Cryo-EM structure of full-length insulin receptor bound to 4 insulin. 3D refinement was focused on the extracellular region.
Domain Annotation: SCOP2 Classification SCOP2 Database Homepage
| Chains | Type | Family Name | Domain Identifier | Family Identifier | Provenance Source (Version) |
|---|---|---|---|---|---|
| A | SCOP2B Superfamily | L domain-like | 8032830 | 3001010 | SCOP2B (2022-06-29) |
| A | SCOP2B Superfamily | Growth factor receptor domain-like | 8032837 | 3000398 | SCOP2B (2022-06-29) |
| A | SCOP2B Superfamily | L domain-like | 8032832 | 3001010 | SCOP2B (2022-06-29) |
| B [auth C] | SCOP2B Superfamily | L domain-like | 8032830 | 3001010 | SCOP2B (2022-06-29) |
| B [auth C] | SCOP2B Superfamily | Growth factor receptor domain-like | 8032837 | 3000398 | SCOP2B (2022-06-29) |
| B [auth C] | SCOP2B Superfamily | L domain-like | 8032832 | 3001010 | 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 | fn3_1 | e6pxvA4 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: fn3_1 | ECOD (1.6) |
| A | fn3 | e6pxvA6 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: fn3 | ECOD (1.6) |
| A | Recep_L_domain | e6pxvA5 | A: beta duplicates or obligate multimers | X: Single-stranded right-handed beta-helix | H: Leucine-rich repeats (From Topology) | T: Leucine-rich repeats | F: Recep_L_domain | ECOD (1.6) |
| A | Furin-like_5 | e6pxvA1 | A: few secondary structure elements | X: EGF-like | H: Growth factor receptor domain (From Topology) | T: Growth factor receptor domain | F: Furin-like_5 | ECOD (1.6) |
| B [auth C] | fn3_1 | e6pxvC6 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: fn3_1 | ECOD (1.6) |
| B [auth C] | fn3 | e6pxvC2 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: fn3 | ECOD (1.6) |
| B [auth C] | Recep_L_domain | e6pxvC5 | A: beta duplicates or obligate multimers | X: Single-stranded right-handed beta-helix | H: Leucine-rich repeats (From Topology) | T: Leucine-rich repeats | F: Recep_L_domain | ECOD (1.6) |
| B [auth C] | Furin-like_5 | e6pxvC3 | A: few secondary structure elements | X: EGF-like | H: Growth factor receptor domain (From Topology) | T: Growth factor receptor domain | F: Furin-like_5 | ECOD (1.6) |
| C [auth D] | Insulin | e6pxvD1 | A: few secondary structure elements | X: Insulin-like (From Topology) | H: Insulin-like (From Topology) | T: Insulin-like | F: Insulin | ECOD (1.6) |
| D [auth E] | Insulin | e6pxvE1 | A: few secondary structure elements | X: Insulin-like (From Topology) | H: Insulin-like (From Topology) | T: Insulin-like | F: Insulin | ECOD (1.6) |
| E [auth F] | Insulin | e6pxvF1 | A: few secondary structure elements | X: Insulin-like (From Topology) | H: Insulin-like (From Topology) | T: Insulin-like | F: Insulin | ECOD (1.6) |
| F [auth G] | Insulin | e6pxvG1 | A: few secondary structure elements | X: Insulin-like (From Topology) | H: Insulin-like (From Topology) | T: Insulin-like | F: Insulin | ECOD (1.6) |
Domain Annotation: CATH CATH Database Homepage
| Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
|---|---|---|---|---|---|---|
| A | 3.80.20.20 | Alpha Beta | Alpha-Beta Horseshoe | 24 nucleotide stem-loop, u2 snrnp hairpin iv. U2 a' | Chain A | CATH (utative) |
| A | 2.10.220.10 | Mainly Beta | Ribbon | Hormone Receptor, Insulin-like Growth Factor Receptor 1 | Chain A domain 2 | CATH (utative) |
| B [auth C] | 3.80.20.20 | Alpha Beta | Alpha-Beta Horseshoe | 24 nucleotide stem-loop, u2 snrnp hairpin iv. U2 a' | Chain A | CATH (utative) |
| B [auth C] | 2.10.220.10 | Mainly Beta | Ribbon | Hormone Receptor, Insulin-like Growth Factor Receptor 1 | Chain A domain 2 | CATH (utative) |
| C [auth D] | 1.10.100.10 | Mainly Alpha | Orthogonal Bundle | Insulin-like, subunit E | Insulin-like | CATH (utative) |
| D [auth E] | 1.10.100.10 | Mainly Alpha | Orthogonal Bundle | Insulin-like, subunit E | Insulin-like | CATH (utative) |
| E [auth F] | 1.10.100.10 | Mainly Alpha | Orthogonal Bundle | Insulin-like, subunit E | Insulin-like | CATH (utative) |
| F [auth G] | 1.10.100.10 | Mainly Alpha | Orthogonal Bundle | Insulin-like, subunit E | Insulin-like | CATH (utative) |
Protein Family Annotation Pfam Database Homepage
| Chains | Accession | Name | Description | Comments | Source |
|---|---|---|---|---|---|
| A, B [auth C] | PF00757 | Furin-like cysteine rich region (Furin-like) | Furin-like cysteine rich region | Domain | |
| A, B [auth C] | PF17870 | Insulin receptor trans-membrane segment (Insulin_TMD) | Insulin receptor trans-membrane segment | This entry represents the trans-membrane domain (TMD) found in insulin receptor proteins. The TMD of the insulin receptor is within the beta-subunit and contains 23 amino acids. Mutations in the TMD were shown to have effects on receptor biosynthetic ... | Domain |
| A, B [auth C] | PF00041 | Fibronectin type III domain (fn3) | Fibronectin type III domain | Domain | |
| A, B [auth C] | PF01030 | Receptor L domain (Recep_L_domain) | Receptor L domain | - | Repeat |
| C [auth D], D [auth E], E [auth F], F [auth G] | PF00049 | Insulin/IGF/Relaxin family (Insulin) | Insulin/IGF/Relaxin family | Superfamily includes insulins; relaxins; insulin-like growth factor; and bombyxin. All are secreted regulatory hormones. Disulfide rich, all-alpha fold. Alignment includes B chain, linker (which is processed out of the final product), and A chain. | Domain |














