6B3S | pdb_00006b3s

Crystal structure of the Fab fragment of necitumumab (Fab11F8) in complex with domain III from a cetuximab resistant variant of EGFR (sEGFRd3-S468R)


Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
L [auth K]d6b3sk1 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin automated matches automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
I [auth G]d6b3sg1 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin automated matches automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
F [auth D]d6b3sd1 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin automated matches automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
C [auth L]d6b3sl1 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin automated matches automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
J [auth I]d6b3si1 Alpha and beta proteins (a/b) Leucine-rich repeat, LRR (right-handed beta-alpha superhelix) L domain-like L domain automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
J [auth I]d6b3si2 Small proteins Knottins (small inhibitors, toxins, lectins) Growth factor receptor domain automated matches automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
J [auth I]d6b3si3 Artifacts Tags Tags Tags N-terminal Tags Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
G [auth E]d6b3se1 Alpha and beta proteins (a/b) Leucine-rich repeat, LRR (right-handed beta-alpha superhelix) L domain-like L domain automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
G [auth E]d6b3se2 Small proteins Knottins (small inhibitors, toxins, lectins) Growth factor receptor domain automated matches automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
G [auth E]d6b3se3 Artifacts Tags Tags Tags N-terminal Tags Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
D [auth B]d6b3sb1 Alpha and beta proteins (a/b) Leucine-rich repeat, LRR (right-handed beta-alpha superhelix) L domain-like L domain automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
D [auth B]d6b3sb2 Small proteins Knottins (small inhibitors, toxins, lectins) Growth factor receptor domain automated matches automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
D [auth B]d6b3sb3 Artifacts Tags Tags Tags N-terminal Tags Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Ad6b3sa1 Alpha and beta proteins (a/b) Leucine-rich repeat, LRR (right-handed beta-alpha superhelix) L domain-like L domain automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Ad6b3sa2 Artifacts Tags Tags Tags N-terminal Tags Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
J [auth I]SCOP2B SuperfamilyGrowth factor receptor domain-like 8038763 3000398 SCOP2B (2022-06-29)
J [auth I]SCOP2B SuperfamilyL domain-like 8038760 3001010 SCOP2B (2022-06-29)
G [auth E]SCOP2B SuperfamilyGrowth factor receptor domain-like 8038763 3000398 SCOP2B (2022-06-29)
G [auth E]SCOP2B SuperfamilyL domain-like 8038760 3001010 SCOP2B (2022-06-29)
D [auth B]SCOP2B SuperfamilyL domain-like 8038760 3001010 SCOP2B (2022-06-29)
D [auth B]SCOP2B SuperfamilyGrowth factor receptor domain-like 8038763 3000398 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyL domain-like 8038760 3001010 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyGrowth factor receptor domain-like 8038763 3000398 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
L [auth K]ATP-synt_Epse6b3sK1 A: a/b three-layered sandwichesX: Periplasmic binding protein-like IIH: Rubredoxin-relatedT: Tetrapyrrole methylase C-terminal domainF: ATP-synt_EpsECOD (v294.1)
I [auth G]ATP-synt_Epse6b3sG1 A: a/b three-layered sandwichesX: Periplasmic binding protein-like IIH: Rubredoxin-relatedT: Tetrapyrrole methylase C-terminal domainF: ATP-synt_EpsECOD (v294.1)
F [auth D]ATP-synt_Epse6b3sD1 A: a/b three-layered sandwichesX: Periplasmic binding protein-like IIH: Rubredoxin-relatedT: Tetrapyrrole methylase C-terminal domainF: ATP-synt_EpsECOD (v294.1)
C [auth L]RuBisCO_large_Ne6b3sL1 A: a/b three-layered sandwichesX: Protein kinase/SAICAR synthase/ATP-graspH: Protein kinase/SAICAR synthase/ATP-graspT: Undecaprenyl diphosphate synthaseF: RuBisCO_large_NECOD (v294.1)
K [auth J]ATP-synt_Epse6b3sJ1 A: a/b three-layered sandwichesX: Periplasmic binding protein-like IIH: Rubredoxin-relatedT: Tetrapyrrole methylase C-terminal domainF: ATP-synt_EpsECOD (v294.1)
H [auth F]ATP-synt_Epse6b3sF1 A: a/b three-layered sandwichesX: Periplasmic binding protein-like IIH: Rubredoxin-relatedT: Tetrapyrrole methylase C-terminal domainF: ATP-synt_EpsECOD (v294.1)
E [auth C]ATP-synt_Epse6b3sC1 A: a/b three-layered sandwichesX: Periplasmic binding protein-like IIH: Rubredoxin-relatedT: Tetrapyrrole methylase C-terminal domainF: ATP-synt_EpsECOD (v294.1)
B [auth H]RuBisCO_large_Ne6b3sH1 A: a/b three-layered sandwichesX: Protein kinase/SAICAR synthase/ATP-graspH: Protein kinase/SAICAR synthase/ATP-graspT: Undecaprenyl diphosphate synthaseF: RuBisCO_large_NECOD (v294.1)
J [auth I]ATP-synt_Epse6b3sI1 A: a/b three-layered sandwichesX: Periplasmic binding protein-like IIH: Rubredoxin-relatedT: Tetrapyrrole methylase C-terminal domainF: ATP-synt_EpsECOD (v294.1)
G [auth E]ATP-synt_Epse6b3sE1 A: a/b three-layered sandwichesX: Periplasmic binding protein-like IIH: Rubredoxin-relatedT: Tetrapyrrole methylase C-terminal domainF: ATP-synt_EpsECOD (v294.1)
D [auth B]RuBisCO_large_Ne6b3sB1 A: a/b three-layered sandwichesX: Protein kinase/SAICAR synthase/ATP-graspH: Protein kinase/SAICAR synthase/ATP-graspT: Undecaprenyl diphosphate synthaseF: RuBisCO_large_NECOD (v294.1)
AATP-synt_Epse6b3sA1 A: a/b three-layered sandwichesX: Periplasmic binding protein-like IIH: Rubredoxin-relatedT: Tetrapyrrole methylase C-terminal domainF: ATP-synt_EpsECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

