Methane monooxygenase

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'''Methane monooxygenase''' (MMO) catalyzes the oxidation of the C-H bond of methane and other alkanes. MMO catalyzes the conversion of CH<sub>4</sub> and O<sub>2</sub> to CH<sub>3</sub>OH and H<sub>2</sub>O using NADPH as reducing agent. The '''soluble MMO (sMMO)''' has Fe-O-Fe in its active site<ref>PMID:7826011</ref> while the '''particulate MMO (pMMO)''' has Cu in it<ref>PMID:21419924</ref>. MMO is composed of 3 subunits.<br />
'''Methane monooxygenase''' (MMO) catalyzes the oxidation of the C-H bond of methane and other alkanes. MMO catalyzes the conversion of CH<sub>4</sub> and O<sub>2</sub> to CH<sub>3</sub>OH and H<sub>2</sub>O using NADPH as reducing agent. The '''soluble MMO (sMMO)''' has Fe-O-Fe in its active site<ref>PMID:7826011</ref> while the '''particulate MMO (pMMO)''' has Cu in it<ref>PMID:21419924</ref>. MMO is composed of 3 subunits.<br />
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* Subunit α is the hydroxylase and contains the di-iron active site.<br />
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* Subunit α is the hydroxylase (MMOH) and contains the di-iron active site.<br />
* Subunit β is a reductase which contains the co-factors FAD and 2Fe-2S complex.<br />
* Subunit β is a reductase which contains the co-factors FAD and 2Fe-2S complex.<br />
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* Subunit γ which is involved in coupling.<br />
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* Subunit γ is regulatory (MMOB) which is involved in coupling.<br />
MMO is found in methanotropic bacteria.
MMO is found in methanotropic bacteria.

Revision as of 09:34, 6 September 2020

Structure of methane monooxygenase α (grey and green) +β (pink and yellow) +γ (magenta and cyan) subunits complex with Fe+3 (red), Ca+2 (green) and dibromomethane (PDB code 1fz8).

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3D structures of methane monooxygenase

Updated on 06-September-2020

References

  1. ↑ Lipscomb JD. Biochemistry of the soluble methane monooxygenase. Annu Rev Microbiol. 1994;48:371-99. PMID:7826011 doi:http://dx.doi.org/10.1146/annurev.mi.48.100194.002103
  2. ↑ Miyaji A. Particulate methane monooxygenase from Methylosinus trichosporium OB3b. Methods Enzymol. 2011;495:211-25. doi: 10.1016/B978-0-12-386905-0.00014-0. PMID:21419924 doi:http://dx.doi.org/10.1016/B978-0-12-386905-0.00014-0

Proteopedia Page Contributors and Editors (what is this?)

Michal Harel

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