Crystal Structure of PGT121 Fab Bound to a complex-type sialylated N-glycan
Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage
| Chains | Domain Info | Class | Fold | Superfamily | Family | Domain | Species | Provenance Source (Version) |
|---|---|---|---|---|---|---|---|---|
| B [auth L] | d4fqcl1 | All beta proteins | Immunoglobulin-like beta-sandwich | Immunoglobulin | automated matches | automated matches | human (Homo sapiens ) [TaxId: 9606 ], | SCOPe (2.08) |
| A [auth H] | d4fqch_ | All beta proteins | Immunoglobulin-like beta-sandwich | Immunoglobulin | automated matches | automated matches | human (Homo sapiens ) [TaxId: 9606 ], | SCOPe (2.08) |
Domain Annotation: ECOD Classification ECOD Database Homepage
| Chains | Family Name | Domain Identifier | Architecture | Possible Homology | Homology | Topology | Family | Provenance Source (Version) |
|---|---|---|---|---|---|---|---|---|
| B [auth L] | e4fqcL3 | A: Subtilisin-like | X: Subtilisin-like | H: Subtilisin-like | T: Ig_2 | F: | ECOD (20:10:01) | |
| A [auth H] | e4fqcH1 | A: beta-Grasp | X: Ubiquitin-related | H: Ubiquitin-like | T: FtsJ | F: | ECOD (20:10:01) |
Domain Annotation: CATH CATH Database Homepage
| Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
|---|---|---|---|---|---|---|
| B [auth L] | 2.60.40.10 | Mainly Beta | Sandwich | Immunoglobulin-like | Immunoglobulins | CATH (4.3.0) |
| A [auth H] | 2.60.40.10 | Mainly Beta | Sandwich | Immunoglobulin-like | Immunoglobulins | CATH (4.3.0) |
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 |
|---|---|---|---|---|---|---|---|---|
| B [auth L] | PGT121 mAb, anti-gp120 [HIV-1], broadly neutralizing | L-LAMBDA | Homo sapiens (human) | IGLV3-21*01, IGLJ3*02, IGLC2*01, IGLC2*02, IGLC3*04 | V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA | IG | FAB-GAMMA-1_LAMBDA | IMGT (202609-0) |
| A [auth H] | PGT121 mAb, anti-gp120 [HIV-1], broadly neutralizing | VH-CH1 | Homo sapiens (human) | IGHV4-59*01, IGHV4-59*08, IGHV4-4*08, IGHJ6*03, IGHG1*03 | V-DOMAIN VH, C-DOMAIN CH1 | IG | FAB-GAMMA-1_LAMBDA | IMGT (202609-0) |
SAbDab Antibody Annotation SAbDab Database Homepage
| Chain | Chain Class | Chain Subclass | Chain Type | Antigen Name(s) | Provenance Source |
|---|---|---|---|---|---|
| B [auth L] | Light Chain | IGLV3 | Lambda | - | SAbDab (2026-03-13) |
| A [auth H] | Heavy Chain | IGHV4 | - | - | SAbDab (2026-03-13) |
Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage
| Chain | Name | Target | Provenance Source |
|---|---|---|---|
| B [auth L] | Elipovimab | HIV-1 gp120 | Therapeutic SAbDab (2026-03-13) |
| A [auth H] | Elipovimab | HIV-1 gp120 | Therapeutic SAbDab (2026-03-13) |














