Asymmetrically open conformational state (Class II) of HIV-1 Env trimer BG505 SOSIP.664 in complex with sCD4 and E51 Fab
External Resource: Annotation
- Domain Annotation: SCOP2 Classification
- Domain Annotation: ECOD Classification
- Domain Annotation: CATH
- IMGT Antibody Annotation
- SAbDab Antibody Annotation
- Protein Family Annotation
- Gene Ontology: Gene Product Annotation
- InterPro: Protein Family Classification
- Pharos: Disease Associations
- Protein Modification Annotation
Domain Annotation: SCOP2 Classification SCOP2 Database Homepage
| Chains | Type | Family Name | Domain Identifier | Family Identifier | Provenance Source (Version) |
|---|---|---|---|---|---|
| M [auth X] | SCOP2B Superfamily | Virus ectodomain | 8085614 | 3001628 | SCOP2B (2022-06-29) |
| N [auth Y] | SCOP2B Superfamily | Virus ectodomain | 8085614 | 3001628 | SCOP2B (2022-06-29) |
| O [auth Z] | SCOP2B Superfamily | Virus ectodomain | 8085614 | 3001628 | SCOP2B (2022-06-29) |
| D | SCOP2B Superfamily | Immunoglobulin (Ig) domain-like | 8054493 | 3000071 | SCOP2B (2022-06-29) |
| E | SCOP2B Superfamily | Immunoglobulin (Ig) domain-like | 8054493 | 3000071 | SCOP2B (2022-06-29) |
| F | SCOP2B Superfamily | Immunoglobulin (Ig) domain-like | 8054493 | 3000071 | 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) |
|---|---|---|---|---|---|---|---|---|
| M [auth X] | Parvo_coat | e6u0nX1 | A: alpha bundles | X: P-loop domains-like | H: DUF1107-like | T: DUF1107-like | F: Parvo_coat | ECOD (develop294) |
| N [auth Y] | Parvo_coat | e6u0nY1 | A: alpha bundles | X: P-loop domains-like | H: DUF1107-like | T: DUF1107-like | F: Parvo_coat | ECOD (develop294) |
| O [auth Z] | Parvo_coat | e6u0nZ1 | A: alpha bundles | X: P-loop domains-like | H: DUF1107-like | T: DUF1107-like | F: Parvo_coat | ECOD (develop294) |
| I [auth J] | Parvo_coat | e6u0nJ1 | A: alpha bundles | X: P-loop domains-like | H: DUF1107-like | T: DUF1107-like | F: Parvo_coat | ECOD (develop294) |
| J [auth L] | Parvo_coat | e6u0nL1 | A: alpha bundles | X: P-loop domains-like | H: DUF1107-like | T: DUF1107-like | F: Parvo_coat | ECOD (develop294) |
| L [auth Q] | Parvo_coat | e6u0nQ1 | A: alpha bundles | X: P-loop domains-like | H: DUF1107-like | T: DUF1107-like | F: Parvo_coat | ECOD (develop294) |
| G [auth H] | Parvo_coat | e6u0nH1 | A: alpha bundles | X: P-loop domains-like | H: DUF1107-like | T: DUF1107-like | F: Parvo_coat | ECOD (develop294) |
| H [auth I] | Parvo_coat | e6u0nI1 | A: alpha bundles | X: P-loop domains-like | H: DUF1107-like | T: DUF1107-like | F: Parvo_coat | ECOD (develop294) |
| K [auth P] | Parvo_coat | e6u0nP1 | A: alpha bundles | X: P-loop domains-like | H: DUF1107-like | T: DUF1107-like | F: Parvo_coat | ECOD (develop294) |
| D | Parvo_coat | e6u0nD1 | A: alpha bundles | X: P-loop domains-like | H: DUF1107-like | T: DUF1107-like | F: Parvo_coat | ECOD (develop294) |
| E | Parvo_coat | e6u0nE1 | A: alpha bundles | X: P-loop domains-like | H: DUF1107-like | T: DUF1107-like | F: Parvo_coat | ECOD (develop294) |
| F | Parvo_coat | e6u0nF1 | A: alpha bundles | X: P-loop domains-like | H: DUF1107-like | T: DUF1107-like | F: Parvo_coat | ECOD (develop294) |
