5TQQ | pdb_00005tqq

Cryo-electron microscopy structure of a bovine CLC-K chloride channel, main (class 1) conformation

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD
Membrane Protein Annotation: mpstruc

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
F [auth I]	Lig_chan-Glu_bd	e5tqqI1	A: a/b three-layered sandwiches	X: F-type ATP synthase subunit b	H: Bacterial cell wall synthesis membrane enzyme MraY-related	T: Bacterial cell wall synthesis membrane enzyme MraY-related	F: Lig_chan-Glu_bd	ECOD (v294.1)
C [auth H]	Lig_chan-Glu_bd	e5tqqH1	A: a/b three-layered sandwiches	X: F-type ATP synthase subunit b	H: Bacterial cell wall synthesis membrane enzyme MraY-related	T: Bacterial cell wall synthesis membrane enzyme MraY-related	F: Lig_chan-Glu_bd	ECOD (v294.1)
E [auth M]	Lig_chan-Glu_bd	e5tqqM1	A: a/b three-layered sandwiches	X: F-type ATP synthase subunit b	H: Bacterial cell wall synthesis membrane enzyme MraY-related	T: Bacterial cell wall synthesis membrane enzyme MraY-related	F: Lig_chan-Glu_bd	ECOD (v294.1)
B [auth L]	Lig_chan-Glu_bd	e5tqqL1	A: a/b three-layered sandwiches	X: F-type ATP synthase subunit b	H: Bacterial cell wall synthesis membrane enzyme MraY-related	T: Bacterial cell wall synthesis membrane enzyme MraY-related	F: Lig_chan-Glu_bd	ECOD (v294.1)
D [auth B]	V-set	e5tqqB1	A: a/b three-layered sandwiches	X: Small envelope protein M	H: Small envelope protein M	T: Small envelope protein M	F: V-set	ECOD (v294.1)
A	Lig_chan-Glu_bd	e5tqqA1	A: a/b three-layered sandwiches	X: F-type ATP synthase subunit b	H: Bacterial cell wall synthesis membrane enzyme MraY-related	T: Bacterial cell wall synthesis membrane enzyme MraY-related	F: Lig_chan-Glu_bd	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
E [auth M]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
D [auth B]	3.10.580.10	Alpha Beta	Roll	CBS-domain	CBS-domain	CATH (4.3.0)
A	3.10.580.10	Alpha Beta	Roll	CBS-domain	CBS-domain	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
C [auth H], F [auth I]	Antibody Fab Fragment	VH	Mus musculus (house mouse)	IGHV3-202, IGHJ401	V-DOMAIN VH	IG	FV-HEAVY_KAPPA	IMGT (202611-0)
B [auth L], E [auth M]	Antibody Fab Fragment	V-KAPPA	Mus musculus (house mouse)	IGKV6-1501, IGKJ501	V-DOMAIN V-KAPPA	IG	FV-HEAVY_KAPPA	IMGT (202611-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth H], F [auth I]	Heavy Chain	IGHV3	-	chloride channel protein	SAbDab (2026-03-27)
B [auth L], E [auth M]	Light Chain	IGKV6	Kappa	chloride channel protein	SAbDab (2026-03-27)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, D [auth B]	PF00654	Voltage gated chloride channel (Voltage_CLC)	Voltage gated chloride channel	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth H], F [auth I]	Monoclonal antibody, Fab fragment, heavy chain	-	-	-
B [auth L], E [auth M]	Monoclonal antibody, Fab fragment, light chain	-	-	-
A, D [auth B]	Chloride channel protein	voltage-gated chloride channel activity monoatomic anion transmembrane transporter activity chloride transmembrane transporter activity gated channel activity monoatomic ion channel activity voltage-gated channel activity voltage-gated monoatomic ion channel activity voltage-gated monoatomic anion channel activity passive transmembrane transporter activity channel activity monoatomic anion channel activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity voltage-gated chloride channel activity monoatomic anion transmembrane transporter activity chloride transmembrane transporter activity gated channel activity monoatomic ion channel activity voltage-gated channel activity voltage-gated monoatomic ion channel activity voltage-gated monoatomic anion channel activity passive transmembrane transporter activity channel activity monoatomic anion channel activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity chloride channel activity cation binding ion binding binding metal ion binding small molecule binding	localization transport monoatomic anion transport monoatomic ion transport chloride transport establishment of localization inorganic anion transport	protein-containing complex cellular anatomical structure transmembrane transporter complex membrane chloride channel complex membrane protein complex transporter complex monoatomic ion channel complex cell periphery plasma membrane basal part of cell basal plasma membrane plasma membrane region basolateral plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, D [auth B]	IPR001807	Chloride channel	Family
A, D [auth B]	IPR046342	CBS domain superfamily	Homologous Superfamily
A, D [auth B]	IPR014743	Chloride channel, core	Homologous Superfamily
A, D [auth B]	IPR002250	Chloride channel ClC-K	Family
A, D [auth B]	IPR050970	Voltage-gated chloride channel	Family

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, D [auth B]	OPM	Transmembrane	Alpha-helical polytopic	Chloride transporter (ClC)	Chloride transporter

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, D [auth B]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, D [auth B]	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, D [auth B]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Channels: Other Ion Channels	CLC-K chloride ion channel, class 1

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.

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