IMGT Antibody Annotation IMGT Database Homepage

ChainProtein NameDescriptionOrganism NameGene Allele Name(s)Domain Name(s)Receptor TypeReceptor DescriptionProvenance Source
C [auth L],
F [auth D],
I [auth G],
L [auth K]
Necitumumab Fab L-KAPPA Homo sapiens (human) IGKV3D-11*02, IGKJ4*01, IGKJ4*02, IGKC*01 V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA IG FAB-GAMMA-1_KAPPA IMGT (202611-0)
B [auth H],
E [auth C],
H [auth F],
K [auth J]
Necitumumab Fab VH-CH1 Homo sapiens (human) IGHV4-30-4*01, IGHJ4*01, IGHJ4*02, IGHJ4*03, IGHG1*01, IGHG1*02, IGHG1*04, IGHG1*05 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-1_KAPPA IMGT (202611-0)
A,
D [auth B],
G [auth E],
J [auth I]
Epidermal Growth Factor Receptor (EGFR) EGFR1 Homo sapiens (human) EGFR*01 R-LIKE-DOMAIN EGFR (Pr28-459) RPI EGFR1 IMGT (202611-0)

SAbDab Antibody Annotation SAbDab Database Homepage

ChainChain ClassChain SubclassChain TypeAntigen Name(s) Provenance Source
C [auth L],
F [auth D],
I [auth G],
L [auth K]
Light ChainIGKV3 Kappaepidermal growth factor receptorSAbDab (2026-03-27)
B [auth H],
E [auth C],
H [auth F],
K [auth J]
Heavy ChainIGHV4 -epidermal growth factor receptorSAbDab (2026-03-27)

Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage

ChainNameTargetProvenance Source
C [auth L],
F [auth D],
I [auth G],
L [auth K]
Necitumumab EGFR/ERBB1/HER1Therapeutic SAbDab (2026-03-27)
B [auth H],
E [auth C],
H [auth F],
K [auth J]
Necitumumab EGFR/ERBB1/HER1Therapeutic SAbDab (2026-03-27)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A,
D [auth B],
G [auth E],
J [auth I]
PF01030Receptor L domain (Recep_L_domain)Receptor L domain- Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
C [auth L],
F [auth D],
I [auth G],
L [auth K]
Necitumumab Fab Light chain---
B [auth H],
E [auth C],
H [auth F],
K [auth J]
Necitumumab Fab Heavy chain---
A,
D [auth B],
G [auth E],
J [auth I]
Epidermal growth factor receptor

Pharos: Disease Associations Pharos Homepage Annotation

ChainsDrug Target  Associated Disease
A,
D [auth B],
G [auth E],
J [auth I]
PharosP00533