| A | Parvo_coat | e6u0nA1 | A: alpha bundles | X: P-loop domains-like | H: DUF1107-like | T: DUF1107-like | F: Parvo_coat | ECOD (develop294) |
| B | Parvo_coat | e6u0nB1 | A: alpha bundles | X: P-loop domains-like | H: DUF1107-like | T: DUF1107-like | F: Parvo_coat | ECOD (develop294) |
| C | Parvo_coat | e6u0nC1 | A: alpha bundles | X: P-loop domains-like | H: DUF1107-like | T: DUF1107-like | F: Parvo_coat | ECOD (develop294) |
Domain Annotation: CATH CATH Database Homepage
| Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
|---|---|---|---|---|---|---|
| D | 2.60.40.10 | Mainly Beta | Sandwich | Immunoglobulin-like | Immunoglobulins | CATH (utative) |
| E | 2.60.40.10 | Mainly Beta | Sandwich | Immunoglobulin-like | Immunoglobulins | CATH (utative) |
| F | 2.60.40.10 | Mainly Beta | Sandwich | Immunoglobulin-like | Immunoglobulins | CATH (utative) |
| A | 2.170.40.20 | Mainly Beta | Beta Complex | HIV Envelope Protein Gp120 | Chain G | CATH (utative) |
| B | 2.170.40.20 | Mainly Beta | Beta Complex | HIV Envelope Protein Gp120 | Chain G | CATH (utative) |
| C | 2.170.40.20 | Mainly Beta | Beta Complex | HIV Envelope Protein Gp120 | Chain G | CATH (utative) |
IMGT Antibody Annotation IMGT Database Homepage
| Chain | Protein Name | Description | Organism Name | Gene Allele Name(s) | Domain Name(s) | Receptor Type | Receptor Description | Provenance Source |
|---|---|---|---|---|---|---|---|---|
| I [auth J], J [auth L], L [auth Q] | Fab E51, anti-gp120 CD4 binding site (CD4bs) [HIV-1], | null | Homo sapiens (human) | - | - | IG | FAB-GAMMA-1_LAMBDA | IMGT (202610-0) |
| G [auth H], H [auth I], K [auth P] | CD4 | null | Homo sapiens (human) | - | - | IG | FAB-GAMMA-1_LAMBDA | IMGT (202610-0) |
| neutralizing | 1V-1C-LIKE | Homo sapiens (human) | CD4 | V-LIKE-DOMAIN V-LIKE, C-LIKE-DOMAIN C-LIKE | RPI | 1V-1C-LIKE | IMGT (202610-0) |
SAbDab Antibody Annotation SAbDab Database Homepage
| Chain | Chain Class | Chain Subclass | Chain Type | Antigen Name(s) | Provenance Source |
|---|---|---|---|---|---|
| I [auth J], J [auth L], L [auth Q] | Light Chain | IGLV1 | Lambda | envelope glycoprotein gp120 | SAbDab (2026-03-20) |
| G [auth H], H [auth I], K [auth P] | Heavy Chain | IGHV1 | - | envelope glycoprotein gp120 | SAbDab (2026-03-20) |
Protein Family Annotation Pfam Database Homepage
| Chains | Accession | Name | Description | Comments | Source |
|---|---|---|---|---|---|
| PF00047 | Immunoglobulin domain (ig) | Immunoglobulin domain | Members of the immunoglobulin superfamily are found in hundreds of proteins of different functions. Examples include antibodies, the giant muscle kinase titin and receptor tyrosine kinases. Immunoglobulin-like domains may be involved in protein-prote ... | Domain | |
Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage
InterPro: Protein Family Classification InterPro Database Homepage
Pharos: Disease Associations Pharos Homepage Annotation
Protein Modification Annotation
| Modified Residue(s) | ||
|---|---|---|
| Chain | Residue(s) | Description |
| G [auth H], H [auth I], K [auth P] | TYS | Parent Component: TYR :  AA0172 :  O4'-sulfo-L-tyrosine MOD:00181 |














