The complex between human IgE-Fc and two anti-IgE Fab fragments
Domain Annotation: ECOD Classification ECOD Database Homepage
| Chains | Family Name | Domain Identifier | Architecture | Possible Homology | Homology | Topology | Family | Provenance Source (Version) |
|---|---|---|---|---|---|---|---|---|
| E [auth L] | ProQ | e5g64L1 | A: a/b three-layered sandwiches | X: HAD domain-like | H: Class I glutamine amidotransferase-like | T: CheY-like | F: ProQ | ECOD (v294.1) |
| F [auth M] | ProQ | e5g64M1 | A: a/b three-layered sandwiches | X: HAD domain-like | H: Class I glutamine amidotransferase-like | T: CheY-like | F: ProQ | ECOD (v294.1) |
| C [auth H] | ProQ | e5g64H1 | A: a/b three-layered sandwiches | X: HAD domain-like | H: Class I glutamine amidotransferase-like | T: CheY-like | F: ProQ | ECOD (v294.1) |
| D [auth I] | ProQ | e5g64I1 | A: a/b three-layered sandwiches | X: HAD domain-like | H: Class I glutamine amidotransferase-like | T: CheY-like | F: ProQ | ECOD (v294.1) |
| A | ProQ | e5g64A1 | A: a/b three-layered sandwiches | X: HAD domain-like | H: Class I glutamine amidotransferase-like | T: CheY-like | F: ProQ | ECOD (v294.1) |
| B | ProQ | e5g64B1 | A: a/b three-layered sandwiches | X: HAD domain-like | H: Class I glutamine amidotransferase-like | T: CheY-like | F: ProQ | ECOD (v294.1) |
Domain Annotation: CATH CATH Database Homepage
| Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
|---|---|---|---|---|---|---|
| E [auth L] | 2.60.40.10 | Mainly Beta | Sandwich | Immunoglobulin-like | Immunoglobulins | CATH (4.3.0) |
| F [auth M] | 2.60.40.10 | Mainly Beta | Sandwich | Immunoglobulin-like | Immunoglobulins | CATH (4.3.0) |
| C [auth H] | 2.60.40.10 | Mainly Beta | Sandwich | Immunoglobulin-like | Immunoglobulins | CATH (4.3.0) |
| D [auth I] | 2.60.40.10 | Mainly Beta | Sandwich | Immunoglobulin-like | Immunoglobulins | CATH (4.3.0) |
| A | 2.60.40.10 | Mainly Beta | Sandwich | Immunoglobulin-like | Immunoglobulins | CATH (utative) |
| B | 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 |
|---|---|---|---|---|---|---|---|---|
| E [auth L], F [auth M] | anti-IgE Fab | L-KAPPA | Homo sapiens (human) | IGKV1-39*01, IGKV1D-39*01, IGKJ1*01, IGKJ2*01, IGKC*01 | V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA | IG | FAB-GAMMA-1_KAPPA | IMGT (202615-0) |
| C [auth H], D [auth I] | anti-IgE Fab | VH-CH1 | Homo sapiens (human) | IGHV3-66*01, IGHV3-66*02, IGHV3-66*04, IGHJ3*01, IGHG1*01, IGHG1*02, IGHG1*04, IGHG1*05 | V-DOMAIN VH, C-DOMAIN CH1 | IG | FAB-GAMMA-1_KAPPA | IMGT (202615-0) |
| Fc IgE (epsilon) | CH2-CH3 | Homo sapiens (human) | IGHE*01, IGHE*02, IGHE*04 | C-DOMAIN CH2, C-DOMAIN CH3, C-DOMAIN CH4 | IG | CH2-CH3 | IMGT (202615-0) |
SAbDab Antibody Annotation SAbDab Database Homepage
| Chain | Chain Class | Chain Subclass | Chain Type | Antigen Name(s) | Provenance Source |
|---|---|---|---|---|---|
| E [auth L], F [auth M] | Light Chain | IGKV1 | Kappa | ig epsilon chain c region | SAbDab (2026-04-24) |
| C [auth H], D [auth I] | Heavy Chain | IGHV3 | - | ig epsilon chain c region | SAbDab (2026-04-24) |
Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage
| Chain | Name | Target | Provenance Source |
|---|---|---|---|
| E [auth L], F [auth M] | Omalizumab | IGHE | Therapeutic SAbDab (2026-04-24) |
| C [auth H], D [auth I] | Omalizumab | IGHE | Therapeutic SAbDab (2026-04-24) |
