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Crystal structure of human Fab PGT121, 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) B [auth A] Pyr_redox_2 e4jy4A1 A: alpha arrays X: SSHS domain H: Class II aaRS and biotin synthetases T: NADH-quinone oxidoreductase subunit 8 (Nqo8)-related F: Pyr_redox_2 ECOD (v295.2) A [auth B] Pyr_redox_2 e4jy4B1 A: alpha arrays X: SSHS domain H: Class II aaRS and biotin synthetases T: NADH-quinone oxidoreductase subunit 8 (Nqo8)-related F: Pyr_redox_2 ECOD (v295.2)
Chain Protein Name Description Organism Name Gene Allele Name(s) Domain Name(s) Receptor Type Receptor Description Provenance Source B [auth A] PGT121 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) A [auth B] PGT121 mAb, anti-gp120 [HIV-1], broadly neutralizing VH-CH1 Homo sapiens (human) IGHV4-59*01, IGHV4-59*08, IGHV4-4*08, IGHJ6*03, IGHG1*03 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-1_LAMBDA IMGT (202637-0)
Chain Chain Class Chain Subclass Chain Type Antigen Name(s) Provenance Source A [auth B] Heavy Chain IGHV4 - - SAbDab (2026-09-25)