Structure of a Wbl protein and implications for NO sensing by M. tuberculosis.

Structure of a Wbl protein and implications for NO sensing by M. tuberculosis.
复制标题

DOI:
10.1038/s41467-017-02418-y
复制
发表时间:
2017-12-22
影响因子:
16.6
通讯作者:
Green J
Green J
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Kudhair BK;Hounslow AM;Rolfe MD;Crack JC;Hunt DM;Buxton RS;Smith LJ;Le Brun NE;Williamson MP;Green J

文献摘要

参考文献

被引文献

相似文献

结核分枝杆菌引起肺结核,每年夺去约180万人的生命。宿主一氧化氮(NO)在控制结核感染中起重要作用。结核分枝杆菌WhiB1是一种no反应型Wbl蛋白(放线菌中的铁硫蛋白于20世纪70年代首次发现)。到目前为止,Wbl蛋白的结构还不清楚。WhiB1的核磁共振结构模型表明,Wbl蛋白是由[4Fe-4S]簇连接在一起的四个螺旋束,核心是三个α-螺旋。铁硫团簇是形成具有主要sigma因子(σA)的配合物所必需的,与NO反应可使该配合物分解。WhiB1的结构表明,铁硫簇的丢失(通过亚硝基化)允许c端螺旋中带正电的残基参与DNA结合,引发包括毒力关键型ESX-1分泌系统成分在内的基因表达的重大重编程。结核分枝杆菌WhiB1是一种具有NO敏感[4Fe-4S]簇的dna结合蛋白。在这里,作者展示了WhiB1的核磁共振结构,并提出了通过亚硝基化失去铁硫簇如何影响WhiB1 DNA结合并导致转录重编程。
Mycobacterium tuberculosis causes pulmonary tuberculosis (TB) and claims ~1.8 million human lives per annum. Host nitric oxide (NO) is important in controlling TB infection. M. tuberculosis WhiB1 is a NO-responsive Wbl protein (actinobacterial iron–sulfur proteins first identified in the 1970s). Until now, the structure of a Wbl protein has not been available. Here a NMR structural model of WhiB1 reveals that Wbl proteins are four-helix bundles with a core of three α-helices held together by a [4Fe-4S] cluster. The iron–sulfur cluster is required for formation of a complex with the major sigma factor (σA) and reaction with NO disassembles this complex. The WhiB1 structure suggests that loss of the iron–sulfur cluster (by nitrosylation) permits positively charged residues in the C-terminal helix to engage in DNA binding, triggering a major reprogramming of gene expression that includes components of the virulence-critical ESX-1 secretion system. Mycobacterium tuberculosis WhiB1 is a DNA-binding protein with a NO sensitive [4Fe-4S] cluster. Here the authors present the NMR structure of WhiB1 and suggest how loss of the iron-sulfur cluster through nitrosylation affects WhiB1 DNA binding and leads to transcriptional reprogramming.
DOI: 10.1099/mic.0.28924-0
发表时间: 2006-09-01
期刊: MICROBIOLOGY-SGM
影响因子: 2.8
作者:
Agarwal, Nisheeth;Raghunand, Tirumalai R.;Bishai, William R.
通讯作者: Bishai, William R.
DOI: 10.1074/jbc.m412622200
发表时间: 2005-03-04
影响因子: 4.8
作者:
Jakimowicz, P;Cheesman, MR;Buttner, MJ
通讯作者: Buttner, MJ
DOI: 10.1099/mic.0.000257
发表时间: 2016-05-01
期刊: MICROBIOLOGY-SGM
影响因子: 2.8
作者:
Feng, Lipeng;Chen, Zhenkang;Chen, Shiyun
通讯作者: Chen, Shiyun
DOI: 10.1107/s0907444998003254
发表时间: 1998-09-01
期刊: ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
影响因子: --
作者:
Brunger, AT;Adams, PD;Warren, GL
通讯作者: Warren, GL
DOI: 10.1107/s0907444909042073
发表时间: 2010-01
期刊: Acta crystallographica. Section D, Biological crystallography
影响因子: --
作者:
Chen VB;Arendall WB 3rd;Headd JJ;Keedy DA;Immormino RM;Kapral GJ;Murray LW;Richardson JS;Richardson DC
通讯作者: Richardson DC