9HML: KIR2DL1

KIR2DL1 bound to RIFIN PfKE01_040007400. Determined by X-ray diffraction at 2.17 Å resolution. Released 9 Apr 2025.

Method
X-ray diffraction
Resolution
2.17 Å
Organisms
Plasmodium falciparum, Homo sapiens, Escherichia coli
Chains
3
Atoms
3,380
Mol. weight
51.61 kDa
Ligands
NAG
Released
9 Apr 2025

Explore 9HML in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

9HML contains 12 α-helices and 33 β-strands across 3 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.

Chain A: 7 helices, 1 β-strand

ElementResiduesLengthSheet
α-helix11-2717
α-helix31-355
α-helix49-6012
α-helix62-654
α-helix77-804
α-helix81-855
β-strand98-10031
α-helix101-12121
Chain B: 3 helices, 20 β-strands
ElementResiduesLengthSheet
β-strand30-3452
β-strand38-4033
β-strand45-5172
β-strand57-6481
β-strand68-7361
β-strand75-7732
β-strand80-8782
α-helix92-943
β-strand96-105101
β-strand110-11121
α-helix113-1175
β-strand118-12031
β-strand121-12333
β-strand130-13234
β-strand146-15164
β-strand157-16265
β-strand169-17245
β-strand174-17524
β-strand181-18664
β-strand195-20285
β-strand205-20955
α-helix211-2155
β-strand216-21725
Chain C: 2 helices, 12 β-strands
ElementResiduesLengthSheet
β-strand4-746
β-strand10-1237
β-strand18-2476
α-helix29-313
β-strand33-3977
β-strand46-5167
β-strand57-5937
β-strand67-7266
β-strand77-8266
α-helix87-893
β-strand91-9887
β-strand10113
β-strand106-10947
β-strand113-11757

Molecules and chains

MoleculeChainsTypeLengthOrganismUniProt
Rifin PfKE01_040007400Aprotein140Plasmodium falciparumA0A024WGN3 (AlphaFold model)
KIR2DL proteinBprotein204Homo sapiensP43626 (AlphaFold model)
nanobody Nb1Cprotein126Escherichia coli
Sequence of entity 1 (A), FASTA
>9HML_1 RIFIN PfKE01_040007400 (chains A)
GSAKGAAACEAARIPAAIDAVIKGIVTKFGVSTESVQGLKSLFTANTYNDVTKIARAINE
QYNPSSCLTGGSGADNSICPWAMENFFAARKIPGFIQREAVSMNDVIEKTVKTIVSDAPK
TAETACKKATEGTGGSEPEA
Sequence of entity 2 (B), FASTA
>9HML_2 KIR2DL protein (chains B)
TGRKPSLLAHPGPLVKSEETVILQCWSDVMFEHFLLHREGMFNDTLRLIGEHHDGVSKAN
FSISRMTQDLAGTYRCYGSVTHSPYQVSAPSDPLDIVIIGLYEKPSLSAQPGPTVLAGEN
VTLSCSSRSSYDMYHLSREGEAHERRLPAGPKVNGTFQADFPLGPATHGGTYRCFGSFHD
SPYEWSKSSDPLLVSGTKHHHHHH
Sequence of entity 3 (C), FASTA
>9HML_3 nanobody Nb1 (chains C)
QRQLVESGGGLVQPGGSLRLSCAASGRSFSDYTMGWFRQAPGKEREFVAAISWSGGSTYA
DSVKGRFIISRDNVKNTVYLQMNSLEPEDTAVYYCAAERTGWSSEYDYWGKGTPVTVSSG
HHHHHH

Ligands and cofactors

IDNameFormulaCopies
NAG2-acetamido-2-deoxy-beta-D-glucopyranoseC8 H15 N O61

Primary citation

RIFINs displayed on malaria-infected erythrocytes bind KIR2DL1 and KIR2DS1. Sakoguchi, A., Chamberlain, S.G., Morch, A.M. et al. Nature (2025) 643:1363-1371. DOI 10.1038/s41586-025-09091-y · PubMed

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