Asymmetrically open conformational state (Class I) 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) |
|---|---|---|---|---|---|
| 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) |
| D | SCOP2B Superfamily | Immunoglobulin (Ig) domain-like | 8054493 | 3000071 | SCOP2B (2022-06-29) |
| 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) |
Domain Annotation: ECOD Classification ECOD Database Homepage
| Chains | Family Name | Domain Identifier | Architecture | Possible Homology | Homology | Topology | Family | Provenance Source (Version) |
|---|---|---|---|---|---|---|---|---|
| E | V-set_9 | e6u0lE1 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: V-set_9 | ECOD (1.6) |
| F | V-set_9 | e6u0lF1 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: V-set_9 | ECOD (1.6) |
| D | V-set_9 | e6u0lD1 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: V-set_9 | ECOD (1.6) |
| G [auth H] | V-set_8 | e6u0lH1 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: V-set_8 | ECOD (1.6) |
| H [auth I] | V-set_8 | e6u0lI1 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: V-set_8 | ECOD (1.6) |
| K [auth P] | V-set_8 | e6u0lP1 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: V-set_8 | ECOD (1.6) |
| I [auth J] | V-set_3 | e6u0lJ1 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: V-set_3 | ECOD (1.6) |
| L [auth Q] | V-set_3 | e6u0lQ1 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: V-set_3 | ECOD (1.6) |
| J [auth L] | V-set_3 | e6u0lL1 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: V-set_3 | ECOD (1.6) |
| M [auth X] | GP41_1st | e6u0lX1 | A: a+b duplicates or obligate multimers | X: MPER trimer (From Topology) | H: MPER trimer (From Topology) | T: MPER trimer | F: GP41_1st | ECOD (1.6) |
| N [auth Y] | GP41_1st | e6u0lY1 | A: a+b duplicates or obligate multimers | X: MPER trimer (From Topology) | H: MPER trimer (From Topology) | T: MPER trimer | F: GP41_1st | ECOD (1.6) |
| O [auth Z] | GP41_1st | e6u0lZ1 | A: a+b duplicates or obligate multimers | X: MPER trimer (From Topology) | H: MPER trimer (From Topology) | T: MPER trimer | F: GP41_1st | ECOD (1.6) |
| A | GP120_3rd | e6u0lA2 | A: a+b two layers | X: Ribosomal protein L31e-like | H: Ribosomal protein L31e/gp120 outer domain (From Topology) | T: Ribosomal protein L31e/gp120 outer domain | F: GP120_3rd | ECOD (1.6) |
| A | GP120_1st | e6u0lA1 | A: a+b two layers | X: gp120 inner domain (From Topology) | H: gp120 inner domain (From Topology) | T: gp120 inner domain | F: GP120_1st | ECOD (1.6) |
| B | GP120_3rd | e6u0lB1 | A: a+b two layers | X: Ribosomal protein L31e-like | H: Ribosomal protein L31e/gp120 outer domain (From Topology) | T: Ribosomal protein L31e/gp120 outer domain | F: GP120_3rd | ECOD (1.6) |
| B | GP120_1st | e6u0lB2 | A: a+b two layers | X: gp120 inner domain (From Topology) | H: gp120 inner domain (From Topology) | T: gp120 inner domain | F: GP120_1st | ECOD (1.6) |
| C | GP120_3rd | e6u0lC1 | A: a+b two layers | X: Ribosomal protein L31e-like | H: Ribosomal protein L31e/gp120 outer domain (From Topology) | T: Ribosomal protein L31e/gp120 outer domain | F: GP120_3rd | ECOD (1.6) |
| C | GP120_1st | e6u0lC2 | A: a+b two layers | X: gp120 inner domain (From Topology) | H: gp120 inner domain (From Topology) | T: gp120 inner domain | F: GP120_1st | ECOD (1.6) |
Domain Annotation: CATH CATH Database Homepage
| Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
|---|---|---|---|---|---|---|
| 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) |
| D | 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 |
|---|---|---|---|---|---|---|---|---|
| CD4 | 1V-1C-LIKE | Homo sapiens (human) | CD4 | V-LIKE-DOMAIN V-LIKE, C-LIKE-DOMAIN C-LIKE | RPI | 1V-1C-LIKE | IMGT (202548-0) | |
| G [auth H], H [auth I], K [auth P] | Fab E51, anti-gp120 CD4 binding site (CD4bs) [HIV-1], | VH-CH1 | Homo sapiens (human) | IGHV1-69*01, IGHV1-69*12, IGHV1-69*13, IGHV1-69D*01, IGHJ3*01, IGHG1*03, IGHG1*08, IGHG1*06 | V-DOMAIN VH, C-DOMAIN CH1 | IG | FAB-GAMMA-1_LAMBDA | IMGT (202548-0) |
| I [auth J], J [auth L], L [auth Q] | Fab E51, anti-gp120 CD4 binding site (CD4bs) [HIV-1], | L-LAMBDA | Homo sapiens (human) | IGLV1-51*02, IGLJ2*01, IGLJ3*01, IGLC2*01, IGLC2*02, IGLC3*04 | V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA | IG | FAB-GAMMA-1_LAMBDA | IMGT (202548-0) |
SAbDab Antibody Annotation SAbDab Database Homepage
| Chain | Chain Class | Chain Subclass | Chain Type | Antigen Name(s) | Provenance Source |
|---|---|---|---|---|---|
| G [auth H], H [auth I], K [auth P] | Heavy Chain | IGHV1 | - | envelope glycoprotein gp160 | SAbDab (2025-12-12) |
| I [auth J], J [auth L], L [auth Q] | Light Chain | IGLV1 | Lambda | envelope glycoprotein gp160 | SAbDab (2025-12-12) |
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 | |
| M [auth X], N [auth Y], O [auth Z] | PF00517 | Retroviral envelope protein (GP41) | Retroviral envelope protein | - | Family |
| PF00516 | Envelope glycoprotein GP120 (GP120) | Envelope glycoprotein GP120 | The envelope glycoprotein Gp160 of HIV1 is cleaved into the surface protein Gp120 and the transmembrane protein Gp41. The entry of HIV requires interaction of viral GP120 with the CD4 glycoprotein (Swiss:P01730) and a chemokine receptor on the cell s ... | 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 |














