Engineering the substrate specificity of the DhbE adenylation domain by yeast cell surface display.
Engineering the substrate specificity of the DhbE adenylation domain by yeast cell surface display.
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DOI:
10.1016/j.chembiol.2012.10.020
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发表时间:
2013-01-24
影响因子:
--
通讯作者:
Yin J
中科院分区:
文献类型:
--
作者:
Zhang K;Nelson KM;Bhuripanyo K;Grimes KD;Zhao B;Aldrich CC;Yin J
The adenylation (A) domains of nonribosomal peptide synthetases (NRPSs) activate aryl acids or amino acids to launch their transfer through the NRPS assembly line for the biosynthesis of many medicinally important natural products. In order to expand the substrate pool of NRPSs, we developed a method based on yeast cell surface display to engineer the substrate specificities of the A-domains. We acquired A-domain mutants of DhbE that have 11- and 6-fold increases in kcat/Km with nonnative substrates 3-hydroxybenzoic acid and 2-aminobenzoic acid, respectively and corresponding 3- and 33-fold decreases in kcat/Km values with the native substrate 2,3-dihydroxybenzoic acid, resulting in a dramatic switch in substrate specificity of up to 200-fold. Our study demonstrates that yeast display can be used as a high throughput selection platform to reprogram the “nonribosomal code” of A-domains.
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