9KU0 | pdb_00009ku0

Crystal structure of CtpA F105R mutant from Helicobacter pylori

• PDB DOI: https://doi.org/10.2210/pdb9KU0/pdb

• Classification: HYDROLASE
• Organism(s): Helicobacter pylori G27
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2024-12-03 Released: 2025-12-03 
• Deposition Author(s): Sun, K., Au, S.W.N.
• Funding Organization(s): The University Grants Committee, Research Grants Council (RGC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.70 Å
• R-Value Free: 
  0.312 (Depositor), 0.311 (DCC) 
• R-Value Work: 
  0.242 (Depositor), 0.242 (DCC) 
• R-Value Observed: 
  0.246 (Depositor) 

Starting Model: experimental

Literature

Crystal structure of CtpA F105R mutant from Helicobacter pylori

Sun, K., Au, S.W.N.

To be published.

Biological Assembly 1  

Global Symmetry: Dihedral - D3  (Explore in 3D)
Global Stoichiometry: Homo 6-mer - A6 

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

Biological Assembly Evidence: electron microscopy

Biological Assembly 2  

Global Symmetry: Dihedral - D3  (Explore in 3D)
Global Stoichiometry: Homo 6-mer - A6 

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 184.51 kDa 
• Atom Count: 11,012 
• Modeled Residue Count: 1,433 
• Deposited Residue Count: 1,664 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Carboxyl-terminal protease	A, B, C, D	416	Helicobacter pylori G27	Mutation(s): 1  Gene Names: HPG27_1298
UniProt
Find proteins for B5Z8Z7 (Helicobacter pylori (strain G27)) Explore B5Z8Z7  Go to UniProtKB:  B5Z8Z7

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.70 Å
• R-Value Free:  0.312 (Depositor), 0.311 (DCC) 
• R-Value Work:  0.242 (Depositor), 0.242 (DCC) 
• R-Value Observed: 0.246 (Depositor) 

Space Group: H 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 139.331	α = 90
b = 139.331	β = 90
c = 252.092	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
MOSFLM	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-12-03 
Deposition Author(s): Sun, K., Au, S.W.N.

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Funding Organization	Location	Grant Number
The University Grants Committee, Research Grants Council (RGC)	Hong Kong	14117622

Revision History  

• Version 1.0: 2025-12-03
  Type: Initial release