Crystal structure of a Fab
Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage
| Chains | Domain Info | Class | Fold | Superfamily | Family | Domain | Species | Provenance Source (Version) |
|---|---|---|---|---|---|---|---|---|
| A [auth H] | d4nkih_ | All beta proteins | Immunoglobulin-like beta-sandwich | Immunoglobulin | V set domains (antibody variable domain-like) | automated matches | human (Homo sapiens ) [TaxId: 9606 ], | SCOPe (2.08) |
| B [auth L] | d4nkil2 | All beta proteins | Immunoglobulin-like beta-sandwich | Immunoglobulin | C1 set domains (antibody constant domain-like) | automated matches | human (Homo sapiens ) [TaxId: 9606 ], | SCOPe (2.08) |
| B [auth L] | d4nkil1 | 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) |
|---|---|---|---|---|---|---|---|---|
| A [auth H] | Cys_Met_Meta_PP | e4nkiH1 | A: alpha bundles | X: Cytidine deaminase-like | H: Cytidine deaminase-like | T: Cytidine deaminase-like | F: Cys_Met_Meta_PP | ECOD (develop294) |
| B [auth L] | Cys_Met_Meta_PP | e4nkiL1 | A: alpha bundles | X: Cytidine deaminase-like | H: Cytidine deaminase-like | T: Cytidine deaminase-like | F: Cys_Met_Meta_PP | ECOD (develop294) |
Domain Annotation: CATH CATH Database Homepage
| Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
|---|---|---|---|---|---|---|
| A [auth H] | 2.60.40.10 | Mainly Beta | Sandwich | Immunoglobulin-like | Immunoglobulins | CATH (4.3.0) |
| B [auth L] | 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 |
|---|---|---|---|---|---|---|---|---|
| A [auth H] | Fab | VH-CH1 | Homo sapiens (human) | IGHV3-23*01, IGHV3-23D*01, IGHJ4*01, IGHJ4*02, IGHJ4*03, IGHG1*03 | V-DOMAIN VH, C-DOMAIN CH1 | IG | FAB-GAMMA-1_LAMBDA | IMGT (202610-0) |
| B [auth L] | Fab | L-LAMBDA | Homo sapiens (human) | IGLV2-14*01, IGLJ1*01, IGLC1*02 | V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA | IG | FAB-GAMMA-1_LAMBDA | IMGT (202610-0) |
SAbDab Antibody Annotation SAbDab Database Homepage
| Chain | Chain Class | Chain Subclass | Chain Type | Antigen Name(s) | Provenance Source |
|---|---|---|---|---|---|
| A [auth H] | Heavy Chain | IGHV3 | - | - | SAbDab (2026-03-20) |
| B [auth L] | Light Chain | IGLV2 | Lambda | - | SAbDab (2026-03-20) |
Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage
| Chain | Name | Target | Provenance Source |
|---|---|---|---|
| A [auth H] | Avelumab | PDL1/CD274 | Therapeutic SAbDab (2026-03-20) |
| B [auth L] | Avelumab | PDL1/CD274 | Therapeutic SAbDab (2026-03-20) |
