Radical-mediated enzymatic carbon chain fragmentation-recombination.

Radical-mediated enzymatic carbon chain fragmentation-recombination.
复制标题

自由基介导的酶促碳链断裂重组

DOI:
10.1038/nchembio.512
复制
发表时间:
2011-03
影响因子:
14.8
通讯作者:
Liu, Wen
Liu, Wen
中科院分区:
生物学1区
文献类型:
--
作者:
Zhang, Qi;Li, Yuxue;Chen, Dandan;Yu, Yi;Duan, Lian;Shen, Ben;Liu, Wen

文献摘要

参考文献

被引文献

相似文献

自由基S-腺苷甲硫氨酸(S-腺苷甲硫氨酸)超家族包含数千种催化高度多样化转化的蛋白质,由于缺乏有关化学产物和自由基依赖性转化的信息,对其中大多数蛋白质知之甚少。我们在这里报告,NosL,参与形成的吲哚侧环的硫肽诺西肽(NOS),是一个自由基S-蛋氨酸3-甲基-2-吲哚酸(MIA)合酶。NosL催化L-色氨酸的碳链重组生成MIA,表现出C α-N单元的去除和羧酸酯向吲哚环的移动。在鉴定产物和推定的甘氨酰中间体后,对酶促过程进行了解剖,发现了自由基介导的不寻常的片段化重组反应。这一发现揭示了在复杂的生物转化过程中自由基S-Met酶催化的结构重排的关键步骤。此外,NosL耐受氟化L-色氨酸作为底物,允许产生在天然存在的硫肽家族的80多个成员中尚未发现的区域特异性卤化硫肽。
The radicalS-adenosylmethionine (S-AdoMet) superfamily contains thousands of proteins that catalyze highly diverse conversions, most of which are poorly understood, owing to a lack of information regarding chemical products and radical-dependent transformations. We here report that NosL, involved in forming the indole side ring of the thiopeptide nosiheptide (NOS), is a radicalS-AdoMet 3-methyl-2-indolic acid (MIA) synthase. NosL catalyzed an unprecedented carbon chain reconstitution ofL-tryptophan to give MIA, showing removal of the Cα-N unit and shift of the carboxylate to the indole ring. Dissection of the enzymatic process upon the identification of products and a putative glycyl intermediate uncovered a radical-mediated, unusual fragmentation-recombination reaction. This finding unveiled a key step in radicalS-AdoMet enzyme–catalyzed structural rearrangements during complex biotransformations. Additionally, NosL tolerated fluorinatedL-tryptophan as the substrate, allowing for production of a regiospecifically halogenated thiopeptide that has not been found among the more than 80 members of the naturally occurring thiopeptide family.
DOI: 10.1002/anie.200907047
发表时间: 2010-01-01
影响因子: 16.6
作者:
Driesener, Rebecca C.;Challand, Martin R.;Roach, Peter L.
通讯作者: Roach, Peter L.
DOI: 10.1038/nchembio.121
发表时间: 2008-12
影响因子: 14.8
作者:
Chatterjee, Abhishek;Li, Yue;Zhang, Yang;Grove, Tyler L.;Lee, Michael;Krebs, Carsten;Booker, Squire J.;Begley, Tadhg P.;Ealick, Steven E.
通讯作者: Ealick, Steven E.
DOI: 10.1021/ja900488a
发表时间: 2009-04-29
影响因子: 15
作者:
Morris, Rowan P.;Leeds, Jennifer A.;Krastel, Philipp
通讯作者: Krastel, Philipp
DOI: 10.1073/pnas.0900008106
发表时间: 2009-02-24
影响因子: 11.1
作者:
Brown, Laura C. Wieland;Acker, Michael G.;Fischbach, Michael A.
通讯作者: Fischbach, Michael A.
DOI: 10.1021/ja908777t
发表时间: 2009-12-09
影响因子: 15
作者:
Acker, Michael G.;Bowers, Albert A.;Walsh, Christopher T.
通讯作者: Walsh, Christopher T.