B41 SOSIP.664 in complex with soluble CD4 (D1-D2), the co-receptor mimicking antibody 21c and the broadly neutralizing antibody 8ANC195
Domain Annotation: SCOP2 Classification SCOP2 Database Homepage
| Chains | Type | Family Name | Domain Identifier | Family Identifier | Provenance Source (Version) |
|---|---|---|---|---|---|
| A | SCOP2B Superfamily | Virus ectodomain | 8085612 | 3001628 | SCOP2B (2022-06-29) |
| B | SCOP2B Superfamily | Virus ectodomain | 8085612 | 3001628 | SCOP2B (2022-06-29) |
| C | SCOP2B Superfamily | Virus ectodomain | 8085612 | 3001628 | SCOP2B (2022-06-29) |
| D | SCOP2B Superfamily | gp120 core | 8097270 | 3001390 | SCOP2B (2022-06-29) |
| E | SCOP2B Superfamily | gp120 core | 8097270 | 3001390 | SCOP2B (2022-06-29) |
| F | SCOP2B Superfamily | gp120 core | 8097270 | 3001390 | SCOP2B (2022-06-29) |
| G | SCOP2B Superfamily | Immunoglobulin (Ig) domain-like | 8054493 | 3000071 | SCOP2B (2022-06-29) |
| H | SCOP2B Superfamily | Immunoglobulin (Ig) domain-like | 8054493 | 3000071 | SCOP2B (2022-06-29) |
| I | 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) |
|---|---|---|---|---|---|---|---|---|
| A | APH | e6eduA1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: APH | ECOD (v294.1) |
| B | e6eduB1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| C | e6eduC1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| D | APH | e6eduD1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: APH | ECOD (v294.1) |
| E | e6eduE1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| F | e6eduF1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| G | e6eduG1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| H | e6eduH1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| I | e6eduI1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| J | APH | e6eduJ1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: APH | ECOD (v294.1) |
| L | e6eduL1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| N | e6eduN1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| K | APH | e6eduK1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: APH | ECOD (v294.1) |
| M | e6eduM1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| O | e6eduO1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| P | e6eduP1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| R | e6eduR1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| T | e6eduT1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| Q | e6eduQ1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| S | e6eduS1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) | |
| U | e6eduU1 | A: a/b three-layered sandwiches | X: PriB N-terminal domain-like | H: HTH | T: SH3 | F: | ECOD (v294.1) |
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 |
|---|---|---|---|---|---|---|---|---|
| Fab 21c, broadly neutralizing antibody | VH-CH1 | Homo sapiens (human) | IGHV1-24*01, IGHJ4*01, IGHJ4*02, IGHJ4*03, IGHG1*01, IGHG1*02, IGHG1*04, IGHG1*05, IGHG1*12, IGHG1*14, IGHG1*13, IGHG1*09, IGHG1*10, IGHG1*07, IGHG1*11 | V-DOMAIN VH, C-DOMAIN CH1 | IG | FAB-GAMMA-1_LAMBDA | IMGT (202611-0) | |
| Fab 21c, broadly neutralizing antibody | L-LAMBDA | Homo sapiens (human) | IGLV1-51*01, IGLJ2*01, IGLJ3*02, IGLJ3*01, IGLC2*01, IGLC2*02, IGLC3*04 | V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA | IG | FAB-GAMMA-1_LAMBDA | IMGT (202611-0) | |
| Fab 8ANC195, broadly neutralizing antibody | VH-CH1 | Homo sapiens (human) | IGHV1-69*01, IGHV1-69*04, IGHV1-69*06, IGHV1-69*09, IGHV1-69*10, IGHV1-69*11, IGHV1-69*12, IGHV1-69*13, IGHV1-69*14, IGHV1-69D*01, IGHV1-69*15, IGHV1-69*17, IGHJ5*01, IGHG1*03, IGHG1*08, IGHG1*06 | V-DOMAIN VH, C-DOMAIN CH1 | IG | FAB-GAMMA-1_KAPPA | IMGT (202611-0) | |
| Fab 8ANC195, broadly neutralizing antibody | L-KAPPA | Homo sapiens (human) | IGKV1-5*01, IGKV1-5*02, IGKV1-5*03, IGKJ1*01, IGKC*01 | V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA | IG | FAB-GAMMA-1_KAPPA | IMGT (202611-0) |
SAbDab Antibody Annotation SAbDab Database Homepage
| Chain | Chain Class | Chain Subclass | Chain Type | Antigen Name(s) | Provenance Source |
|---|---|---|---|---|---|
| Heavy Chain | IGHV1 | - | envelope glycoprotein gp160 | t-cell surface glycoprotein cd4 | SAbDab (2026-03-27) | |
| Light Chain | IGLV1 | Lambda | envelope glycoprotein gp160 | t-cell surface glycoprotein cd4 | SAbDab (2026-03-27) | |
| Light Chain | IGKV1 | Kappa | envelope glycoprotein gp160 | envelope glycoprotein gp160 | SAbDab (2026-03-27) |
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
| Chains | Accession | Name | Type |
|---|---|---|---|
| IPR000777 | Human immunodeficiency virus 1, envelope glycoprotein Gp120 | Domain | |
| IPR036377 | Gp120 core superfamily | Homologous Superfamily | |
| IPR000328 | Retroviral envelope protein GP41-like | Domain | |
| IPR037527 | Envelope glycoprotein Gp160 | Family | |
| IPR000777 | Human immunodeficiency virus 1, envelope glycoprotein Gp120 | Domain | |
| IPR036377 | Gp120 core superfamily | Homologous Superfamily | |
| IPR000328 | Retroviral envelope protein GP41-like | Domain | |
| IPR037527 | Envelope glycoprotein Gp160 | Family | |
| IPR021963 | T cell CD4 receptor C-terminal region | Domain | |
| IPR036179 | Immunoglobulin-like domain superfamily | Homologous Superfamily | |
| IPR013106 | Immunoglobulin V-set domain | Domain | |
| IPR000973 | T-cell surface antigen CD4 | Family | |
| IPR003599 | Immunoglobulin domain subtype | Domain | |
| IPR008424 | Immunoglobulin C2-set | Domain | |
| IPR013151 | Immunoglobulin-like beta-sandwich domain | Domain | |
| IPR015274 | CD4, extracellular | Domain | |
| IPR013783 | Immunoglobulin-like fold | Homologous Superfamily | |
| IPR007110 | Immunoglobulin-like domain | Domain | |
| IPR003598 | Immunoglobulin subtype 2 | Domain |














