N-terminal domain of S. aureus GpsB in complex with PBP4 fragment

Experimental Data Snapshot

  • Resolution: 2.40 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.224 

wwPDB Validation   3D Report Full Report

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Staphylococcus aureus FtsZ and PBP4 bind to the conformationally dynamic N-terminal domain of GpsB.

Sacco, M.D.Hammond, L.R.Noor, R.E.Bhattacharya, D.McKnight, L.J.Madsen, J.J.Zhang, X.Butler, S.G.Kemp, M.T.Jaskolka-Brown, A.C.Khan, S.J.Gelis, I.Eswara, P.Chen, Y.

(2024) Elife 13

  • DOI: https://doi.org/10.7554/eLife.85579
  • Primary Citation of Related Structures:  
    8E2B, 8E2C

  • PubMed Abstract: 

    In the Firmicutes phylum, GpsB is a membrane associated protein that coordinates peptidoglycan synthesis with cell growth and division. Although GpsB has been studied in several bacteria, the structure, function, and interactome of Staphylococcus aureus GpsB is largely uncharacterized. To address this knowledge gap, we solved the crystal structure of the N-terminal domain of S. aureus GpsB, which adopts an atypical, asymmetric dimer, and demonstrates major conformational flexibility that can be mapped to a hinge region formed by a three-residue insertion exclusive to Staphylococci . When this three-residue insertion is excised, its thermal stability increases, and the mutant no longer produces a previously reported lethal phenotype when overexpressed in Bacillus subtilis . In S. aureus , we show that these hinge mutants are less functional and speculate that the conformational flexibility imparted by the hinge region may serve as a dynamic switch to fine-tune the function of the GpsB complex and/or to promote interaction with its various partners. Furthermore, we provide the first biochemical, biophysical, and crystallographic evidence that the N-terminal domain of GpsB binds not only PBP4, but also FtsZ, through a conserved recognition motif located on their C-termini, thus coupling peptidoglycan synthesis to cell division. Taken together, the unique structure of S. aureus GpsB and its direct interaction with FtsZ/PBP4 provide deeper insight into the central role of GpsB in S. aureus cell division.

  • Organizational Affiliation

    Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cell cycle protein GpsB
A, B
70Staphylococcus aureus subsp. aureus COLMutation(s): 0 
Gene Names: gpsBSACOL1484
Find proteins for Q2FYI5 (Staphylococcus aureus (strain NCTC 8325 / PS 47))
Explore Q2FYI5 
Go to UniProtKB:  Q2FYI5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ2FYI5
Sequence Annotations
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
PBP47Staphylococcus aureus subsp. aureus COLMutation(s): 0 
Gene Names: pbp4
Find proteins for Q2G2X6 (Staphylococcus aureus (strain NCTC 8325 / PS 47))
Explore Q2G2X6 
Go to UniProtKB:  Q2G2X6
Entity Groups  
UniProt GroupQ2G2X6
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.40 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.224 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 29.35α = 90
b = 73.76β = 103.56
c = 42.37γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
iMOSFLMdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR01 AI161762

Revision History  (Full details and data files)

  • Version 1.0: 2023-08-09
    Type: Initial release
  • Version 1.1: 2024-05-08
    Changes: Data collection, Database references