Solution structures and backbone dynamics of a flavodoxin MioC from   Escherichia coli in both apo- and holo-forms - Implications for cofactor   binding and electron transfer

doi:10.1074/jbc.M607336200

CORC > 北京大学 > 化学与分子工程学院

	Solution structures and backbone dynamics of a flavodoxin MioC from Escherichia coli in both apo- and holo-forms - Implications for cofactor binding and electron transfer
	Hu, Yunfei ; Li, You ; Zhang, Xinxin ; Guo, Xianrong ; Xia, Bin ; Jin, Changwen
刊名	journal of biological chemistry
	2006
关键词	CLOSTRIDIUM-BEIJERINCKII FLAVODOXIN DESULFOVIBRIO-VULGARIS FLAVODOXIN OXIDATION-REDUCTION POTENTIALS MAGNETIC-RESONANCE RELAXATION DEPENDENT METHIONINE SYNTHASE TORSION ANGLE DYNAMICS N-15 NMR RELAXATION MODEL-FREE APPROACH ACTIVITY IN-VITRO FLAVIN MONONUCLEOTIDE
DOI	10.1074/jbc.M607336200
英文摘要	Flavodoxins play central roles in the electron transfer involving various biological processes in microorganisms. The mioC gene of Escherichia coli encodes a 16-kDa flavodoxin and locates next to the chromosomal replication initiation origin (oriC). Extensive researches have been carried out to investigate the relationship between mioC transcription and replication initiation. Recently, the MioC protein was proposed to be essential for the biotin synthase activity in vitro. Nevertheless, the exact role of MioC in biotin synthesis and its physiological function in vivo remain elusive. In order to understand the molecular basis of the biological functions of MioC and the cofactor-binding mechanisms of flavodoxins, we have determined the solution structures of both the apo- and holo-forms of E. coli MioC protein at high resolution by nuclear magnetic resonance spectroscopy. The overall structures of both forms consist of an alpha/beta sandwich, which highly resembles the classical flavodoxin fold. However, significant diversities are observed between the two forms, especially the stabilization of the FMN-binding loops and the notable extension of secondary structures upon FMN binding. Structural comparison reveals fewer negative charged and aromatic residues near the FMN-binding site of MioC, as compared with that of flavodoxin 1 from E. coli, which may affect both the redox potentials and the redox partner interactions. Furthermore, the backbone dynamics studies reveal the conformational flexibility at different time scales for both apo- and holo-forms of MioC, which may play important roles for cofactor binding and electron transfer.; Biochemistry & Molecular Biology; SCI(E); EI; PubMed; 11; ARTICLE; 46; 35454-35466; 281
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/345762]
专题	化学与分子工程学院生命科学学院
推荐引用方式 GB/T 7714	Hu, Yunfei,Li, You,Zhang, Xinxin,et al. Solution structures and backbone dynamics of a flavodoxin MioC from Escherichia coli in both apo- and holo-forms - Implications for cofactor binding and electron transfer[J]. journal of biological chemistry,2006.
APA	Hu, Yunfei,Li, You,Zhang, Xinxin,Guo, Xianrong,Xia, Bin,&Jin, Changwen.(2006).Solution structures and backbone dynamics of a flavodoxin MioC from Escherichia coli in both apo- and holo-forms - Implications for cofactor binding and electron transfer.journal of biological chemistry.
MLA	Hu, Yunfei,et al."Solution structures and backbone dynamics of a flavodoxin MioC from Escherichia coli in both apo- and holo-forms - Implications for cofactor binding and electron transfer".journal of biological chemistry (2006).