Ahn, Dae-Ro Song, HyoJin Kim, Jowon Lee, Soyoung Park, SangYoun 2024-01-20T13:00:42Z 2024-01-20T13:00:42Z 2021-09-01 2013-03 0141-8130 https://pubs.kist.re.kr/handle/201004/128305 In bacterial chemotaxis, the levels of phosphorylated CheY in association with FliM determine the sense of the flagella rotation, which in turn controls the bacterial swimming behavior. We report the 1.7 angstrom resolution crystallographic structure of the Thermotoga maritima BeF3--activated CheY in complex with the CheY-binding N-terminal region of FliM. Analysis of the structure in comparison to the previously reported Escherichia coli counterpart reveals that similar regions of H4-beta 5-H5 in CheY and the helix in FliM are used for the complex interfaces. Our structure also indicates that the correlated movement of Phe101 and Ser82 (F-S coupling) in T. maritima CheY upon phosphorylation and FliM binding, parallels that of Tyr106 and Thr87 (Y-T coupling) demonstrated in E. coli CheY. Furthermore, significant displacements of the beta 4-H4 loop in both CheYs impose a crucial role of this loop, which can be related to flagellar switch component binding or to propagating changes that is necessary during the CheY-mediated reversal of the motor. (c) 2012 Elsevier B.V. All rights reserved. English ELSEVIER FLAGELLAR SWITCH PROTEIN RESPONSE REGULATOR BINDING DOMAIN BACTERIAL PHOSPHORYLATION COMPLEX The crystal structure of an activated Thermotoga maritima CheY with N-terminal region of FliM Article 10.1016/j.ijbiomac.2012.12.003 1 INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, v.54, pp.76 - 83 INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES 54 76 83 scie scopus 000315746400012 2-s2.0-84871878701 Biochemistry & Molecular Biology Chemistry, Applied Polymer Science Biochemistry & Molecular Biology Chemistry Polymer Science Article FLAGELLAR SWITCH PROTEIN RESPONSE REGULATOR BINDING DOMAIN BACTERIAL PHOSPHORYLATION COMPLEX CheY FliM Protein-protein interaction Thermotoga maritima