7XQB

Structure of connexin43/Cx43/GJA1 gap junction intercellular channel in POPE/CHS nanodiscs at pH ~8.0

External Resource: Annotation

Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Connexin	e7xqbA1	A: alpha bundles	X: Connexin 26 (From Topology)	H: Connexin 26 (From Topology)	T: Connexin 26	F: Connexin	ECOD (1.6)
B [auth G]	Connexin	e7xqbG1	A: alpha bundles	X: Connexin 26 (From Topology)	H: Connexin 26 (From Topology)	T: Connexin 26	F: Connexin	ECOD (1.6)
C [auth B]	Connexin	e7xqbB1	A: alpha bundles	X: Connexin 26 (From Topology)	H: Connexin 26 (From Topology)	T: Connexin 26	F: Connexin	ECOD (1.6)
D [auth C]	Connexin	e7xqbC1	A: alpha bundles	X: Connexin 26 (From Topology)	H: Connexin 26 (From Topology)	T: Connexin 26	F: Connexin	ECOD (1.6)
E [auth D]	Connexin	e7xqbD1	A: alpha bundles	X: Connexin 26 (From Topology)	H: Connexin 26 (From Topology)	T: Connexin 26	F: Connexin	ECOD (1.6)
F [auth E]	Connexin	e7xqbE1	A: alpha bundles	X: Connexin 26 (From Topology)	H: Connexin 26 (From Topology)	T: Connexin 26	F: Connexin	ECOD (1.6)
G [auth F]	Connexin	e7xqbF1	A: alpha bundles	X: Connexin 26 (From Topology)	H: Connexin 26 (From Topology)	T: Connexin 26	F: Connexin	ECOD (1.6)
H	Connexin	e7xqbH1	A: alpha bundles	X: Connexin 26 (From Topology)	H: Connexin 26 (From Topology)	T: Connexin 26	F: Connexin	ECOD (1.6)
I	Connexin	e7xqbI1	A: alpha bundles	X: Connexin 26 (From Topology)	H: Connexin 26 (From Topology)	T: Connexin 26	F: Connexin	ECOD (1.6)
J	Connexin	e7xqbJ1	A: alpha bundles	X: Connexin 26 (From Topology)	H: Connexin 26 (From Topology)	T: Connexin 26	F: Connexin	ECOD (1.6)
K	Connexin	e7xqbK1	A: alpha bundles	X: Connexin 26 (From Topology)	H: Connexin 26 (From Topology)	T: Connexin 26	F: Connexin	ECOD (1.6)
L	Connexin	e7xqbL1	A: alpha bundles	X: Connexin 26 (From Topology)	H: Connexin 26 (From Topology)	T: Connexin 26	F: Connexin	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B [auth G], C [auth B], D [auth C], E [auth D], A, B [auth G], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H, I, J, K, L	PF00029	Connexin (Connexin)	Connexin	Connexin proteins form gap-junctions between cells. They carry four transmembrane regions, hence why this family now includes Connexin_CCC, which represented the second pair of TMs.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B [auth G], C [auth B], D [auth C], E [auth D], A, B [auth G], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H, I, J, K, L	Gap junction alpha-1 protein	cytoskeletal protein binding protein binding binding tubulin binding alpha-tubulin binding protein tyrosine kinase binding kinase binding enzyme binding protein kinase binding signaling receptor binding wide pore channel activity gap junction channel activity involved in cardiac conduction electrical coupling passive transmembrane transporter activity channel activity cytoskeletal protein binding protein binding binding tubulin binding alpha-tubulin binding protein tyrosine kinase binding kinase binding enzyme binding protein kinase binding signaling receptor binding wide pore channel activity gap junction channel activity involved in cardiac conduction electrical coupling passive transmembrane transporter activity channel activity transporter activity gap junction channel activity involved in cell communication by electrical coupling gap junction channel activity transmembrane transporter activity scaffold protein binding beta-catenin binding glutathione transmembrane transporter activity tripeptide transmembrane transporter activity sulfur compound transmembrane transporter activity oligopeptide transmembrane transporter activity amide transmembrane transporter activity modified amino acid transmembrane transporter activity organic anion transmembrane transporter activity monoatomic ion transmembrane transporter activity gap junction hemi-channel activity beta-tubulin binding efflux transmembrane transporter activity	developmental process heart development multicellular organism development multicellular organismal process anatomical structure development animal organ development circulatory system development system development protein localization localization cellular localization cellular macromolecule localization macromolecule localization cellular process developmental process heart development multicellular organism development multicellular organismal process anatomical structure development animal organ development circulatory system development system development protein localization localization cellular localization cellular macromolecule localization macromolecule localization cellular process transport microtubule-based transport establishment of localization sensory organ development eye development visual system development camera-type eye development sensory system development lens development in camera-type eye xenobiotic transport transmembrane transport export from cell export across plasma membrane cardiac muscle cell membrane repolarization regulation of biological process membrane repolarization regulation of membrane repolarization ventricular cardiac muscle cell membrane repolarization biological regulation regulation of cardiac muscle cell membrane repolarization regulation of biological quality regulation of ventricular cardiac muscle cell membrane repolarization regulation of membrane potential regulation of multicellular organismal development regulation of developmental process bone mineralization regulation of biomineral tissue development