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Crystal structure of human Fab PGT123, a broadly reactive and potent HIV-1 neutralizing antibody External Resource: Annotation Chains Family Name Domain Identifier Architecture Possible Homology Homology Topology Family Provenance Source (Version) D Cytochrom_C550 e4jy6D1 A: alpha arrays X: Cytochrome c-like H: Cytochrome c T: Cytochrome c F: Cytochrom_C550 ECOD (v295.2) B PGM_PMM_IV e4jy6B1 A: alpha arrays X: Major vault protein (MVP) structural repeat domain H: Major vault protein (MVP) structural repeat domain T: Major vault protein (MVP) structural repeat domain F: PGM_PMM_IV ECOD (v295.2) C Ig_2 e4jy6C3 A: alpha arrays X: Subtilisin-like H: Subtilisin-like T: Subtilisin-like F: Ig_2 ECOD (v295.2) A Ig_2 e4jy6A3 A: alpha arrays X: Subtilisin-like H: Subtilisin-like T: Subtilisin-like F: Ig_2 ECOD (v295.2)
Chain Protein Name Description Organism Name Gene Allele Name(s) Domain Name(s) Receptor Type Receptor Description Provenance Source PGT123 mAb, anti-gp120 [HIV-1], broadly neutralizing VH-CH1 Homo sapiens (human) IGHV4-59*01, IGHV4-59*08, IGHJ3*01, IGHG1*03 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-1_LAMBDA IMGT (202637-0) PGT123 mAb, anti-gp120 [HIV-1], broadly neutralizing L-LAMBDA Homo sapiens (human) IGLV3-21*01, IGLJ3*02, IGLC3*03 V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA IG FAB-GAMMA-1_LAMBDA IMGT (202637-0)
Chain Chain Class Chain Subclass Chain Type Antigen Name(s) Provenance Source Heavy Chain IGHV4 - - SAbDab (2026-09-25)