9MTN | pdb_00009mtn

Crystal structure of KwaB

• PDB DOI: https://doi.org/10.2210/pdb9MTN/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2025-01-11 Released: 2025-08-06 
• Deposition Author(s): Zhiying, Z., Dinshaw, J.P.
• Funding Organization(s): Other private

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.92 Å
• R-Value Free: 
  0.275 (Depositor), 0.278 (DCC) 
• R-Value Work: 
  0.238 (Depositor), 0.243 (DCC) 
• R-Value Observed: 
  0.242 (Depositor) 

Starting Model: in silico

Literature

Crystal structure of KwaB

Zhiying, Z., Dinshaw, J.P.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content 

• Total Structure Weight: 144.59 kDa 
• Atom Count: 9,722 
• Modeled Residue Count: 1,205 
• Deposited Residue Count: 1,260 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Kiwa protein KwaB	A, B [auth K], C [auth B], D [auth C]	315	Escherichia coli	Mutation(s): 0  Gene Names: kwaB, ECO55CA74_24530
UniProt
Find proteins for P0DW46 (Escherichia coli O55:H7 (strain RM12579 / EPEC)) Explore P0DW46  Go to UniProtKB:  P0DW46

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.92 Å
• R-Value Free:  0.275 (Depositor), 0.278 (DCC) 
• R-Value Work:  0.238 (Depositor), 0.243 (DCC) 
• R-Value Observed: 0.242 (Depositor) 

Space Group: H 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 283.105	α = 90
b = 283.105	β = 90
c = 76.312	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
AUTOMAR	data reduction
Aimless	data scaling
MOLREP	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-08-06 
Deposition Author(s): Zhiying, Z., Dinshaw, J.P.

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Funding Organization	Location	Grant Number
Other private	United States	P30CA008748

Revision History  

• Version 1.0: 2025-08-06
  Type: Initial release