7XQB | pdb_00007xqb

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

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
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)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.1440.80	Mainly Alpha	Up-down Bundle	de novo design (two linked rop proteins)	Gap junction channel protein cysteine-rich domain	CATH (utative)
B [auth G]	1.20.1440.80	Mainly Alpha	Up-down Bundle	de novo design (two linked rop proteins)	Gap junction channel protein cysteine-rich domain	CATH (utative)
C [auth B]	1.20.1440.80	Mainly Alpha	Up-down Bundle	de novo design (two linked rop proteins)	Gap junction channel protein cysteine-rich domain	CATH (utative)
D [auth C]	1.20.1440.80	Mainly Alpha	Up-down Bundle	de novo design (two linked rop proteins)	Gap junction channel protein cysteine-rich domain	CATH (utative)
E [auth D]	1.20.1440.80	Mainly Alpha	Up-down Bundle	de novo design (two linked rop proteins)	Gap junction channel protein cysteine-rich domain	CATH (utative)
F [auth E]	1.20.1440.80	Mainly Alpha	Up-down Bundle	de novo design (two linked rop proteins)	Gap junction channel protein cysteine-rich domain	CATH (utative)
G [auth F]	1.20.1440.80	Mainly Alpha	Up-down Bundle	de novo design (two linked rop proteins)	Gap junction channel protein cysteine-rich domain	CATH (utative)
H	1.20.1440.80	Mainly Alpha	Up-down Bundle	de novo design (two linked rop proteins)	Gap junction channel protein cysteine-rich domain	CATH (utative)
I	1.20.1440.80	Mainly Alpha	Up-down Bundle	de novo design (two linked rop proteins)	Gap junction channel protein cysteine-rich domain	CATH (utative)
J	1.20.1440.80	Mainly Alpha	Up-down Bundle	de novo design (two linked rop proteins)	Gap junction channel protein cysteine-rich domain	CATH (utative)
K	1.20.1440.80	Mainly Alpha	Up-down Bundle	de novo design (two linked rop proteins)	Gap junction channel protein cysteine-rich domain	CATH (utative)
L	1.20.1440.80	Mainly Alpha	Up-down Bundle	de novo design (two linked rop proteins)	Gap junction channel protein cysteine-rich domain	CATH (utative)

