An iterative, bimodular nonribosomal peptide synthetase that converts anthranilate and tryptophan into tetracyclic asperlicins.
An iterative, bimodular nonribosomal peptide synthetase that converts anthranilate and tryptophan into tetracyclic asperlicins.
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DOI:
10.1016/j.chembiol.2013.04.019
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发表时间:
2013-07-25
影响因子:
--
通讯作者:
Walsh CT
中科院分区:
文献类型:
--
作者:
Gao X;Jiang W;Jiménez-Osés G;Choi MS;Houk KN;Tang Y;Walsh CT
The bimodular 276 kDa nonribosomal peptide synthetase AspA from Aspergillus alliaceus, heterologously expressed in Saccharomyces cerevisiae, converts tryptophan and two molecules of the aromatic β-amino acid anthranilate (Ant) into a pair of tetracyclic peptidyl alkaloids asperlicin C and D in a ratio of 10:1. The first module of AspA activates and processes two molecules of Ant iteratively to generate a tethered Ant-Ant-Trp-S-enzyme intermediate on module two. Release is postulated to involve tandem cyclizations, in which the first step is the macrocyclization of the linear tripeptidyl-S-enzyme, by the terminal condensation (CT) domain to generate the regioisomeric tetracyclic asperlicin scaffolds. Computational analysis of the transannular cyclization of the 11-membered macrocyclic intermediate shows that asperlicin C is the kinetically favored product due to the high stability of a conformation resembling the transition state for cyclization, while asperlicin D is thermodynamically more stable.
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影响因子:
14.8
作者:
通讯作者:
--
影响因子:
2.8
作者:
BAUSCHLICHER, CW
通讯作者:
BAUSCHLICHER, CW
DOI:
10.1073/pnas.1534873100
发表时间:
2003-10-14
影响因子:
11.1
作者:
Hur, S;Bruice, TC
通讯作者:
Bruice, TC
影响因子:
2.9
作者:
Quadri, LEN;Weinreb, PH;Walsh, CT
通讯作者:
Walsh, CT
影响因子:
--
作者:
GONZALEZ, C;SCHLEGEL, HB
通讯作者:
SCHLEGEL, HB