7AL7: Human IL-18

The Crystal Structure of Human IL-18 in Complex With Human IL-18 Binding Protein. Determined by X-ray diffraction at 1.8 Å resolution. Released 20 Apr 2022.

Method
X-ray diffraction
Resolution
1.8 Å
Organisms
Homo sapiens, Schistosoma japonicum
Chains
2
Atoms
2,291
Mol. weight
65.11 kDa
Ligands
NAG
Released
20 Apr 2022

Explore 7AL7 in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

7AL7 contains 10 α-helices and 22 β-strands across 2 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: 4 helices, 9 β-strands

ElementResiduesLengthSheet
β-strand66-7051
α-helix75-773
β-strand82-9091
β-strand97-10262
β-strand105-10622
α-helix107-1093
β-strand114-11631
β-strand120-12341
β-strand128-13691
α-helix141-1444
β-strand147-15372
β-strand158-16472
α-helix165-1695
Chain B: 6 helices, 13 β-strands
ElementResiduesLengthSheet
β-strand38-49123
α-helix541
β-strand55-5843
β-strand64-6743
α-helix74-763
α-helix79-813
β-strand83-9083
β-strand96-10383
β-strand107-11153
α-helix113-1153
β-strand118-12143
α-helix123-1253
β-strand127-12823
β-strand137-14153
β-strand149-15353
β-strand159-16683
β-strand169-17683
α-helix183-1853
β-strand187-19153

Molecules and chains

MoleculeChainsTypeLengthOrganismUniProt
Interleukin-18-binding proteinAprotein172Homo sapiensO95998 (AlphaFold model)
Glutathione S-transferase class-mu 26 kDa isozyme,Interleukin-18Bprotein390Schistosoma japonicum, Homo sapiensP08515 (AlphaFold model), Q14116 (AlphaFold model)
Sequence of entity 1 (A), FASTA
>7AL7_1 Interleukin-18-binding protein (chains A)
TGQCPALEVTWPEVEVPLNGTLSLSCVACSRFPNFSILYWLGNGSFIEHLPGRLWEGSTS
RERGSTGTQLCKALVLEQLTPALHSTNFSCVLVDPEQVVQRHVVLAQLWAGLRATLPPTQ
EALPSSHSSPQQQGGTSDEVDGGSGGSGLNDIFEAQKIEWHEGRTKHHHHHH
Sequence of entity 2 (B), FASTA
>7AL7_2 Glutathione S-transferase class-mu 26 kDa isozyme,Interleukin-18 (chains B)
MHHHHHHSPILGYWKIKGLVQPTRLLLEYLEEKYEEHLYERDEGDKWRNKKFELGLEFPN
LPYYIDGDVKLTQSMAIIRYIADKHNMLGGCPKERAEISMLEGAVLDIRYGVSRIAYSKD
FETLKVDFLSKLPEMLKMFEDRLCHKTYLNGDHVTHPDFMLYDALDVVLYMDPMCLDAFP
KLVCFKKRIEAIPQIDKYLKSSKYIAWPLQGWQATFGGGDHPPKSDREFDEVDYFGKLES
KLSVIRNLNDQVLFIDQGNRPLFEDMTDSDCRDNAPRTIFIISMYKDSQPRGMAVTISVK
CEKISTLSCENKIISFKEMNPPDNIKDTKSDIIFFQRSVPGHDNKMQFESSSYEGYFLAC
EKERDLFKLILKKEDELGDRSIMFTVQNED

Ligands and cofactors

IDNameFormulaCopies
NAG2-acetamido-2-deoxy-beta-D-glucopyranoseC8 H15 N O63

Primary citation

Structural basis of human IL-18 sequestration by the decoy receptor IL-18 binding protein in inflammation and tumor immunity. Detry, S., Andries, J., Bloch, Y. et al. J Biol Chem (2022) 298:101908-101908. DOI 10.1016/j.jbc.2022.101908 · PubMed

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