SMTL ID : 1xk4.2 (2 other biounits)

Crystal structure of human calprotectin(S100A8/S100A9)

Coordinates

PDB Format Compare

Method

X-RAY DIFFRACTION 1.80 Å

Oligo State

hetero-2-2-mer

Ligands

8 x CA: CALCIUM ION(Non-covalent)

CA.1: 5 residues within 4Å: Chain A: D.59, N.61, D.63, A.65, E.70 5 PLIP interactions: 4 interactions with chain A, 1 Ligand-Water interactions Metal complexes: A:D.59, A:D.63, A:A.65, A:E.70, H2O.4 CA.2: 5 residues within 4Å: Chain A: S.20, K.23, N.25, A.28, Y.30 5 PLIP interactions: 4 interactions with chain A, 1 Ligand-Water interactions Metal complexes: A:S.20, A:K.23, A:N.25, A:A.28, H2O.4 CA.3: 5 residues within 4Å: Chain B: D.59, N.61, D.63, A.65, E.70 5 PLIP interactions: 4 interactions with chain B, 1 Ligand-Water interactions Metal complexes: B:D.59, B:D.63, B:A.65, B:E.70, H2O.7 CA.4: 5 residues within 4Å: Chain B: S.20, K.23, N.25, A.28, Y.30 5 PLIP interactions: 4 interactions with chain B, 1 Ligand-Water interactions Metal complexes: B:S.20, B:K.23, B:N.25, B:A.28, H2O.7 CA.7: 5 residues within 4Å: Chain C: D.66, N.68, D.70, Q.72, E.77 5 PLIP interactions: 4 interactions with chain C, 1 Ligand-Water interactions Metal complexes: C:D.66, C:D.70, C:Q.72, C:E.77, H2O.10 CA.8: 6 residues within 4Å: Chain C: S.22, L.25, G.26, H.27, T.30, E.35 6 PLIP interactions: 5 interactions with chain C, 1 Ligand-Water interactions Metal complexes: C:S.22, C:L.25, C:H.27, C:T.30, C:E.35, H2O.9 CA.9: 5 residues within 4Å: Chain D: D.66, N.68, D.70, Q.72, E.77 5 PLIP interactions: 4 interactions with chain D, 1 Ligand-Water interactions Metal complexes: D:D.66, D:D.70, D:Q.72, D:E.77, H2O.12 CA.10: 5 residues within 4Å: Chain D: S.22, L.25, H.27, T.30, E.35 6 PLIP interactions: 5 interactions with chain D, 1 Ligand-Water interactions Metal complexes: D:S.22, D:L.25, D:H.27, D:T.30, D:E.35, H2O.13

1 x CL: CHLORIDE ION(Non-functional Binders)

CL.5: 0 residues within 4Å: (No contacts) Ligand excluded by PLIP

1 x FLC: CITRATE ANION(Non-covalent)

FLC.6: 5 residues within 4Å: Chain B: T.3, E.4 Chain D: Y.21, K.42, D.43 6 PLIP interactions: 3 interactions with chain B, 3 interactions with chain D Hydrogen bonds: B:E.4, D:Y.21, D:Q.45 Water bridges: B:L.5, B:L.5 Salt bridges: D:K.42

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Korndoerfer, I.P. et al., The crystal structure of the human (S100A8/S100A9)2 heterotetramer, calprotectin, illustrates how conformational changes of interacting alpha-helices can determine specific association of two EF-hand proteins. J.Mol.Biol. (2007)

Release Date

2005-10-18

Peptides

Calgranulin A: AB
Calgranulin B: CD

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
E

B
F

C
G

D
H

Calgranulin A

Calgranulin B

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