Function and Biology

HLA-DR1 complexed with a 16 residue HIV capsid peptide bound in a hairpin conformation

GO terms

Biochemical function:
Biological process:
Cellular component:

Sequence families

Pfam Protein families (Pfam)
PF02876
Domain description: Staphylococcal/Streptococcal toxin, beta-grasp domain
Occurring in:
  1. Enterotoxin type C-3
1 copy of Pfam domain PF02876 (Staphylococcal/Streptococcal toxin, beta-grasp domain) in Enterotoxin type C-3 in PDB 1sje.

PF00969
Domain description: Class II histocompatibility antigen, beta domain
Occurring in:
  1. HLA class II histocompatibility antigen, DRB1-1 beta chain
1 copy of Pfam domain PF00969 (Class II histocompatibility antigen, beta domain) in HLA class II histocompatibility antigen, DRB1-1 beta chain in PDB 1sje.

PF00993
Domain description: Class II histocompatibility antigen, alpha domain
Occurring in:
  1. HLA class II histocompatibility antigen, DR alpha chain
1 copy of Pfam domain PF00993 (Class II histocompatibility antigen, alpha domain) in HLA class II histocompatibility antigen, DR alpha chain in PDB 1sje.

PF01123
Domain description: Staphylococcal/Streptococcal toxin, OB-fold domain
Occurring in:
  1. Enterotoxin type C-3
1 copy of Pfam domain PF01123 (Staphylococcal/Streptococcal toxin, OB-fold domain) in Enterotoxin type C-3 in PDB 1sje.

InterPro InterPro annotations
IPR013307
Domain description: Superantigen, staphylococcal/streptococcal toxin, bacterial
Occurring in:
  1. Enterotoxin type C-3
IPR000353
Domain description: MHC class II, beta chain, N-terminal
Occurring in:
  1. HLA class II histocompatibility antigen, DRB1-1 beta chain
IPR006177
Domain description: Staphylococcal/streptococcal toxin, bacterial
Occurring in:
  1. Enterotoxin type C-3
IPR006126
Domain description: Staphylococcal enterotoxin/Streptococcal pyrogenic exotoxin, conserved site
Occurring in:
  1. Enterotoxin type C-3
IPR003006
Domain description: Immunoglobulin/major histocompatibility complex, conserved site
Occurring in:
  1. HLA class II histocompatibility antigen, DR alpha chain
  2. HLA class II histocompatibility antigen, DRB1-1 beta chain
IPR001003
Domain description: MHC class II, alpha chain, N-terminal
Occurring in:
  1. HLA class II histocompatibility antigen, DR alpha chain
IPR014745
Domain description: MHC class II, alpha/beta chain, N-terminal
Occurring in:
  1. HLA class II histocompatibility antigen, DR alpha chain
  2. HLA class II histocompatibility antigen, DRB1-1 beta chain
IPR011162
Domain description: MHC classes I/II-like antigen recognition protein
Occurring in:
  1. HLA class II histocompatibility antigen, DR alpha chain
  2. HLA class II histocompatibility antigen, DRB1-1 beta chain
IPR036179
Domain description: Immunoglobulin-like domain superfamily
Occurring in:
  1. HLA class II histocompatibility antigen, DR alpha chain
  2. HLA class II histocompatibility antigen, DRB1-1 beta chain
IPR006173
Domain description: Staphylococcal/Streptococcal toxin, OB-fold
Occurring in:
  1. Enterotoxin type C-3
IPR006123
Domain description: Staphylococcal/Streptococcal toxin, beta-grasp domain
Occurring in:
  1. Enterotoxin type C-3
IPR008919
Domain description: Retrovirus capsid, N-terminal
Occurring in:
  1. Capsid protein p24
IPR008992
Domain description: Enterotoxin
Occurring in:
  1. Enterotoxin type C-3
IPR016091
Domain description: Superantigen toxin, C-terminal
Occurring in:
  1. Enterotoxin type C-3

