Insight into Metal Removal from Peptides that Sequester Copper for Methane Oxidation.
Insight into Metal Removal from Peptides that Sequester Copper for Methane Oxidation.
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DOI:
10.1002/chem.201706035
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发表时间:
2018-03-26
期刊:
影响因子:
--
通讯作者:
Dennison C
中科院分区:
文献类型:
--
作者:
Baslé A;El Ghazouani A;Lee J;Dennison C
Methanobactins (Mbns) are modified peptides that sequester copper (Cu) methanotrophs use to oxidize methane. Limited structural information is available for this class of natural products, as is an understanding of how cells are able to utilize Mbn‐bound Cu. The crystal structure of Methylosinus sporium NR3K CuI–Mbn provides further information about the structural diversity of Mbns and the first insight into their Cu‐release mechanism. Nitrogen ligands from oxazolone and pyrazinediol rings chelate CuI along with adjacent coordinating sulfurs from thioamides. In vitro solution data are consistent with a CuI–Mbn monomer as found for previously characterized Mbns. In the crystal structure, the N‐terminal region has undergone a conformational change allowing the formation of a CuI 2–Mbn2 dimer with CuI sites bound by chelating units from adjacent chains. Such a structural alteration will facilitate CuI release from Mbns.
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