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	glutathione transmembrane transporter activity tripeptide transmembrane transporter activity sulfur compound transmembrane transporter activity oligopeptide transmembrane transporter activity amide transmembrane transporter activity transporter activity transmembrane transporter activity modified amino acid transmembrane transporter activity organic anion transmembrane transporter activity cytoskeletal protein binding protein binding binding tubulin binding alpha-tubulin binding glutathione transmembrane transporter activity tripeptide transmembrane transporter activity sulfur compound transmembrane transporter activity oligopeptide transmembrane transporter activity amide transmembrane transporter activity transporter activity transmembrane transporter activity modified amino acid transmembrane transporter activity organic anion transmembrane transporter activity cytoskeletal protein binding protein binding binding tubulin binding alpha-tubulin binding monoatomic ion transmembrane transporter activity wide pore channel activity passive transmembrane transporter activity channel activity gap junction channel activity gap junction channel activity involved in cell communication by electrical coupling gap junction channel activity involved in cardiac conduction electrical coupling gap junction hemi-channel activity beta-catenin 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 spermatogenesis sexual reproduction reproductive process multicellular organismal reproductive process developmental process involved in reproduction male gamete generation developmental process heart development multicellular organism development multicellular organismal process anatomical structure development animal organ development circulatory system development system development spermatogenesis sexual reproduction reproductive process multicellular organismal reproductive process developmental process involved in reproduction male gamete generation gamete generation localization macromolecule localization intracellular protein localization transport microtubule-based transport establishment of localization regulation of biosynthetic process regulation of biological process regulation of cellular process biological regulation positive regulation of biological process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process positive regulation of macromolecule biosynthetic process regulation of gene expression positive regulation of metabolic process biosynthetic process positive regulation of gene expression positive regulation of biosynthetic process regulation of macromolecule biosynthetic process metabolic process cellular process positive regulation of macromolecule metabolic process macromolecule metabolic process regulation of metabolic process positive regulation of cellular process xenobiotic transport skeletal system development bone development transmembrane transport export from cell export across plasma membrane signaling cell-cell signaling cell communication regulation of growth regulation of cellular component organization negative regulation of biological process growth negative regulation of cell growth regulation of cell growth cell growth cellular component organization negative regulation of growth negative regulation of cellular process cellular component organization or biogenesis regulation of localization system process regulation of hormone secretion gonadotropin secretion negative regulation of signaling regulation of system process negative regulation of transport hormone secretion negative regulation of cell communication secretion by cell regulation of secretion by cell negative regulation of secretion signal release negative regulation of hormone secretion regulation of multicellular organismal process negative regulation of secretion by cell regulation of biological quality regulation of signaling secretion 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 regulation of cell communication 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 establishment of organelle localization cellular localization microtubule cytoskeleton organization spindle localization establishment or maintenance of cell polarity mitotic cell cycle establishment of mitotic spindle localization establishment of spindle localization establishment of spindle orientation organelle localization establishment of localization in cell cell cycle 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 epithelium development regulation of developmental process morphogenesis of an epithelium tissue development positive regulation of developmental process tissue morphogenesis anatomical structure morphogenesis positive regulation of morphogenesis of an epithelium regulation of morphogenesis of an epithelium regulation of anatomical structure morphogenesis tissue remodeling bone remodeling cellular response to stimulus positive regulation of cell communication positive regulation of signal transduction positive regulation of canonical NF-kappaB signal transduction response to stimulus 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 intracellular signal transduction canonical NF-kappaB signal transduction regulation of response to stimulus regulation of canonical NF-kappaB signal transduction positive regulation of signaling heart process regulation of heart contraction 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 organic acid transport amino acid transport acidic amino acid transport dicarboxylic acid transport glutamate secretion 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 regulation of membrane 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 homeostatic process adaptive thermogenesis multicellular organismal-level homeostasis regulation of cold-induced thermogenesis cold-induced thermogenesis temperature homeostasis positive regulation of cold-induced thermogenesis positive regulation of multicellular organismal process cardiac conduction system development cardiac muscle tissue development striated muscle tissue development muscle tissue development mesodermal cell differentiation cellular developmental process mesoderm morphogenesis regulation of cell differentiation embryo development regulation of mesodermal cell differentiation positive regulation of cell differentiation cell differentiation mesoderm formation positive regulation of mesodermal cell differentiation mesoderm development formation of primary germ layer embryonic morphogenesis gastrulation anatomical structure formation involved in morphogenesis 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 maintenance of blood-brain barrier anatomical structure homeostasis tissue homeostasis 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	cellular anatomical structure intracellular anatomical structure cytoplasm membrane-bounded organelle intracellular organelle Golgi apparatus organelle intracellular membrane-bounded organelle endomembrane system Golgi membrane membrane bounding membrane of organelle organelle membrane cell-cell junction cellular anatomical structure intracellular anatomical structure cytoplasm membrane-bounded organelle intracellular organelle Golgi apparatus organelle intracellular membrane-bounded organelle endomembrane system Golgi membrane membrane bounding membrane of organelle organelle membrane cell-cell junction intercalated disc anchoring junction cell junction cell-cell contact zone protein-containing complex plasma membrane protein complex gap junction plasma membrane membrane protein complex cell periphery connexin complex mitochondrion 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 nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen organelle subcompartment endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum endoplasmic reticulum membrane tight junction

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	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	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	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	Connexin, 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 hypoplastic left heart syndrome 1 autosomal dominant palmoplantar keratoderma and congenital alopecia breast cancer cataract erythrokeratodermia variabilis et progressiva 3 hypertensive disorder Basaran Yilmaz syndrome coloboma lung cancer lymphatic system disease dermatomyositis syndactyly Duchenne muscular dystrophy myopathy osteosarcoma intellectual disability Becker muscular dystrophy large cell medulloblastoma pancreatic intraductal papillary-mucinous neoplasm lung adenocarcinoma pituitary cancer congenital diaphragmatic hernia lung carcinoma major depressive disorder diabetes mellitus Emery-Dreifuss muscular dystrophy myocardial infarction erythrokeratodermia variabilis et progressiva 1 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 malignant pancreatic neoplasm ulcerative colitis Down syndrome medulloblastoma erythrokeratoderma 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.