Structure of a modular polyketide synthase.
Structure of a modular polyketide synthase.
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DOI:
10.1038/nature13423
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发表时间:
2014-06-26
期刊:
影响因子:
64.8
通讯作者:
Skiniotis, Georgios
中科院分区:
文献类型:
--
作者:
Dutta, Somnath;Whicher, Jonathan R.;Hansen, Douglas A.;Hale, Wendi A.;Chemler, Joseph A.;Congdon, Grady R.;Narayan, Alison R. H.;Hakansson, Kristina;Sherman, David H.;Smith, Janet L.;Skiniotis, Georgios
Polyketide natural products constitute a broad class of compounds with diverse structural features and biological activities. Their biosynthetic machinery, represented by type I polyketide synthases, has an architecture in which successive modules catalyze two-carbon linear extensions and keto group processing reactions on intermediates covalently tethered to carrier domains. We employed electron cryo-microscopy to visualize a full-length module and determine sub-nanometer resolution 3D reconstructions that revealed an unexpectedly different architecture compared to the homologous dimeric mammalian fatty acid synthase. A single reaction chamber provides access to all catalytic sites for the intra-module carrier domain. In contrast, the carrier from the preceding module uses a separate entrance outside the reaction chamber to deliver the upstream polyketide intermediate for subsequent extension and modification. This study reveals for the first time the structural basis for both intra-module and inter-module substrate transfer in polyketide synthases, and establishes a new model for molecular dissection of these multifunctional enzyme systems.
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影响因子:
64.8
作者:
通讯作者:
--
DOI:
10.1016/j.str.2009.10.018
发表时间:
2010-01-13
期刊:
Structure (London, England : 1993)
影响因子:
--
作者:
Akey DL;Razelun JR;Tehranisa J;Sherman DH;Gerwick WH;Smith JL
通讯作者:
Smith JL
影响因子:
--
作者:
Broadhurst, RW;Nietlispach, D;Weissman, KJ
通讯作者:
Weissman, KJ
影响因子:
--
作者:
Bonnett SA;Rath CM;Shareef AR;Joels JR;Chemler JA;Håkansson K;Reynolds K;Sherman DH
通讯作者:
Sherman DH
影响因子:
15
作者:
Hansen, Douglas A.;Rath, Christopher M.;Eisman, Eli B.;Narayan, Alison R. H.;Kittendorf, Jeffrey D.;Mortison, Jonathan D.;Yoon, Yeo Joon;Sherman, David H.
通讯作者:
Sherman, David H.