regulation of bone mineralization tissue development ossification biomineral tissue development regulation of multicellular organismal process regulation of ossification epithelium development cellular developmental process cell development developmental maturation epithelial cell differentiation epithelial cell development columnar/cuboidal epithelial cell development anatomical structure maturation cell differentiation epithelial cell maturation cell maturation columnar/cuboidal epithelial cell differentiation columnar/cuboidal epithelial cell maturation establishment of organelle localization microtubule cytoskeleton organization spindle localization establishment or maintenance of cell polarity mitotic cell cycle cellular component organization establishment of mitotic spindle localization establishment of spindle localization establishment of spindle orientation organelle localization establishment of localization in cell cell cycle cellular component organization or biogenesis microtubule cytoskeleton organization involved in mitosis cell cycle process establishment of cell polarity organelle organization mitotic cell cycle process establishment of mitotic spindle orientation microtubule-based process cytoskeleton organization cellular component biogenesis cell junction organization cellular component assembly cell junction assembly gap junction assembly cell-cell junction assembly cell-cell junction organization cell communication by electrical coupling cell communication cell communication by chemical coupling blood vessel morphogenesis tube development vasculature development anatomical structure morphogenesis tube morphogenesis blood vessel development cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction positive regulation of canonical NF-kappaB signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction intracellular signal transduction positive regulation of response to stimulus regulation of intracellular signal transduction intracellular signaling cassette signal transduction positive regulation of cellular process regulation of signaling positive regulation of intracellular signal transduction canonical NF-kappaB signal transduction regulation of response to stimulus regulation of cell communication regulation of canonical NF-kappaB signal transduction positive regulation of signaling heart process system process regulation of heart contraction regulation of system process cell communication by electrical coupling involved in cardiac conduction circulatory system process regulation of blood circulation cardiac conduction cell communication involved in cardiac conduction heart contraction blood circulation organic anion transport nitrogen compound transport carboxylic acid transport secretion organic acid transport amino acid transport acidic amino acid transport secretion by cell dicarboxylic acid transport glutamate secretion mesodermal cell differentiation mesoderm morphogenesis regulation of cell differentiation embryo development positive regulation of developmental process regulation of mesodermal cell differentiation positive regulation of cell differentiation mesoderm formation positive regulation of mesodermal cell differentiation mesoderm development formation of primary germ layer embryonic morphogenesis gastrulation tissue morphogenesis anatomical structure formation involved in morphogenesis tissue regeneration skeletal muscle tissue regeneration developmental growth growth regeneration maintenance of blood-brain barrier multicellular organismal-level homeostasis homeostatic process anatomical structure homeostasis tissue homeostasis regulation of biosynthetic process negative regulation of metabolic process negative regulation of biological process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process negative regulation of cellular process regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process regulation of metabolic process negative regulation of macromolecule metabolic process cellular response to nitrogen compound response to oxygen-containing compound response to nitrogen compound cellular response to amyloid-beta cellular response to oxygen-containing compound cellular response to chemical stimulus response to chemical response to amyloid-beta limb development appendage development embryonic limb morphogenesis embryonic appendage morphogenesis appendage morphogenesis embryonic digit morphogenesis limb morphogenesis gonad development reproductive system development reproductive process sex differentiation developmental process involved in reproduction male gonad development male sex differentiation development of primary male sexual characteristics development of primary sexual characteristics reproductive structure development spermatogenesis sexual reproduction multicellular organismal reproductive process male gamete generation gamete generation regulation of membrane depolarization membrane depolarization regulation of ventricular cardiac muscle cell membrane depolarization regulation of muscle tissue development positive regulation of striated muscle tissue development regulation of striated muscle tissue development striated muscle tissue development muscle structure development positive regulation of muscle organ development positive regulation of muscle tissue development regulation of muscle organ development positive regulation of multicellular organismal process muscle tissue development muscle organ development heart morphogenesis tissue