9PV2 | pdb_00009pv2

Structure of S. aureus GpsB N-terminal domain

• PDB DOI: https://doi.org/10.2210/pdb9PV2/pdb

• Classification: CELL CYCLE
• Organism(s): Staphylococcus aureus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2025-07-31 Released: 2025-10-01 
• Deposition Author(s): Nicely, N.I., Baker, R.W., Bartlett, T.M.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 
  0.236 (Depositor), 0.236 (DCC) 
• R-Value Work: 
  0.198 (Depositor), 0.198 (DCC) 
• R-Value Observed: 
  0.201 (Depositor) 

Starting Model: experimental

Literature

X-Ray Crystal Structure of the N-Terminal Domain of Staphylococcus Aureus Cell-Cycle Protein GpsB.

Nicely, N.I., Bartlett, T.M., Baker, R.W.

(2025) Crystals (Basel) 15

• PubMed: 41658510 
• DOI: https://doi.org/10.3390/cryst15100867
• Primary Citation Related Structures: 
  9PV2


• PubMed Abstract: 
  

  GpsB is a conserved cell-cycle regulator in the Firmicute clade of Gram-positive bacteria that coordinates multiple aspects of envelope biogenesis. Recent studies demonstrate interactions between GpsB and the key division cytoskeleton FtsZ, suggesting that GpsB links cell division to various aspects of cell envelope biogenesis in Staphylococcus aureus and potentially other Firmicutes. We determined a 1.7 Å resolution crystal structure of the N-terminal domain of Staphylococcus aureus GpsB, revealing an asymmetric dimer with a bent conformation. This conformation is nearly identical to one of two conformations reported by Sacco, et al., confirming the unique conformation of S. aureus GpsB compared to other gram-positive bacteria. This structural agreement provides strong validation of the S. aureus GpsB fold and supports its proposed role in organizing the cell division machinery.

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Organizational Affiliation: 
• Department of Pharmacology, UNC Chapel Hill School of Medicine; Chapel Hill, NC 27599, USA.
Division of Genetics. Wadsworth Center, New York State Department of Health; Albany, NY 12208, USA.
Department of Biochemistry and Biophysics, UNC Chapel Hill School of Medicine; Chapel Hill, NC 27599, USA.
UNC Lineberger Comprehensive Cancer Center. UNC Chapel Hill School of Medicine; Chapel Hill, NC 27599, USA.

Biological Assembly 1  

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

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

Macromolecule Content 

• Total Structure Weight: 17.74 kDa 
• Atom Count: 1,369 
• Modeled Residue Count: 146 
• Deposited Residue Count: 150 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cell cycle protein GpsB	A, B	75	Staphylococcus aureus	Mutation(s): 0  Gene Names: gpsB, SAOUHSC_01462
UniProt
Find proteins for Q2FYI5 (Staphylococcus aureus (strain NCTC 8325 / PS 47)) Explore Q2FYI5  Go to UniProtKB:  Q2FYI5

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free:  0.236 (Depositor), 0.236 (DCC) 
• R-Value Work:  0.198 (Depositor), 0.198 (DCC) 
• R-Value Observed: 0.201 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 38.373	α = 90
b = 55.531	β = 90
c = 77.077	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2025-10-01 
Deposition Author(s): Nicely, N.I., Baker, R.W., Bartlett, T.M.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2025-10-01
  Type: Initial release
  
• Version 1.1: 2026-10-14
  Changes: Database references