44IX | pdb_000044ix

KIR2DS4 bound to HLA-C*05:01 presenting the TM9SF4 peptide

PDB DOI: https://doi.org/10.2210/pdb44IX/pdb

Classification: IMMUNE SYSTEM
Organism(s): Homo sapiens
Expression System: Escherichia coli BL21
Mutation(s): Yes

Deposited: 2026-07-31 Released: 2026-11-11
Deposition Author(s): Faoro, C., Rossjohn, J.
Funding Organization(s): National Health and Medical Research Council (NHMRC, Australia)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.85 Å
R-Value Free:
0.262 (Depositor), 0.264 (DCC)
R-Value Work:
0.214 (Depositor), 0.216 (DCC)
R-Value Observed:
0.217 (Depositor)

Starting Models: experimental
View more details

wwPDB Validation 3D Report Full Report

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

Literature

KIR2DS4 bound to HLA-C*05:01 presenting the TM9SF4 peptide

Faoro, C., Rossjohn, J.

To be published.

Macromolecule Content

Total Structure Weight: 135.9 kDa
Atom Count: 9,378
Modeled Residue Count: 1,164
Deposited Residue Count: 1,172
Unique protein chains: 4

Macromolecules

Find similar proteins by:

| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HLA class I histocompatibility antigen, C alpha chain	A, E	279	Homo sapiens	Mutation(s): 22 Gene Names: HLA-C, HLAC
UniProt & NIH Common Fund Data Resources
Find proteins for P10321 (Homo sapiens) Explore P10321 Go to UniProtKB: P10321
PHAROS: P10321 GTEx: ENSG00000204525
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P10321
Sequence Annotations Expand
Reference Sequence

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| 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-2-microglobulin	B, F	100	Homo sapiens	Mutation(s): 0 Gene Names: B2M
UniProt & NIH Common Fund Data Resources
Find proteins for P61769 (Homo sapiens) Explore P61769 Go to UniProtKB: P61769
GTEx: ENSG00000166710
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P61769
Sequence Annotations Expand
Reference Sequence

Find similar proteins by: Sequence | 3D Structure

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
TM9SF4 peptide	C, G	9	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for Q92544 (Homo sapiens) Explore Q92544 Go to UniProtKB: Q92544
PHAROS: Q92544 GTEx: ENSG00000101337
Entity Groups
UniProt Group	Q92544
Sequence Annotations Expand
Reference Sequence

Find similar proteins by:

| 3D Structure

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Killer cell immunoglobulin-like receptor 2DS4	D, H	198	Homo sapiens	Mutation(s): 0 Gene Names: KIR2DS4, CD158I, KKA3, NKAT8
UniProt
Find proteins for P43632 (Homo sapiens) Explore P43632 Go to UniProtKB: P43632
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P43632
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
SO4 Query on SO4 Download:Ideal Coordinates CCD File SDF format, chain I [auth A] SDF format, chain M [auth D] SDF format, chain N [auth D] SDF format, chain O [auth D] SDF format, chain P [auth D] SDF format, chain Q [auth D] SDF format, chain R [auth E] SDF format, chain S [auth E] SDF format, chain T [auth F] SDF format, chain W [auth H] MOL2 format, chain I [auth A] MOL2 format, chain M [auth D] MOL2 format, chain N [auth D] MOL2 format, chain O [auth D] MOL2 format, chain P [auth D] MOL2 format, chain Q [auth D] MOL2 format, chain R [auth E] MOL2 format, chain S [auth E] MOL2 format, chain T [auth F] MOL2 format, chain W [auth H] mmCIF format, chain I [auth A] mmCIF format, chain M [auth D] mmCIF format, chain N [auth D] mmCIF format, chain O [auth D] mmCIF format, chain P [auth D] mmCIF format, chain Q [auth D] mmCIF format, chain R [auth E] mmCIF format, chain S [auth E] mmCIF format, chain T [auth F] mmCIF format, chain W [auth H]	I [auth A] M [auth D] N [auth D] O [auth D] P [auth D] I [auth A], M [auth D], N [auth D], O [auth D], P [auth D], Q [auth D], R [auth E], S [auth E], T [auth F], W [auth H]	SULFATE ION O₄ S QAOWNCQODCNURD-UHFFFAOYSA-L		Interactions Focus chain I [auth A] Focus chain M [auth D] Focus chain N [auth D] Focus chain O [auth D] Focus chain P [auth D] Focus chain Q [auth D] Focus chain R [auth E] Focus chain S [auth E] Focus chain T [auth F] Focus chain W [auth H] Interactions & Density Focus chain I [auth A] Focus chain M [auth D] Focus chain N [auth D] Focus chain O [auth D] Focus chain P [auth D] Focus chain Q [auth D] Focus chain R [auth E] Focus chain S [auth E] Focus chain T [auth F] Focus chain W [auth H]
GOL Query on GOL Download:Ideal Coordinates CCD File SDF format, chain J [auth B] SDF format, chain L [auth D] SDF format, chain U [auth H] SDF format, chain V [auth H] SDF format, chain K [auth D] MOL2 format, chain J [auth B] MOL2 format, chain L [auth D] MOL2 format, chain U [auth H] MOL2 format, chain V [auth H] MOL2 format, chain K [auth D] mmCIF format, chain J [auth B] mmCIF format, chain L [auth D] mmCIF format, chain U [auth H] mmCIF format, chain V [auth H] mmCIF format, chain K [auth D]	J [auth B], K [auth D], L [auth D], U [auth H], V [auth H]	GLYCEROL C₃ H₈ O₃ PEDCQBHIVMGVHV-UHFFFAOYSA-N		Interactions Focus chain J [auth B] Focus chain K [auth D] Focus chain L [auth D] Focus chain U [auth H] Focus chain V [auth H] Interactions & Density Focus chain J [auth B] Focus chain K [auth D] Focus chain L [auth D] Focus chain U [auth H] Focus chain V [auth H]