Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 57.69 kDa 
• Atom Count: 4,088 
• Modelled Residue Count: 472 
• Deposited Residue Count: 500 
• Unique protein chains: 1

 6E52

Chimeric structure of Saccharomyces cerevisiae GCN4 leucine zipper fused to Staphylococcus aureus AgrC cytoplasmic histidine kinase module (dataset anisotropically truncated by STARANISO)

• PDB DOI: 10.2210/pdb6E52/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Saccharomyces cerevisiae S288C, Staphylococcus aureus subsp. aureus Z172
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2018-07-19 Released: 2019-02-27 
• Deposition Author(s): Xie, Q., Jeffrey, P.D., Muir, T.W.
• Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID), National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.93 Å
• R-Value Free: 0.268 
• R-Value Work: 0.218 
• R-Value Observed: 0.221 

Literature

Identification of a Molecular Latch that Regulates Staphylococcal Virulence.

Xie, Q., Zhao, A., Jeffrey, P.D., Kim, M.K., Bassler, B.L., Stone, H.A., Novick, R.P., Muir, T.W.

(2019) Cell Chem Biol 26: 548-558.e4

• PubMed: 30773482 
• DOI: 10.1016/j.chembiol.2019.01.006
• Primary Citation of Related Structures:  
  6E52, 6E95


• PubMed Abstract: 
  

Virulence induction in the Staphylococcus aureus is under the control of a quorum sensing (QS) circuit encoded by the accessory gene regulator (agr) locus. Allelic variation within agr produces four QS specificity groups, each producing a unique secreted autoinducer peptide (AIP) and receptor histidine kinase (RHK), AgrC. Cognate AIP-AgrC interactions activate virulence through a two-component signaling cascade, whereas non-cognate pairs are generally inhibitory. Here we pinpoint a key hydrogen-bonding interaction within AgrC that acts as a switch to convert helical motions propagating from the receptor sensor domain into changes in inter-domain association within the kinase module. AgrC mutants lacking this interaction are constitutively active in vitro and in vivo, the latter leading to a pronounced attenuation of S. aureus biofilm formation. Thus, our work sheds light on the regulation of this biomedically important RHK.

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Organizational Affiliation: 

Department of Chemistry, Princeton University, Frick Chemistry Laboratory, Washington Road, Princeton, NJ 08544-0015, USA. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Staphylococcus aureus AgrC histidine kinase module fused to Saccharomyces cerevisiae GCN4 leucine zipper	A, B	250	Saccharomyces cerevisiae S288C, Staphylococcus aureus subsp. aureus Z172 This entity is chimeric	Mutation(s): 0  Gene Names: GCN4, AAS3, ARG9, YEL009C, agrC, SAZ172_2038
UniProt
Find proteins for P03069 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P03069  Go to UniProtKB:  P03069

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.93 Å
• R-Value Free: 0.268 
• R-Value Work: 0.218 
• R-Value Observed: 0.221 
• Space Group: P 2 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 63.141	α = 90
b = 83.375	β = 90
c = 146.966	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data collection
HKL-2000	data reduction
SCALEPACK	data scaling
PHASER	phasing
Coot	model building

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2019-02-27 
Deposition Author(s): Xie, Q., Jeffrey, P.D., Muir, T.W.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	AI042783
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM095880

Revision History  

• Version 1.0: 2019-02-27
  Type: Initial release
  
• Version 1.1: 2019-03-06
  Changes: Data collection, Database references
• Version 1.2: 2019-05-01
  Changes: Data collection, Database references
• Version 1.3: 2019-12-18
  Changes: Author supporting evidence