warkentin, E. | Complex with iron guanylyl pyridinol cofactor | Helix bundle | Methanogenesis | One-carbon metabolism | Oxidoreductase | Rossmann fold
