3EFD | pdb_00003efd

The crystal structure of the cytoplasmic domain of KcsA


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

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
C [auth K]Peptidase_C14e3efdK01 A: a/b three-layered sandwichesX: Caspase-likeH: Caspase-likeT: Caspase-likeF: Peptidase_C14ECOD (v294.1)
B [auth H]Phospholip_A2_1e3efdH1 A: a/b three-layered sandwichesX: TAZ domainH: TAZ domainT: LipocalinsF: Phospholip_A2_1ECOD (v294.1)
A [auth L]RdRP_3e3efdL1 A: a/b three-layered sandwichesX: HTHH: NudixT: NudixF: RdRP_3ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
B [auth H]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
A [auth L]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 H]FAB-GAMMA-1_KAPPA VH-CH1 Homo sapiens (human) IGHV3-66*01, IGHV3-66*02, IGHV3-66*04, IGHV3-23*04, IGHJ6*01, IGHJ6*02, IGHG1*01, IGHG1*02, IGHG1*04 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-1_KAPPA IMGT (202611-0)
A [auth L]FAB-GAMMA-1_KAPPA L-KAPPA Homo sapiens (human) IGKV1-39*01, IGKV1D-39*01, IGKJ1*01, IGKC*01 V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA IG FAB-GAMMA-1_KAPPA IMGT (202611-0)

SAbDab Antibody Annotation SAbDab Database Homepage

ChainChain ClassChain SubclassChain TypeAntigen Name(s) Provenance Source
B [auth H]Heavy ChainIGHV3 -kcsaSAbDab (2026-03-27)
A [auth L]Light ChainIGKV1 KappakcsaSAbDab (2026-03-27)