remodeling animal organ morphogenesis atrial ventricular junction remodeling regulation of atrial cardiac muscle cell membrane depolarization positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of gene expression positive regulation of biosynthetic process positive regulation of macromolecule metabolic process skeletal system development bone development cell-cell signaling regulation of growth regulation of cellular component organization negative regulation of cell growth regulation of cell growth cell growth negative regulation of growth response to pH cellular response to pH response to abiotic stimulus cellular response to abiotic stimulus cellular response to environmental stimulus regulation of localization regulation of hormone secretion gonadotropin secretion negative regulation of signaling negative regulation of transport hormone secretion negative regulation of cell communication regulation of secretion by cell negative regulation of secretion signal release negative regulation of hormone secretion negative regulation of secretion by cell regulation of transport regulation of hormone levels regulation of gonadotropin secretion regulation of secretion endocrine hormone secretion endocrine process negative regulation of gonadotropin secretion hormone transport negative regulation of multicellular organismal process regulation of endocrine process regulation of stem cell proliferation cell population proliferation positive regulation of cell population proliferation positive regulation of stem cell proliferation stem cell proliferation regulation of cell population proliferation embryo development ending in birth or egg hatching chordate embryonic development in utero embryonic development cell activation lymphocyte activation leukocyte proliferation leukocyte activation immune system process mononuclear cell proliferation T cell activation lymphocyte proliferation T cell proliferation morphogenesis of an epithelium positive regulation of morphogenesis of an epithelium regulation of morphogenesis of an epithelium regulation of anatomical structure morphogenesis adult heart development regulation of bone remodeling bone remodeling regulation of tissue remodeling pattern specification process embryonic heart tube development embryonic heart tube morphogenesis heart looping determination of bilateral symmetry epithelial tube morphogenesis embryonic organ development determination of left/right symmetry specification of symmetry embryonic organ morphogenesis determination of heart left/right asymmetry regionalization left/right pattern formation osteoblast differentiation cardiac muscle cell action potential involved in contraction atrial cardiac muscle cell to AV node cell signaling cell-cell signaling involved in cardiac conduction cardiac muscle contraction striated muscle contraction actin filament-based process atrial cardiac muscle cell to AV node cell communication cardiac muscle cell contraction atrial cardiac muscle cell action potential action potential actin filament-based movement muscle contraction muscle system process actin-mediated cell contraction cardiac muscle cell action potential monoatomic ion transmembrane transport monoatomic ion transport regulation of vascular associated smooth muscle cell proliferation positive regulation of vascular associated smooth muscle cell proliferation regulation of smooth muscle cell proliferation smooth muscle cell proliferation positive regulation of smooth muscle cell proliferation muscle cell proliferation vascular associated smooth muscle cell proliferation regulation of body fluid levels reflex secretion by tissue mammary gland development gland development response to external stimulus body fluid secretion milk ejection reflex lactation adaptive thermogenesis regulation of cold-induced thermogenesis cold-induced thermogenesis temperature homeostasis positive regulation of cold-induced thermogenesis cardiac conduction system development cardiac muscle tissue development multi-multicellular organism process negative regulation of locomotion regulation of cell motility regulation of trophoblast cell migration regulation of reproductive process ameboidal-type cell migration regulation of cell migration cell migration cell motility female pregnancy embryo implantation negative regulation of trophoblast cell migration locomotion negative regulation of cell migration trophoblast cell migration negative regulation of reproductive process regulation of locomotion negative regulation of cell motility multi-organism reproductive process neuron migration nervous system development generation of neurons neurogenesis neuroblast migration	intracellular anatomical structure intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle contractile muscle fiber cytoplasm supramolecular fiber supramolecular polymer supramolecular complex cytosol cell-cell junction intercalated disc intracellular anatomical structure intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle contractile muscle fiber cytoplasm supramolecular fiber supramolecular polymer supramolecular complex cytosol cell-cell junction intercalated disc anchoring junction cell junction fascia adherens cell-cell contact zone membrane-bounded organelle Golgi membrane Golgi apparatus membrane intracellular membrane-bounded organelle endomembrane system bounding membrane of organelle organelle membrane protein-containing complex plasma membrane protein complex gap junction plasma membrane