SMTL ID : 8skv.1

Structure of human SIgA1 in complex with Streptococcus pyogenes protein M4 (Arp4)

Coordinates

PDB Format

Method

ELECTRON MICROSCOPY

Oligo State

hetero-4-1-1-2-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 E: F.69, E.71, N.72 No protein-ligand interaction detected (PLIP) NAG-NAG.2: 4 residues within 4Å: Chain E: E.392, N.451, W.523, Y.541 No protein-ligand interaction detected (PLIP) NAG-NAG.3: 5 residues within 4Å: Chain C: D.136, E.142, N.144, V.171, P.190 No protein-ligand interaction detected (PLIP) NAG-NAG.4: 2 residues within 4Å: Chain F: N.49, S.51 No protein-ligand interaction detected (PLIP)

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

NAG.5: 6 residues within 4Å: Chain A: E.142, A.143, N.144, V.188, P.190, G.191 2 PLIP interactions: 2 interactions with chain A Hydrophobic interactions: A:E.142, A:P.190 NAG.6: 5 residues within 4Å: Chain B: D.136, E.142, N.144, V.171, P.190 No protein-ligand interaction detected (PLIP) NAG.7: 2 residues within 4Å: Chain A: N.340 Chain B: N.340 1 PLIP interactions: 1 interactions with chain B Hydrogen bonds: B:N.340 NAG.8: 4 residues within 4Å: Chain E: R.63, N.65, T.67, N.78 2 PLIP interactions: 2 interactions with chain E Hydrogen bonds: E:R.63, E:N.65 NAG.9: 4 residues within 4Å: Chain E: N.481, N.482, T.483, Q.486 No protein-ligand interaction detected (PLIP) NAG.10: 6 residues within 4Å: Chain E: I.151, V.156, V.158, N.166, N.168, Y.169 2 PLIP interactions: 2 interactions with chain E Hydrophobic interactions: E:V.156 Hydrogen bonds: E:N.168 NAG.11: 2 residues within 4Å: Chain E: R.357, N.403 1 PLIP interactions: 1 interactions with chain E Hydrogen bonds: E:R.357

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: ABCD
Secretory component: E
Immunoglobulin J chain: F
IgA receptor: GH

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
A

B
B

C
C

D
D

E
E

F
J

G
a

H
b

Immunoglobulin heavy constant alpha 1

Secretory component

Immunoglobulin J chain

IgA receptor

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