9IBF | pdb_00009ibf

Crystal structure of hFcgammaRI-FAb complex

PDB DOI: https://doi.org/10.2210/pdb9IBF/pdb

Classification: IMMUNE SYSTEM
Organism(s): Homo sapiens, Mus musculus
Expression System: Cricetulus griseus
Mutation(s): Yes

Deposited: 2025-02-12 Released: 2026-08-26
Deposition Author(s): Feitsma, L.J., Janssen, B.J.C.
Funding Organization(s): Not funded

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 3.20 Å
R-Value Free:
0.314 (Depositor), 0.326 (DCC)
R-Value Work:
0.259 (Depositor), 0.269 (DCC)

Starting Models: experimental
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wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

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

Literature

Crystal structure of hFcgammaRI-FAb complex

Holtrop, T., Feitsma, L.J., Janssen, B.J.C., Leusen, J.H.W.

To be published.

Macromolecule Content

Total Structure Weight: 160.99 kDa
Atom Count: 11,029
Modeled Residue Count: 1,415
Deposited Residue Count: 1,446
Unique protein chains: 3

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
High affinity immunoglobulin gamma Fc receptor I	A, B	280	Homo sapiens	Mutation(s): 19 Gene Names: FCGR1A, FCG1, FCGR1, IGFR1
UniProt & NIH Common Fund Data Resources
Find proteins for P12314 (Homo sapiens) Explore P12314 Go to UniProtKB: P12314
GTEx: ENSG00000150337
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P12314
Glycosylation
Glycosylation Sites: 3	Glycosylation Focus chain A Focus chain B	Go to GlyGen: P12314-1
Sequence Annotations Expand
Reference Sequence

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| 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Antibody Heavy chain FAb	C [auth H], E [auth I]	223	Mus musculus	Mutation(s): 0
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
Sequence Annotations Expand
Reference Sequence

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| 3D Structure

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Antibody Light chain FAb	D [auth L], F [auth M]	220	Mus musculus	Mutation(s): 0
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
Sequence Annotations Expand
Reference Sequence

Oligosaccharides

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Entity ID: 4
Molecule	Chains	Length	2D Diagram	Glycosylation	D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	G [auth C], H [auth D], I [auth E]	2		N-Glycosylation	Interactions Focus chain G [auth C] Focus chain H [auth D] Focus chain I [auth E] Interactions & Density Focus chain G [auth C] Focus chain H [auth D] Focus chain I [auth E]

Entity ID: 5
Molecule	Chains	Length	2D Diagram	Glycosylation	D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	J [auth F]	3		N-Glycosylation	Interactions Focus chain J [auth F] Interactions & Density Focus chain J [auth F]

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
EPE Query on EPE Download:Ideal Coordinates CCD File SDF format, chain Q [auth L] MOL2 format, chain Q [auth L] mmCIF format, chain Q [auth L]	Q [auth L]	4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID C₈ H₁₈ N₂ O₄ S JKMHFZQWWAIEOD-UHFFFAOYSA-N		Interactions Focus chain Q [auth L] Interactions & Density Focus chain Q [auth L]
NAG Query on NAG Download:Ideal Coordinates CCD File SDF format, chain K [auth A] SDF format, chain N [auth B] MOL2 format, chain K [auth A] MOL2 format, chain N [auth B] mmCIF format, chain K [auth A] mmCIF format, chain N [auth B]	K [auth A], N [auth B]	2-acetamido-2-deoxy-beta-D-glucopyranose C₈ H₁₅ N O₆ OVRNDRQMDRJTHS-FMDGEEDCSA-N		Interactions Focus chain K [auth A] Focus chain N [auth B] Interactions & Density Focus chain K [auth A] Focus chain N [auth B]
CL Query on CL Download:Ideal Coordinates CCD File SDF format, chain L [auth A] SDF format, chain M [auth A] SDF format, chain O [auth B] SDF format, chain P [auth H] SDF format, chain R [auth I] MOL2 format, chain L [auth A] MOL2 format, chain M [auth A] MOL2 format, chain O [auth B] MOL2 format, chain P [auth H] MOL2 format, chain R [auth I] mmCIF format, chain L [auth A] mmCIF format, chain M [auth A] mmCIF format, chain O [auth B] mmCIF format, chain P [auth H] mmCIF format, chain R [auth I]	L [auth A], M [auth A], O [auth B], P [auth H], R [auth I]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M		Interactions Focus chain L [auth A] Focus chain M [auth A] Focus chain O [auth B] Focus chain P [auth H] Focus chain R [auth I] Interactions & Density Focus chain L [auth A] Focus chain M [auth A] Focus chain O [auth B] Focus chain P [auth H] Focus chain R [auth I]