membrane protein complex cell periphery connexin complex focal adhesion cell-substrate junction intracellular vesicle cytoplasmic vesicle membrane vesicle membrane cytoplasmic vesicle Golgi-associated vesicle membrane Golgi-associated vesicle vesicle apical part of cell plasma membrane region apical plasma membrane membrane microdomain membrane raft organelle subcompartment endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum endoplasmic reticulum membrane lateral plasma membrane tight junction mitochondrion polymeric cytoskeletal fiber intermediate filament cytoskeleton cytoskeleton intermediate filament nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B [auth G], C [auth B], D [auth C], E [auth D], A, B [auth G], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H, I, J, K, L	IPR034634	Connexin, C-terminal	Homologous Superfamily
A, B [auth G], C [auth B], D [auth C], E [auth D], A, B [auth G], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H, I, J, K, L	IPR035091	Gap junction alpha-1 protein (Cx43), alpha helix domain superfamily	Homologous Superfamily
A, B [auth G], C [auth B], D [auth C], E [auth D], A, B [auth G], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H, I, J, K, L	IPR013124	Gap junction alpha-1 protein (Cx43), C-terminal	Domain
A, B [auth G], C [auth B], D [auth C], E [auth D], A, B [auth G], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H, I, J, K, L	IPR002261	Gap junction alpha-1 protein (Cx43)	Family
A, B [auth G], C [auth B], D [auth C], E [auth D], A, B [auth G], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H, I, J, K, L	IPR017990	Connexin, conserved site	Conserved Site
A, B [auth G], C [auth B], D [auth C], E [auth D], A, B [auth G], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H, I, J, K, L	IPR038359	Connexin, N-terminal domain superfamily	Homologous Superfamily
A, B [auth G], C [auth B], D [auth C], E [auth D], A, B [auth G], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H, I, J, K, L	IPR000500	Connexin	Family
A, B [auth G], C [auth B], D [auth C], E [auth D], A, B [auth G], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H, I, J, K, L	IPR019570	Gap junction protein, cysteine-rich domain	Domain
A, B [auth G], C [auth B], D [auth C], E [auth D], A, B [auth G], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H, I, J, K, L	IPR013092	Connexin, N-terminal	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B [auth G], C [auth B], D [auth C], E [auth D], A, B [auth G], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H, I, J, K, L	Pharos: P17302	oculodentodigital dysplasia Hallermann-Streiff syndrome hypoplastic left heart syndrome syndactyly type 3 oculodentodigital dysplasia, autosomal recessive erythrokeratodermia variabilis palmoplantar keratosis craniometaphyseal dysplasia, autosomal recessive adenoma atrioventricular septal defect 3 coronary aneurysm skin neoplasm breast carcinoma Liver Cirrhosis, Experimental papillary adenoma oculodentodigital dysplasia Hallermann-Streiff syndrome hypoplastic left heart syndrome syndactyly type 3 oculodentodigital dysplasia, autosomal recessive erythrokeratodermia variabilis palmoplantar keratosis craniometaphyseal dysplasia, autosomal recessive adenoma atrioventricular septal defect 3 coronary aneurysm skin neoplasm breast carcinoma Liver Cirrhosis, Experimental papillary adenoma prostate cancer craniometaphyseal dysplasia microcystic adenoma follicular thyroid adenoma atrioventricular septal defect skin cancer autosomal dominant palmoplantar keratoderma and congenital alopecia hypoplastic left heart syndrome 1 breast cancer cataract erythrokeratodermia variabilis et progressiva 3 hypertensive disorder Basaran Yilmaz syndrome coloboma lung cancer dermatomyositis lymphatic system disease syndactyly Duchenne muscular dystrophy myopathy osteosarcoma Becker muscular dystrophy intellectual disability large cell medulloblastoma pancreatic intraductal papillary-mucinous neoplasm congenital diaphragmatic hernia lung adenocarcinoma pituitary cancer lung carcinoma diabetes mellitus major depressive disorder Emery-Dreifuss muscular dystrophy erythrokeratodermia variabilis et progressiva 1 myocardial infarction gastric carcinoma nasopharyngeal carcinoma heart disease ovarian cancer invasive ductal breast carcinoma pancreatic ductal adenocarcinoma leukodystrophy pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia lung benign neoplasm primitive neuroectodermal tumor right atrial isomerism malignant mesothelioma ulcerative colitis Down syndrome malignant pancreatic neoplasm erythrokeratoderma medulloblastoma alopecia congenita keratosis palmoplantaris nonsyndromic genetic deafness autism hypotrichosis juvenile dermatomyositis pancreatic intraductal papillary-mucinous carcinoma

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B [auth G], C [auth B], D [auth C], E [auth D] A, B [auth G], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H, I, J, K, L	OPM	Transmembrane	Alpha-helical polytopic	Tetraspan junctional complexes	Connexin

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B [auth G], C [auth B], D [auth C], E [auth D] A, B [auth G], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H, I, J, K, L	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B [auth G], C [auth B], D [auth C], E [auth D] A, B [auth G], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H, I, J, K, L	MemProtMD	Annotated as membrane protein by MemProtMD

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.