7CBS

Crystal structure of SpaB basal pilin from Lactobacillus rhamnosus GG

• PDB DOI: https://doi.org/10.2210/pdb7CBS/pdb

• Classification: CELL ADHESION
• Organism(s): Lacticaseibacillus rhamnosus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2020-06-13 Released: 2020-12-30 
• Deposition Author(s): Megta, A.K., Pratap, S., Kant, A., Krishnan, V.
• Funding Organization(s): Department of Biotechnology (DBT, India)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.39 Å
• R-Value Free: 0.228 
• R-Value Work: 0.190 
• R-Value Observed: 0.192 

Literature

Crystal structure of the atypically adhesive SpaB basal pilus subunit: Mechanistic insights about its incorporation in lactobacillar SpaCBA pili.

Megta, A.K., Pratap, S., Kant, A., Palva, A., von Ossowski, I., Krishnan, V.

(2020) Curr Res Struct Biol 2: 229-238

• DOI: https://doi.org/10.1016/j.crstbi.2020.11.001

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)

Biological Assembly 3  

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

Biological assembly 3 assigned by authors and generated by PISA (software)

Biological Assembly 4  

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

Biological assembly 4 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 151.24 kDa 
• Atom Count: 7,270 
• Modelled Residue Count: 991 
• Deposited Residue Count: 1,400 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
LPXTG cell wall anchor domain-containing protein	A, B, C, D, E, F [auth G], G [auth F], H [auth L]	175	Lacticaseibacillus rhamnosus	Mutation(s): 0  Gene Names: F8M46_02260

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CL	J [auth B], L [auth C], M [auth D]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
MG (Subject of Investigation/LOI)	I [auth A], K [auth C], N [auth F], O [auth L]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.39 Å
• R-Value Free: 0.228 
• R-Value Work: 0.190 
• R-Value Observed: 0.192 
• Space Group: P 3₂

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.526	α = 90
b = 51.526	β = 90
c = 408.208	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2020-12-30 
Deposition Author(s): Megta, A.K., Pratap, S., Kant, A., Krishnan, V.

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Funding Organization	Location	Grant Number
Department of Biotechnology (DBT, India)	India	BT/PR5891/BRB/10/1098/2012

Revision History  

• Version 1.0: 2020-12-30
  Type: Initial release
  
• Version 1.1: 2024-03-27
  Changes: Data collection, Database references, Refinement description