| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
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|
タイトル |
One fold, two functions: cytochrome P460 and cytochrome c′-β from the methanotroph Methylococcus capsulatus (Bath) |
|
言語 |
en |
| 作成者 |
Adams, Hannah R.
Krewson, Callie
Vardanega, Jenny E.
Fujii, Sotaro
Moreno, Tadeo
Chicano
Sambongi, Yoshihiro
Svistunenko, Dimitri
Paps, Jordi
Andrew, Colin R.
Hough, Michael A.
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| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
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|
権利情報 |
© The Royal Society of Chemistry 2019 |
| 権利情報 |
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権利情報 |
This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. |
| 内容記述 |
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内容記述 |
Nature is adept at utilising highly similar protein folds to carry out very different functions, yet the mechanisms by which this functional divergence occurs remain poorly characterised. In certain methanotrophic bacteria, two homologous pentacoordinate c-type heme proteins have been identified: a cytochrome P460 (cyt P460) and a cytochrome c0-b (cyt cp-b). Cytochromes P460 are able to convert hydroxylamine to nitrous oxide (N2O), a potent greenhouse gas. This reactivity is similar to that of hydroxylamine oxidoreductase (HAO), which is a key enzyme in nitrifying and methanotrophic bacteria. Cyt P460 and HAO both have unusual protein-heme cross-links, formed by a Tyr residue in HAO and a Lys in cyt P460. In contrast, cyts cp-b (the only known cytochromes c0 with a b-sheet fold) lack this crosslink and appears to be optimized for binding non-polar molecules (including NO and CO) without enzymatic conversion. Our bioinformatics analysis supports the proposal that cyt cp-b may have evolved from cyt P460 via a gene duplication event. Using high-resolution X-ray crystallography, UV-visible absorption, electron paramagnetic resonance (EPR) and resonance Raman spectroscopy, we have characterized the overall protein folding and active site structures of cyt cp-b and cyt P460 from the obligate methanotroph, Methylococcus capsulatus (Bath). These proteins display a similar b-sheet protein fold, together with a pattern of changes to the heme pocket regions and localised tertiary structure that have converted a hydroxylamine oxidizing enzyme into a gas-binding protein. Structural comparisons provide insights relevant to enzyme redesign for synthetic enzymology and engineering of gas sensor proteins. We also show the widespread occurrence of cyts cp-b and characterise their phylogeny. |
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言語 |
en |
| 内容記述 |
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内容記述タイプ |
Other |
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内容記述 |
CRA acknowledges funding from the National Science Foundation (grant MCB 1411963). TMC was supported by Leverhulme Trust award RPG-2014-355 to MAH. |
| 出版者 |
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出版者 |
Royal Society of Chemistry |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
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関連名称 |
Electronic supplementary information (ESI) available. See DOI: 10.1039/c8sc05210g |
| 関連情報 |
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識別子タイプ |
DOI |
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関連識別子 |
10.1039/C8SC05210G |
| 関連情報 |
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|
識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1039/C8SC05210G |
| 収録物識別子 |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
2041-6520 |
| 収録物識別子 |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
2041-6539 |
| 開始ページ |
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開始ページ |
3031 |
| 書誌情報 |
Chemical Science
Chemical Science
巻 10,
号 10,
p. 3031-3041,
発行日 2019-01-21
|
| 旧ID |
48209 |
ChemSci_10_3031.pdf (1.2 MB)
