7K1U | pdb_00007k1u

Crystal Structure of SrtB-anchored Collagen-binding Adhesin Fragment (residues 206-565) from Clostridioides difficile strain 630

• PDB DOI: https://doi.org/10.2210/pdb7K1U/pdb

• Classification: CELL ADHESION
• Organism(s): Clostridioides difficile 630
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2020-09-08 Released: 2021-10-20 
• Deposition Author(s): Minasov, G., Shuvalova, L., Rosas-Lemus, M., Wiersum, G., Satchell, K.J.F., Center for Structural Genomics of Infectious Diseases (CSGID)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 
  0.217 (Depositor), 0.230 (DCC) 
• R-Value Work: 
  0.174 (Depositor), 0.180 (DCC) 
• R-Value Observed: 
  0.176 (Depositor) 

Literature

A high-throughput structural system biology approach to increase structure representation of proteins from Clostridioides difficile.

Rosas-Lemus, M., Dey, S., Minasov, G., Tan, K., Anderson, S.M., Brunzelle, J., Nocadello, S., Shabalin, I., Filippova, E., Halavaty, A., Kim, Y., Maltseva, N., Osipiuk, J., Minor, W., Joachimiak, A., Savchenko, A., Anderson, W.F., Satchell, K.J.F.

(2023) Microbiol Resour Announc 12: e0050723-e0050723

• PubMed: 37747257 
• DOI: https://doi.org/10.1128/MRA.00507-23
• Primary Citation of Related Structures:  
  7K1U, 7RL8, 7RLR


• PubMed Abstract: 
  

  Clostridioides difficile causes life-threatening gastrointestinal infections. It is a high-risk pathogen due to a lack of effective treatments, antimicrobial resistance, and a poorly conserved genomic core. Herein, we report 30 X-ray structures from a structure genomics pipeline spanning 13 years, representing 10.2% of the X-ray structures for this important pathogen.

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Organizational Affiliation: 
• Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA.
Center for Structural Biology of Infectious Diseases, Chicago, Illinois, USA.
Consortium for Advanced Science and Engineering, University of Chicago, Chicago, Illinois, USA.
Structural Biology Center, X-ray Science Division, Argonne National Laboratory, Argonne, Illinois, USA.
Northwestern Synchrotron Research Center, Life Sciences Collaborative Access Team, Northwestern University, Argonne, Illinois, USA.
Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada.
Department of Biochemistry and Molecular Genetics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 39.66 kDa 
• Atom Count: 2,115 
• Modeled Residue Count: 253 
• Deposited Residue Count: 365 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Collagen-binding Adhesin	A	365	Clostridioides difficile 630	Mutation(s): 0  Gene Names: CD630_03860
UniProt
Find proteins for Q18DC3 (Clostridioides difficile (strain 630)) Explore Q18DC3  Go to UniProtKB:  Q18DC3

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BTB	B [auth A]	2-[BIS-(2-HYDROXY-ETHYL)-AMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL C8 H19 N O5 OWMVSZAMULFTJU-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free:  0.217 (Depositor), 0.230 (DCC) 
• R-Value Work:  0.174 (Depositor), 0.180 (DCC) 
• R-Value Observed: 0.176 (Depositor) 

Diffraction Data: https://doi.org/10.18430/m37k1u

Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 69.323	α = 90
b = 69.323	β = 90
c = 187.527	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-3000	data reduction
HKL-3000	data scaling
HKL-3000	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2021-10-20 
Deposition Author(s): Minasov, G., Shuvalova, L., Rosas-Lemus, M., Wiersum, G., Satchell, K.J.F., Center for Structural Genomics of Infectious Diseases (CSGID)

Revision History  

• Version 1.0: 2021-10-20
  Type: Initial release
  
• Version 1.1: 2021-11-10
  Changes: Database references
• Version 1.2: 2024-10-09
  Changes: Data collection, Structure summary
• Version 1.3: 2026-02-11
  Changes: Database references