9MN2 | pdb_00009mn2

Crystal Structure of the B6C Region of the Group B Streptococcus Beta Antigen C Protein

PDB DOI: https://doi.org/10.2210/pdb9MN2/pdb

Classification: PROTEIN BINDING
Organism(s): Streptococcus agalactiae
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2024-12-20 Released: 2025-08-27
Deposition Author(s): Zhang, Y., Geisbrecht, B.V.
Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.05 Å
R-Value Free:
0.274 (Depositor), 0.275 (DCC)
R-Value Work:
0.243 (Depositor), 0.244 (DCC)
R-Value Observed:
0.246 (Depositor)

wwPDB Validation 3D Report Full Report

This is version 1.0 of the entry. See complete history.

Literature

Bacterial Immune Evasion of Antibody Responses by Hijacking Inhibitory Immune Receptors

Zhang, Y., Geisbrecht, B.V.

To be published.

Macromolecule Content

Total Structure Weight: 39.88 kDa
Atom Count: 2,558
Modeled Residue Count: 307
Deposited Residue Count: 344
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
IgA FC receptor	A, B	172	Streptococcus agalactiae	Mutation(s): 0 Gene Names: bag
UniProt
Find proteins for P27951 (Streptococcus agalactiae) Explore P27951 Go to UniProtKB: P27951
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P27951
Sequence Annotations Expand
Reference Sequence

Small Molecules

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

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.05 Å
R-Value Free: 0.274 (Depositor), 0.275 (DCC)
R-Value Work: 0.243 (Depositor), 0.244 (DCC)
R-Value Observed: 0.246 (Depositor)

Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 61.734	α = 90
b = 79.033	β = 90
c = 81.185	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data scaling
HKL-2000	data reduction
AutoSol	phasing

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Released Date: 2025-08-27

Deposition Author(s):

Geisbrecht, B.V.

Funding Organization	Location	Grant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	R21AI155828

Revision History (Full details and data files)

Version 1.0: 2025-08-27
Type: Initial release

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.