9CXL | pdb_00009cxl

Crystal structure of IgG1 FC WT at pH 5.5

PDB DOI: https://doi.org/10.2210/pdb9CXL/pdb

Classification: IMMUNE SYSTEM
Organism(s): Homo sapiens
Expression System: Homo sapiens
Mutation(s): No

Deposited: 2024-07-31 Released: 2026-03-18
Deposition Author(s): Reddem, E.R., Shapiro, L.
Funding Organization(s): Bill & Melinda Gates Foundation

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.33 Å
R-Value Free:
0.279 (Depositor), 0.281 (DCC)
R-Value Work:
0.225 (Depositor), 0.232 (DCC)
R-Value Observed:
0.231 (Depositor)

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

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

Literature

Crystal structure of IgG1 FC WT at pH 5.6

Reddem, E.R., Shapiro, L.

To be published.

Macromolecule Content

Total Structure Weight: 53.15 kDa
Atom Count: 2,601
Modeled Residue Count: 312
Deposited Residue Count: 462
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Immunoglobulin gamma-1 heavy chain Fc Fragment	A, B	231	Homo sapiens	Mutation(s): 0
UniProt
Find proteins for P0DOX5 (Homo sapiens) Explore P0DOX5 Go to UniProtKB: P0DOX5
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P0DOX5
Glycosylation
Glycosylation Sites: 1	Glycosylation Focus chain A
Sequence Annotations Expand
Reference Sequence

Oligosaccharides

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose	C	7		N-Glycosylation	Interactions Focus chain C Interactions & Density Focus chain C
Glycosylation Resources
GlyTouCan: G32156ZV GlyCosmos: G32156ZV GlyGen: G32156ZV

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.33 Å
R-Value Free: 0.279 (Depositor), 0.281 (DCC)
R-Value Work: 0.225 (Depositor), 0.232 (DCC)
R-Value Observed: 0.231 (Depositor)

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 67.385	α = 90
b = 111.454	β = 95.74
c = 63.66	γ = 90

Software Package:

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

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Released Date: 2026-03-18

Deposition Author(s):

Funding Organization	Location	Grant Number
Bill & Melinda Gates Foundation	United States	INV-016167

Revision History (Full details and data files)

Version 1.0: 2026-03-18
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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.