Crystal structures of Magnaporthe oryzae trehalose-6-phosphate synthase (MoTps1) suggest a model for catalytic process of Tps1.
Crystal structures of Magnaporthe oryzae trehalose-6-phosphate synthase (MoTps1) suggest a model for catalytic process of Tps1.
复制标题
Magnaporthe oryzae 海藻糖 6-磷酸合酶 (MoTps1) 的晶体结构提出了 Tps1 催化过程的模型。
DOI:
10.1042/bcj20190289
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发表时间:
2019-11
影响因子:
4.1
通讯作者:
Liu Junfeng
中科院分区:
文献类型:
--
作者:
Wang Shanshan;Zhao Yanxiang;Yi Long;Shen Minghe;Wang Chao;Zhang Xin;Yang Jun;Peng You Liang;Wang Dongli;Liu Junfeng
Trehalose-6-phosphate (T6P) synthase (Tps1) catalyses the formation of T6P from UDP-glucose (UDPG) (or GDPG, etc.) and glucose-6-phosphate (G6P), and structural basis of this process has not been well studied. MoTps1 ( Magnaporthe oryzae Tps1) plays critical role in carbon and nitrogen metabolism, but its structural information is unknown. Here we present the crystal structures of MoTps1 apo, binary (with UDPG) and ternary (with UDPG/G6P or UDP/T6P) complexes. MoTps1 consists of two modified Rossmann-fold domains and a catalytic center in-between. Unlike Escherichia coli OtsA (EcOtsA, the Tps1 of E. coli ), MoTps1 exists as a mixture of monomer, dimer, and oligomer in solution. Inter-chain salt bridges, which are not fully conserved in EcOtsA, play primary role in MoTps1 oligomerization. Binding of UDPG by MoTps1 C-terminal domain modifies the substrate pocket of MoTps1. In the MoTps1 ternary complex structure, UDP and T6P, the products of UDPG and G6P, are detected, and substantial conformational rearrangements of N-terminal domain, including structural reshuffling (β3-β4 loop to α0 helix) and movement of a "shift region" towards the catalytic centre, are observed. These conformational changes render MoTps1 to a "closed" state compared with its "open" state in apo or UDPG complex structures. By solving the EcOtsA apo structure, we also confirmed that similar ligand binding induced conformational changes also exist in EcOtsA, although no structural reshuffling involved. Based on our research and previous studies, we present a model for the catalytic process of Tps1. Our research provides novel information on MoTps1, Tps1 family, and structure based antifungal drug design.
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影响因子:
4.5
作者:
Fernandez J;Wright JD;Hartline D;Quispe CF;Madayiputhiya N;Wilson RA
通讯作者:
Wilson RA
影响因子:
14.8
作者:
Giganti, David;Albesa-Jove, David;Alzari, Pedro M.
通讯作者:
Alzari, Pedro M.
影响因子:
4.8
作者:
Gibson, RP;Tarling, CA;Davies, GJ
通讯作者:
Davies, GJ
DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH
DOI:
--
发表时间:
2002
期刊:
--
影响因子:
--
作者:
W. Delano
通讯作者:
W. Delano