1X1X

Water-mediate interaction at aprotein-protein interface

• PDB DOI: https://doi.org/10.2210/pdb1X1X/pdb

• Classification: Hydrolase/Protein Binding
• Organism(s): Bacillus amyloliquefaciens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2005-04-15 Released: 2005-04-26 
• Deposition Author(s): Ikura, T., Urakubo, Y., Ito, N.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.237 
• R-Value Work: 0.191 
• R-Value Observed: 0.191 

Literature

Water-mediated interaction at a protein-protein interface

Ikura, T., Urakubo, Y., Ito, N.

(2004) Chem Phys 307: 111-119

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 2 assigned by authors.

Biological Assembly 3  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 3 assigned by authors.

Macromolecule Content

• Total Structure Weight: 67.49 kDa 
• Atom Count: 5,208 
• Modelled Residue Count: 596 
• Deposited Residue Count: 597 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Ribonuclease	A, B, C	110	Bacillus amyloliquefaciens	Mutation(s): 0  EC: 3.1.27
UniProt
Find proteins for P00648 (Bacillus amyloliquefaciens) Explore P00648  Go to UniProtKB:  P00648

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Barstar	D, E, F	89	Bacillus amyloliquefaciens	Mutation(s): 3
UniProt
Find proteins for P11540 (Bacillus amyloliquefaciens) Explore P11540  Go to UniProtKB:  P11540

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.237 
• R-Value Work: 0.191 
• R-Value Observed: 0.191 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 200.095	α = 90
b = 43.872	β = 110.32
c = 83.234	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-04-26 
Deposition Author(s): Ikura, T., Urakubo, Y., Ito, N.

Revision History  

• Version 1.0: 2005-04-26
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2021-11-10
  Changes: Database references
• Version 1.4: 2024-05-29
  Changes: Data collection