SMTL ID : 8sku.1

Structure of human SIgA1 in complex with human CD89 (FcaR1)

Coordinates

PDB Format

Method

ELECTRON MICROSCOPY

Oligo State

hetero-4-1-2-1-mer

Ligands

4 x NAG- NAG: 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose(Post Translational Modification)

NAG-NAG.1: 3 residues within 4Å: Chain C: F.69, E.71, N.72 No protein-ligand interaction detected (PLIP) NAG-NAG.2: 6 residues within 4Å: Chain E: D.136, E.142, N.144, V.171, V.188, P.190 1 PLIP interactions: 1 interactions with chain E Hydrophobic interactions: E:P.190 NAG-NAG.3: 3 residues within 4Å: Chain H: N.49, S.51, T.100 No protein-ligand interaction detected (PLIP) NAG-NAG.4: 6 residues within 4Å: Chain C: E.392, Q.412, N.451, W.523, Y.541, A.543 2 PLIP interactions: 2 interactions with chain C Hydrogen bonds: C:E.392, C:Q.412

4 x NAG: 2-acetamido-2-deoxy-beta-D-glucopyranose(Post Translational Modification)

NAG.5: 4 residues within 4Å: Chain A: E.142, A.143, N.144, P.190 3 PLIP interactions: 3 interactions with chain A Hydrophobic interactions: A:E.142, A:P.190 Hydrogen bonds: A:E.142 NAG.6: 5 residues within 4Å: Chain B: D.136, E.142, A.143, N.144, P.190 3 PLIP interactions: 3 interactions with chain B Hydrophobic interactions: B:N.144 Hydrogen bonds: B:D.136, B:N.144 NAG.7: 5 residues within 4Å: Chain C: S.17, N.65, T.67, N.78, A.80 2 PLIP interactions: 2 interactions with chain C Hydrogen bonds: C:N.65, C:N.65 NAG.8: 1 residues within 4Å: Chain C: N.403 No protein-ligand interaction detected (PLIP)

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Liu, Q. et al., SIgA structures bound to Streptococcus pyogenes M4 and human CD89 provide insights into host-pathogen interactions. Nat Commun (2023)

Release Date

2023-10-25

Peptides

Immunoglobulin heavy constant alpha 1: ABEG
Secretory component: C
Immunoglobulin alpha Fc receptor: DF
Immunoglobulin J chain: H

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
A

B
B

E
C

G
D

C
E

D
R

F
S

H
J

Immunoglobulin heavy constant alpha 1

Secretory component

Immunoglobulin alpha Fc receptor

Immunoglobulin J chain

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