4NKI | pdb_00004nki

Crystal structure of a Fab


Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
B [auth L]Cys_Met_Meta_PPe4nkiL1 A: alpha bundlesX: Cytidine deaminase-likeH: Cytidine deaminase-likeT: Cytidine deaminase-likeF: Cys_Met_Meta_PPECOD (develop294)
A [auth H]Cys_Met_Meta_PPe4nkiH1 A: alpha bundlesX: Cytidine deaminase-likeH: Cytidine deaminase-likeT: Cytidine deaminase-likeF: Cys_Met_Meta_PPECOD (develop294)

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]Fab L-LAMBDA Homo sapiens (human) IGLV2-14*01, IGLJ1*01, IGLC1*02 V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA IG FAB-GAMMA-1_LAMBDA IMGT (202610-0)
A [auth H]Fab VH-CH1 Homo sapiens (human) IGHV3-23*01, IGHV3-23D*01, IGHJ4*01, IGHJ4*02, IGHJ4*03, IGHG1*03 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-1_LAMBDA IMGT (202610-0)

SAbDab Antibody Annotation SAbDab Database Homepage

ChainChain ClassChain SubclassChain TypeAntigen Name(s) Provenance Source
B [auth L]Light ChainIGLV2 Lambda-SAbDab (2026-03-20)
A [auth H]Heavy ChainIGHV3 --SAbDab (2026-03-20)

Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage

ChainNameTargetProvenance Source
B [auth L] Avelumab PDL1/CD274Therapeutic SAbDab (2026-03-20)
A [auth H] Avelumab PDL1/CD274Therapeutic SAbDab (2026-03-20)