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 3ZL4 | pdb_00003zl4

Antibody structural organization: Role of kappa - lambda chain constant domain switch in catalytic functionality

External Resource: Annotation


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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
B [auth L]d3zl4l2 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin C1 set domains (antibody constant domain-like) automated matches HUMAN (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
B [auth L]d3zl4l1 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin automated matches automated matches HUMAN (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
B [auth L]Acylphosphatasee3zl4L1 A: alpha arraysX: FAD-linked reductases, C-terminal domain-likeH: FAD-linked reductases-CT: FAD-linked reductases-CF: AcylphosphataseECOD (v295.2)
A [auth H]Acylphosphatasee3zl4H1 A: alpha arraysX: FAD-linked reductases, C-terminal domain-likeH: FAD-linked reductases-CT: FAD-linked reductases-CF: AcylphosphataseECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
B [auth L]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
A [auth H]2.60.40.10 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 [auth L]A17 Fab L-LAMBDA Homo sapiens (human) IGLV1-51*01, IGLJ2*01, IGLJ3*02, IGLJ3*01, IGLC2*01, IGLC2*02, IGLC3*04 V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA IG FAB-GAMMA-1_LAMBDA IMGT (202637-0)
A [auth H]A17 Fab VH-CH1 Homo sapiens (human) IGHV4-38-2*01, IGHJ1*01, IGHJ5*01, IGHG1*01, IGHG1*02, IGHG1*04, IGHG1*05 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-1_LAMBDA IMGT (202637-0)

SAbDab Antibody Annotation SAbDab Database Homepage

ChainChain ClassChain SubclassChain TypeAntigen Name(s) Provenance Source
B [auth L]Light ChainIGLV1 Lambda-SAbDab (2026-09-25)
A [auth H]Heavy ChainIGHV4 --SAbDab (2026-09-25)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
B [auth L]A17 ANTIBODY FAB FRAGMENT LAMBDA LIGHT CHAIN- -
A [auth H]A17 ANTIBODY FAB FRAGMENT HEAVY CHAIN- -

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
B [auth L]IPR003597Immunoglobulin C1-setDomain
B [auth L]IPR050150Immunoglobulin Variable Light ChainFamily
B [auth L]IPR013783Immunoglobulin-like foldHomologous Superfamily
B [auth L]IPR036179Immunoglobulin-like domain superfamilyHomologous Superfamily
B [auth L]IPR013106Immunoglobulin V-set domainDomain
B [auth L]IPR003599Immunoglobulin domain subtypeDomain
B [auth L]IPR007110Immunoglobulin-like domainDomain
B [auth L]IPR003006Immunoglobulin/major histocompatibility complex, conserved siteConserved Site
A [auth H]IPR003597Immunoglobulin C1-setDomain
A [auth H]IPR013783Immunoglobulin-like foldHomologous Superfamily
A [auth H]IPR036179Immunoglobulin-like domain superfamilyHomologous Superfamily
A [auth H]IPR013106Immunoglobulin V-set domainDomain
A [auth H]IPR003599Immunoglobulin domain subtypeDomain
A [auth H]IPR007110Immunoglobulin-like domainDomain
A [auth H]IPR050380Immune Recognition and Response ModulatorsFamily
A [auth H]IPR003006Immunoglobulin/major histocompatibility complex, conserved siteConserved Site