Chemistry and biology of the copper chelator methanobactin.

Chemistry and biology of the copper chelator methanobactin.
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DOI:
10.1021/cb2003913
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发表时间:
2012-02-17
影响因子:
4
通讯作者:
Rosenzweig, Amy C.
Rosenzweig, Amy C.
中科院分区:
生物学2区
文献类型:
--
作者:
Kenney, Grace E.;Rosenzweig, Amy C.

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甲烷营养菌是一种氧化甲烷的生物体,会产生一种称为甲烷菌素 (Mb) 的小铜螯合分子。 Mb 以高亲和力结合 Cu(I),并推测可介导从环境中获取铜。 Mb 表征的最新进展包括对毛孢甲基窦菌 OB3b 中 Mb 的化学结构进行修订,并进一步研究其生物物理特性。此外,还对其他几种甲烷氧化菌菌株的 Mb 生产进行了研究,初步表征表明化学成分存在多样性。通过鉴定毛孢分枝杆菌 OB3b 基因组中的假定前体基因,获得了 Mb 生物合成的初步线索。最后,已证明完整的 Mb 可以直接摄取到毛孢分枝杆菌 OB3b 细胞的细胞质中,并已启动了转运机制的研究。总而言之,这些进展代表了重大进展,并为令人兴奋的新研究方向奠定了基础。
Methanotrophic bacteria, organisms that oxidize methane, produce a small copper chelating molecule called methanobactin (Mb). Mb binds Cu(I) with high affinity and is hypothesized to mediate copper acquisition from the environment. Recent advances in Mb characterization include revision of the chemical structure of Mb from Methylosinus trichosporium OB3b and further investigation of its biophysical properties. In addition, Mb production by several other methanotroph strains has been investigated and preliminary characterization suggests diversity in chemical composition. Initial clues into Mb biosynthesis have been obtained by identification of a putative precursor gene in the M. trichosporium OB3b genome. Finally, direct uptake of intact Mb into the cytoplasm of M. trichosporium OB3b cells has been demonstrated and studies of the transport mechanism have been initiated. Taken together, these advances represent significant progress and set the stage for exciting new research directions.
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