High-resolution structure of two tandem B domains of staphylococcal protein A connected by the conserved linker
Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage
| Chains | Domain Info | Class | Fold | Superfamily | Family | Domain | Species | Provenance Source (Version) |
|---|---|---|---|---|---|---|---|---|
| B [auth X] | d4npfx1 | All alpha proteins | immunoglobulin/albumin-binding domain-like | Bacterial immunoglobulin/albumin-binding domains | Immunoglobulin-binding protein A modules | automated matches | (Staphylococcus aureus ) [TaxId: 1280 ], | SCOPe (2.08) |
| A [auth Y] | d4npfy1 | All alpha proteins | immunoglobulin/albumin-binding domain-like | Bacterial immunoglobulin/albumin-binding domains | Immunoglobulin-binding protein A modules | automated matches | (Staphylococcus aureus ) [TaxId: 1280 ], | SCOPe (2.08) |
Domain Annotation: SCOP2 Classification SCOP2 Database Homepage
| Chains | Type | Family Name | Domain Identifier | Family Identifier | Provenance Source (Version) |
|---|---|---|---|---|---|
| B [auth X] | SCOP2B Superfamily | Bacterial immunoglobulin/albumin-binding domains | 8091639 | 3001373 | SCOP2B (2022-06-29) |
| A [auth Y] | SCOP2B Superfamily | Bacterial immunoglobulin/albumin-binding domains | 8091639 | 3001373 | SCOP2B (2022-06-29) |
Domain Annotation: ECOD Classification ECOD Database Homepage
| Chains | Family Name | Domain Identifier | Architecture | Possible Homology | Homology | Topology | Family | Provenance Source (Version) |
|---|---|---|---|---|---|---|---|---|
| B [auth X] | B | e4npfX2 | A: alpha bundles | X: immunoglobulin/albumin-binding domain-like | H: Bacterial immunoglobulin/albumin-binding domains (From Topology) | T: Bacterial immunoglobulin/albumin-binding domains | F: B | ECOD (1.6) |
| A [auth Y] | B | e4npfY2 | A: alpha bundles | X: immunoglobulin/albumin-binding domain-like | H: Bacterial immunoglobulin/albumin-binding domains (From Topology) | T: Bacterial immunoglobulin/albumin-binding domains | F: B | ECOD (1.6) |
Domain Annotation: CATH CATH Database Homepage
| Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
|---|---|---|---|---|---|---|
| B [auth X] | 1.20.5.420 | Mainly Alpha | Up-down Bundle | Single alpha-helices involved in coiled-coils or other helix-helix interfaces | Immunoglobulin FC, subunit C | CATH (4.3.0) |
| A [auth Y] | 1.20.5.420 | Mainly Alpha | Up-down Bundle | Single alpha-helices involved in coiled-coils or other helix-helix interfaces | Immunoglobulin FC, subunit C | CATH (4.3.0) |
Protein Family Annotation Pfam Database Homepage
| Chains | Accession | Name | Description | Comments | Source |
|---|---|---|---|---|---|
| A [auth Y], B [auth X] | PF02216 | B domain (B) | B domain | This family contains the B domain of Staphylococcal protein A, which specifically binds to the Fc portion of immunoglobulin G. | Domain |
Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage
| Chains | Polymer | Molecular Function | Biological Process | Cellular Component |
|---|---|---|---|---|
| A [auth Y], B [auth X] | Immunoglobulin G-binding protein A | - |
InterPro: Protein Family Classification InterPro Database Homepage
| Chains | Accession | Name | Type |
|---|---|---|---|
| A [auth Y], B [auth X] | IPR009063 | Immunoglobulin/albumin-binding domain superfamily | Homologous Superfamily |
| A [auth Y], B [auth X] | IPR005877 | YSIRK Gram-positive signal peptide | Domain |
| A [auth Y], B [auth X] | IPR036779 | LysM domain superfamily | Homologous Superfamily |
| A [auth Y], B [auth X] | IPR005038 | Octapeptide repeat | Repeat |
| A [auth Y], B [auth X] | IPR003132 | Protein A, Ig-binding domain | Domain |
| A [auth Y], B [auth X] | IPR018392 | LysM domain | Domain |
| A [auth Y], B [auth X] | IPR019931 | LPXTG cell wall anchor domain | Domain |
