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.
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DOI:
10.1038/s41467-017-02418-y
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发表时间:
2017-12-22
影响因子:
16.6
通讯作者:
Green J
中科院分区:
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
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.
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影响因子:
2.8
作者:
Agarwal, Nisheeth;Raghunand, Tirumalai R.;Bishai, William R.
通讯作者:
Bishai, William R.
影响因子:
4.8
作者:
Jakimowicz, P;Cheesman, MR;Buttner, MJ
通讯作者:
Buttner, MJ
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