Backbone assignments and conformational dynamics in the S. typhimurium tryptophan synthase α-subunit from solution-state NMR
Backbone assignments and conformational dynamics in the S. typhimurium tryptophan synthase α-subunit from solution-state NMR
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溶液态 NMR 中鼠伤寒沙门氏菌色氨酸合酶 α 亚基的主链分配和构象动力学
DOI:
10.1007/s10858-020-00320-2
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发表时间:
2020
影响因子:
2.7
通讯作者:
Mueller, Leonard J.
中科院分区:
文献类型:
--
作者:
Sakhrani, Varun V.;Hilario, Eduardo;Caulkins, Bethany G.;Hatcher-Skeers, Mary E.;Fan, Li;Dunn, Michael F.;Mueller, Leonard J.
Backbone assignments for the isolated α-subunit ofSalmonella typhimuriumtryptophan synthase (TS) are reported based on triple resonance solution-state NMR experiments on a uniformly2H,13C,15N-labeled sample. From the backbone chemical shifts, secondary structure and random coil index order parameters (RCI-S2) are predicted. Titration with the 3-indole-d-glycerol 3′-phosphate analog, N-(4′-trifluoromethoxybenzenesulfonyl)-2-aminoethyl phosphate (F9), leads to chemical shift perturbations indicative of conformational changes from which an estimate of the dissociation constant is obtained. Comparisons of the backbone chemical-shifts, RCI-S2values, and site-specific relaxation times with and without F9 reveal allosteric changes including modulation in secondary structures and loop rigidity induced upon ligand binding. A comparison is made to the X-ray crystal structure of the α-subunit in the full TS αββα bi-enzyme complex and to two new X-ray crystal structures of the isolated TS α-subunit reported in this work.
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影响因子:
2.9
作者:
Ngo, Huu;Kimmich, Novelle;Dunn, Michael F.
通讯作者:
Dunn, Michael F.
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
T. Seifert;P. Bartholmes;R. Jaenicke
通讯作者:
R. Jaenicke
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
--
DOI:
10.1016/s0021-9258(18)42377-0
发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
P. Brzovic;Y. Sawa;C. Hyde;E. W. Miles;M. Dunn
通讯作者:
M. Dunn
影响因子:
1.6
作者:
Xiang;S. Ruvinov;E. W. Miles
通讯作者:
E. W. Miles