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Title: Structure and mechanism of the essential two-component signal-transduction system WalKR in Staphylococcus aureus

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms11000· OSTI ID:1247346
 [1];  [1];  [2];  [1];  [1];  [3];  [4];  [5];  [4];  [1];  [1];  [1];  [5];  [6];  [4];  [2];  [2];  [1]
  1. The Univ. of Chicago, Chicago, IL (United States)
  2. Chinese Academy of Sciences, Shanghai (China)
  3. Northwestern Univ., Argonne, IL (United States)
  4. Indiana Univ. School of Medicine-Northwest, Gary, IN (United States)
  5. Northwestern Univ., Evanston, IL (United States)
  6. Univ. of Chicago, Chicago, IL (United States)

Most low GC Gram-positive bacteria possess an essential walKR two-component system (TCS) for signal transduction involved in regulating cell wall homoeostasis. Despite the well-established intracellular regulatory mechanism, the role of this TCS in extracellular signal recognition and factors that modulate the activity of this TCS remain largely unknown. Here we identify the extracellular receptor of the kinase ‘WalK’ (erWalK) as a key hub for bridging extracellular signal input and intracellular kinase activity modulation in Staphylococcus aureus. Characterization of the crystal structure of erWalK revealed a canonical Per-Arnt-Sim (PAS) domain for signal sensing. Single amino-acid mutation of potential signal-transduction residues resulted in severely impaired function of WalKR. A small molecule derived from structure-based virtual screening against erWalK is capable of selectively activating the walKR TCS. Lastly, the molecular level characterization of erWalK will not only facilitate exploration of natural signal(s) but also provide a template for rational design of erWalK inhibitors.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1247346
Journal Information:
Nature Communications, Vol. 7; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 385 works
Citation information provided by
Web of Science

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Cited By (4)

Streptomyces as a Prominent Resource of Future Anti-MRSA Drugs journal September 2018
Staphylococcus aureus virulence attenuation and immune clearance mediated by a phage lysin‐derived protein journal July 2018
The Complex Relationship between Virulence and Antibiotic Resistance journal January 2017
Correspondence: Spontaneous secondary mutations confound analysis of the essential two component system WalKR in Staphylococcus aureus journal July 2016

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