5CEX | pdb_00005cex

Crystal Structure of Fab 32H+109L, a putative precursor of the PGT121 family of potent HIV-1 antibodies

External Resource: Annotation


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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Dd5cexd1 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin automated matches automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Dd5cexd2 Artifacts Tags Tags Tags N-terminal Tags (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Bd5cexb1 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin automated matches automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Bd5cexb2 Artifacts Tags Tags Tags N-terminal Tags (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Ad5cexa2 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin C1 set domains (antibody constant domain-like) automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Ad5cexa1 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin automated matches automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Cd5cexc2 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin C1 set domains (antibody constant domain-like) automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Cd5cexc1 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin automated matches automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
DPI3_PI4_kinasee5cexD1 A: a/b three-layered sandwichesX: Restriction endonuclease-likeH: Restriction endonuclease-likeT: Restriction endonuclease-likeF: PI3_PI4_kinaseECOD (v294.1)
DNTP_transferasee5cexD2 A: a/b three-layered sandwichesX: Lipocalins/StreptavidinH: SAM/DNA-glycosylaseT: SAM domain-likeF: NTP_transferaseECOD (v294.1)
BPI3_PI4_kinasee5cexB1 A: a/b three-layered sandwichesX: Restriction endonuclease-likeH: Restriction endonuclease-likeT: Restriction endonuclease-likeF: PI3_PI4_kinaseECOD (v294.1)
BNTP_transferasee5cexB2 A: a/b three-layered sandwichesX: Lipocalins/StreptavidinH: SAM/DNA-glycosylaseT: SAM domain-likeF: NTP_transferaseECOD (v294.1)
API3_PI4_kinasee5cexA1 A: a/b three-layered sandwichesX: Restriction endonuclease-likeH: Restriction endonuclease-likeT: Restriction endonuclease-likeF: PI3_PI4_kinaseECOD (v294.1)
CPI3_PI4_kinasee5cexC1 A: a/b three-layered sandwichesX: Restriction endonuclease-likeH: Restriction endonuclease-likeT: Restriction endonuclease-likeF: PI3_PI4_kinaseECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
D2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
B2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
A2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
C2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

ChainProtein NameDescriptionOrganism NameGene Allele Name(s)Domain Name(s)Receptor TypeReceptor DescriptionProvenance Source
B, D
9H+3L Fab VH-CH1 Homo sapiens (human) IGHV4-59*01, IGHV4-59*08, IGHV4-4*08, IGHJ6*03, IGHG1*01, IGHG1*02, IGHG1*04, IGHG1*05 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-1_LAMBDA IMGT (202611-0)
A, C
9H+3L Fab 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 (202611-0)

SAbDab Antibody Annotation SAbDab Database Homepage

ChainChain ClassChain SubclassChain TypeAntigen Name(s) Provenance Source
B, D
Heavy ChainIGHV4 --SAbDab (2026-03-27)
A, C
Light ChainIGLV3 Lambda-SAbDab (2026-03-27)