Discovery and characterization of a new family of lytic polysaccharide monooxygenases.

Discovery and characterization of a new family of lytic polysaccharide monooxygenases.
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DOI:
10.1038/nchembio.1417
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发表时间:
2014-02
影响因子:
14.8
通讯作者:
Walton, Paul H.
Walton, Paul H.
中科院分区:
生物学1区
文献类型:
--
作者:
Hemsworth, Glyn R.;Henrissat, Bernard;Davies, Gideon J.;Walton, Paul H.

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裂解多糖单加氧酶(LPMO)是近年来发现的一类能够氧化柠檬酸多糖的酶。由于它们在生物质转化,特别是在生产生物燃料方面的潜在用途,它们目前吸引了很多关注。过去的工作已经确定了这些酶的两个离散的基于序列的家族,称为AA 9(以前的GH 61)和AA 10(以前的CBM 33)。在这里,我们报告了第三个LPMO家族的发现。使用几丁质降解的范例从Aspergillusglycerin,我们表明,酶的3-D结构的共享的一些功能,前两类的LPMO,包括铜活性中心具有组氨酸支撑活性位点,但不同的是在其活性位点的细节和EPR光谱。新的AA 11家族扩展了LPMO家族,有可能拓宽潜在底物的范围和在LPMO活性位点形成的活性铜氧物种的类型。
Lytic polysaccharide mono-oxygenases (LPMOs) are a recently discovered class of enzymes capable of oxidizing recalcitrant polysaccharides. They currently attract much attention due to their potential use in biomass conversion, notably in the production of biofuels. Past work has identified two discrete sequence-based families of these enzymes termed AA9 (formerly GH61) and AA10 (formerly CBM33). Here we report the discovery of a third family of LPMOs. Using a chitin-degrading exemplar from Aspergillus oryzae, we show that the 3-D structure of the enzyme shares some features of the previous two classes of LPMOs, including a copper active centre featuring the histidine brace active site, but is distinct in terms of its active site details and its EPR spectroscopy. The new AA11 family expands the LPMO clan with the potential to broaden both the range of potential substrates and the types of reactive copper-oxygen species formed at the active site of LPMOs.
DOI: 10.1021/ja402106e
发表时间: 2013-04-24
影响因子: 15
作者:
Hemsworth, Glyn R.;Taylor, Edward J.;Kim, Robbert Q.;Gregory, Rebecca C.;Lewis, Sally J.;Turkenburg, Johan P.;Parkin, Alison;Davies, Gideon J.;Walton, Paul H.
通讯作者: Walton, Paul H.
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发表时间: 1974-01-01
影响因子: 3.9
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影响因子: 4
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影响因子: 11.1
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发表时间: 2012-11-13
影响因子: 11.1
作者:
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通讯作者: Vaaje-Kolstad, Gustav