Structural basis for persulfide-sensing specificity in a transcriptional regulator.
Structural basis for persulfide-sensing specificity in a transcriptional regulator.
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转录调节剂中硫化物感应特异性的结构基础。
DOI:
10.1038/s41589-020-00671-9
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发表时间:
2021-01
影响因子:
14.8
通讯作者:
Giedroc DP
中科院分区:
文献类型:
--
作者:
Capdevila DA;Walsh BJC;Zhang Y;Dietrich C;Gonzalez-Gutierrez G;Giedroc DP
Cysteine thiol-based transcriptional regulators orchestrate the coordinated regulation of redox homeostasis and other cellular processes by ‘sensing’ or detecting a specific redox-active molecule, which in turn activates the transcription of a specific detoxification pathway. The extent to which these sensors are truly specific in cells for a singular class of reactive small-molecule stressors, for example, reactive oxygen or sulfur species, is largely unknown. Here, we report structural and mechanistic insights into the thiol-based transcriptional repressor SqrR, which reacts exclusively with oxidized sulfur species such as persulfides, to yield a tetrasulfide bridge that inhibits DNA operator–promoter binding. Evaluation of crystallographic structures of SqrR in various derivatized states, coupled with the results of a mass spectrometry-based kinetic profiling strategy, suggest that persulfide selectivity is determined by structural frustration of the disulfide form. These findings led to the identification of an uncharacterized repressor from the bacterial pathogen Acinetobacter baumannii as a persulfide sensor.
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影响因子:
14.9
作者:
Parra RG;Schafer NP;Radusky LG;Tsai MY;Guzovsky AB;Wolynes PG;Ferreiro DU
通讯作者:
Ferreiro DU
影响因子:
2.9
作者:
Apuy, JL;Busenlehner, LS;Giedroc, DP
通讯作者:
Giedroc, DP
影响因子:
3.2
作者:
Gristwood, Tamzin;McNeil, Matthew B;Fineran, Peter C
通讯作者:
Fineran, Peter C
影响因子:
8.4
作者:
Glauninger H;Zhang Y;Higgins KA;Jacobs AD;Martin JE;Fu Y;Coyne Rd HJ;Bruce KE;Maroney MJ;Clemmer DE;Capdevila DA;Giedroc DP
通讯作者:
Giedroc DP
影响因子:
0.9
作者:
Arunkumar, Alphonse I.;Pennella, Mario A.;Giedroc, David P.
通讯作者:
Giedroc, David P.