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X-RAY STRUCTURES OF THE ANTIGEN-BINDING DOMAINS FROM THREE VARIANTS OF HUMANIZED ANTI-P185-HER2 ANTIBODY 4D5 AND COMPARISON WITH MOLECULAR MODELING External Resource: Annotation Chains Family Name Domain Identifier Architecture Possible Homology Homology Topology Family Provenance Source (Version) D Copper-bind e1fvcD1 A: alpha arrays X: Phage tail fiber protein trimerization domain H: Phage tail fiber protein trimerization domain T: Phage tail fiber protein trimerization domain F: Copper-bind ECOD (v295.2) B Copper-bind e1fvcB1 A: alpha arrays X: Phage tail fiber protein trimerization domain H: Phage tail fiber protein trimerization domain T: Phage tail fiber protein trimerization domain F: Copper-bind ECOD (v295.2) C Copper-bind e1fvcC1 A: alpha arrays X: Phage tail fiber protein trimerization domain H: Phage tail fiber protein trimerization domain T: Phage tail fiber protein trimerization domain F: Copper-bind ECOD (v295.2) A Copper-bind e1fvcA1 A: alpha arrays X: Phage tail fiber protein trimerization domain H: Phage tail fiber protein trimerization domain T: Phage tail fiber protein trimerization domain F: Copper-bind ECOD (v295.2)
Chain Protein Name Description Organism Name Gene Allele Name(s) Domain Name(s) Receptor Type Receptor Description Provenance Source 4D5-humanized variant 8 VH Humanized (humanized) IGHV3-66*01, IGHV3-66*02, IGHV3-66*04, IGHJ4*01, IGHJ4*02, IGHJ4*03 V-DOMAIN VH IG FV-HEAVY_KAPPA IMGT (202638-0) 4D5-humanized variant 8 V-KAPPA Humanized (humanized) IGKV1-39*01, IGKV1D-39*01, IGKJ1*01 V-DOMAIN V-KAPPA IG FV-HEAVY_KAPPA IMGT (202638-0)
Chain Chain Class Chain Subclass Chain Type Antigen Name(s) Provenance Source Heavy Chain IGHV3 - - SAbDab (2026-10-02) Light Chain IGKV1 Kappa - SAbDab (2026-10-02)
Chain Name Target Provenance Source Runimotamab ERBB2/CD340/HER2, CD3E, TNFRSF9/CD137/4-1BB, SIRPA Therapeutic SAbDab (2026-10-02) Vislarafusp SIRPA, ERBB2/CD340/HER2, TNFRSF9/CD137/4-1BB, CD3E Therapeutic SAbDab (2026-10-02)