9RMM | pdb_00009rmm

Crystal structure of outer membrane SilC

• PDB DOI: https://doi.org/10.2210/pdb9RMM/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Salmonella enterica subsp. enterica serovar Typhimurium
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2025-06-18 Released: 2025-07-23 
• Deposition Author(s): Lithgo, R.M., Carr, S.B., Quigley, A.M., Scott, D.J.
• Funding Organization(s): Wellcome Trust, Biotechnology and Biological Sciences Research Council (BBSRC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 
  0.284 (Depositor), 0.284 (DCC) 
• R-Value Work: 
  0.237 (Depositor), 0.237 (DCC) 
• R-Value Observed: 
  0.239 (Depositor) 

Starting Model: experimental

Literature

Structural characterisation of the outer membrane protein SilC, involved in bacterial silver resistance.

Lithgo, R.M., Carr, S.B., Quigley, A.M., Scott, D.J.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C3  (Explore in 3D)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

Global Symmetry: Cyclic - C3  (Explore in 3D)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 2 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 307.91 kDa 
• Atom Count: 20,536 
• Modeled Residue Count: 2,620 
• Deposited Residue Count: 2,773 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Probable outer membrane lipoprotein SilC	A, B, D, E, F	462	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0  Gene Names: silC
UniProt
Find proteins for Q9ZHD2 (Salmonella typhimurium) Explore Q9ZHD2  Go to UniProtKB:  Q9ZHD2

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Probable outer membrane lipoprotein SilC	C	463	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0  Gene Names: silC
UniProt
Find proteins for Q9ZHD2 (Salmonella typhimurium) Explore Q9ZHD2  Go to UniProtKB:  Q9ZHD2

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free:  0.284 (Depositor), 0.284 (DCC) 
• R-Value Work:  0.237 (Depositor), 0.237 (DCC) 
• R-Value Observed: 0.239 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 88.055	α = 90
b = 326.789	β = 120.27
c = 88.101	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-07-23 
Deposition Author(s): Lithgo, R.M., Carr, S.B., Quigley, A.M., Scott, D.J.

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Funding Organization	Location	Grant Number
Wellcome Trust	United Kingdom	202892/Z/16/Z
Wellcome Trust	United Kingdom	223727/Z/21/Z
Biotechnology and Biological Sciences Research Council (BBSRC)	United Kingdom	BB/M008770/1

Revision History  

• Version 1.0: 2025-07-23
  Type: Initial release