Structure domains

CATH CATH domains
3.10.20.120
Class: Alpha Beta
Architecture: Roll
Topology: Ubiquitin-like (UB roll)
Homology: Ubiquitin-like (UB roll)
Occurring in:
  1. Enterotoxin type C-3
1 copy of CATH domain 3.10.20.120 (Ubiquitin-like (UB roll)) in Enterotoxin type C-3 in PDB 1sje.
3.10.320.10
Class: Alpha Beta
Architecture: Roll
Topology: Class II Histocompatibility Antigen, M Beta Chain; Chain B, domain 1
Homology: Class II Histocompatibility Antigen, M Beta Chain; Chain B, domain 1
Occurring in:
  1. HLA class II histocompatibility antigen, DR alpha chain
  2. HLA class II histocompatibility antigen, DRB1-1 beta chain
2 copies of CATH domain 3.10.320.10 (Class II Histocompatibility Antigen, M Beta Chain; Chain B, domain 1) in HLA class II histocompatibility antigen, DRB1-1 beta chain in PDB 1sje.
1 copy of CATH domain 3.10.320.10 (Class II Histocompatibility Antigen, M Beta Chain; Chain B, domain 1) in HLA class II histocompatibility antigen, DR alpha chain in PDB 1sje.
2.60.40.10
Class: Mainly Beta
Architecture: Sandwich
Topology: Immunoglobulin-like
Homology: Immunoglobulins
Occurring in:
  1. HLA class II histocompatibility antigen, DR alpha chain
  2. HLA class II histocompatibility antigen, DRB1-1 beta chain
2 copies of CATH domain 2.60.40.10 (Immunoglobulin-like) in HLA class II histocompatibility antigen, DRB1-1 beta chain in PDB 1sje.
1 copy of CATH domain 2.60.40.10 (Immunoglobulin-like) in HLA class II histocompatibility antigen, DR alpha chain in PDB 1sje.
2.40.50.110
Class: Mainly Beta
Architecture: Beta Barrel
Topology: OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homology: OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Occurring in:
  1. Enterotoxin type C-3
1 copy of CATH domain 2.40.50.110 (OB fold (Dihydrolipoamide Acetyltransferase, E2P)) in Enterotoxin type C-3 in PDB 1sje.
SCOP SCOP annotations
54453
Class: Alpha and beta proteins (a+b)
Fold: MHC antigen-recognition domain
Superfamily: MHC antigen-recognition domain
Occurring in:
  1. HLA class II histocompatibility antigen, DR alpha chain
  2. HLA class II histocompatibility antigen, DRB1-1 beta chain
2 copies of SCOP domain 54453 (MHC antigen-recognition domain) in HLA class II histocompatibility antigen, DRB1-1 beta chain in PDB 1sje.
1 copy of SCOP domain 54453 (MHC antigen-recognition domain) in HLA class II histocompatibility antigen, DR alpha chain in PDB 1sje.
48942
Class: All beta proteins
Fold: Immunoglobulin-like beta-sandwich
Superfamily: Immunoglobulin
Occurring in:
  1. HLA class II histocompatibility antigen, DR alpha chain
  2. HLA class II histocompatibility antigen, DRB1-1 beta chain
2 copies of SCOP domain 48942 (C1 set domains (antibody constant domain-like)) in HLA class II histocompatibility antigen, DRB1-1 beta chain in PDB 1sje.
1 copy of SCOP domain 48942 (C1 set domains (antibody constant domain-like)) in HLA class II histocompatibility antigen, DR alpha chain in PDB 1sje.
50219
Class: All beta proteins
Fold: OB-fold
Superfamily: Bacterial enterotoxins
Occurring in:
  1. Enterotoxin type C-3
1 copy of SCOP domain 50219 (Superantigen toxins, N-terminal domain) in Enterotoxin type C-3 in PDB 1sje.
54335
Class: Alpha and beta proteins (a+b)
Fold: beta-Grasp (ubiquitin-like)
Superfamily: Superantigen toxins, C-terminal domain
Occurring in:
  1. Enterotoxin type C-3
1 copy of SCOP domain 54335 (Superantigen toxins, C-terminal domain) in Enterotoxin type C-3 in PDB 1sje.