6WDN | pdb_00006wdn

Cryo-EM structure of mitochondrial calcium uniporter holocomplex in low Ca2+

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
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)
J [auth E]	MCU_C	e6wdnE1	A: alpha arrays	X: Mitochondrial calcium uniporter (MCU) (From Topology)	H: Mitochondrial calcium uniporter (MCU) (From Topology)	T: Mitochondrial calcium uniporter (MCU)	F: MCU_C	ECOD (1.6)
H [auth I]	MCU_C	e6wdnI1	A: alpha arrays	X: Mitochondrial calcium uniporter (MCU) (From Topology)	H: Mitochondrial calcium uniporter (MCU) (From Topology)	T: Mitochondrial calcium uniporter (MCU)	F: MCU_C	ECOD (1.6)
F [auth G]	MCU_C	e6wdnG1	A: alpha arrays	X: Mitochondrial calcium uniporter (MCU) (From Topology)	H: Mitochondrial calcium uniporter (MCU) (From Topology)	T: Mitochondrial calcium uniporter (MCU)	F: MCU_C	ECOD (1.6)
D [auth C]	MCU_C	e6wdnC1	A: alpha arrays	X: Mitochondrial calcium uniporter (MCU) (From Topology)	H: Mitochondrial calcium uniporter (MCU) (From Topology)	T: Mitochondrial calcium uniporter (MCU)	F: MCU_C	ECOD (1.6)
B	EF-hand_7_3	e6wdnB2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_3	ECOD (1.6)
B	EF-hand_7_12	e6wdnB1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_12	ECOD (1.6)
A	EF-hand_7_3	e6wdnA1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_3	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
D [auth C], F [auth G], H [auth I], J [auth E]	PF04678	Mitochondrial calcium uniporter (MCU)	Mitochondrial calcium uniporter	-	Family
C [auth F], E [auth D], G [auth H], I [auth J]	PF10161	Putative mitochondrial precursor protein (DDDD)	Putative mitochondrial precursor protein	-	Family
B	PF13202	EF hand (EF-hand_5)	EF hand		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D [auth C], F [auth G], H [auth I], J [auth E]	Calcium uniporter protein, mitochondrial	active transmembrane transporter activity transporter activity uniporter activity transmembrane transporter activity secondary active transmembrane transporter activity calcium channel activity monoatomic cation transmembrane transporter activity monoatomic ion channel activity monoatomic cation channel activity passive transmembrane transporter activity calcium ion transmembrane transporter activity channel activity monoatomic ion transmembrane transporter activity metal ion transmembrane transporter activity active transmembrane transporter activity transporter activity uniporter activity transmembrane transporter activity secondary active transmembrane transporter activity calcium channel activity monoatomic cation transmembrane transporter activity monoatomic ion channel activity monoatomic cation channel activity passive transmembrane transporter activity calcium ion transmembrane transporter activity channel activity monoatomic ion transmembrane transporter activity metal ion transmembrane transporter activity identical protein binding protein binding binding	cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein-containing complex assembly cellular process cellular component organization or biogenesis transport monoatomic ion transmembrane transport establishment of localization calcium ion transport metal ion transport monoatomic cation transmembrane transport cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein-containing complex assembly cellular process cellular component organization or biogenesis transport monoatomic ion transmembrane transport establishment of localization calcium ion transport metal ion transport monoatomic cation transmembrane transport transmembrane transport localization mitochondrial calcium ion transmembrane transport monoatomic ion transport calcium import into the mitochondrion monoatomic cation transport calcium ion transmembrane transport positive regulation of organelle organization regulation of cellular component organization regulation of cellular process positive regulation of cellular component organization regulation of developmental process positive regulation of biological process positive regulation of developmental process anatomical structure development positive regulation of cellular process regulation of anatomical structure morphogenesis mitochondrion organization developmental process regulation of biological process organelle fission biological regulation mitochondrial fission regulation of organelle organization anatomical structure morphogenesis organelle organization regulation of mitochondrial fission regulation of mitochondrion organization positive regulation of mitochondrial fission positive regulation of cell communication regulation of localization establishment of protein localization nitrogen compound transport positive regulation of establishment of protein localization cell communication positive regulation of insulin secretion intracellular protein localization regulation of biological quality regulation of peptide hormone secretion regulation of hormone levels positive regulation of peptide hormone secretion establishment of protein localization to extracellular region protein secretion regulation of protein secretion regulation of secretion positive regulation of protein localization regulation of hormone secretion regulation of protein localization regulation of peptide secretion signaling positive regulation of secretion by cell hormone secretion protein localization to extracellular region positive regulation of protein transport peptide secretion regulation of secretion by cell secretion by cell positive regulation of hormone secretion positive regulation of secretion amide transport signal release positive regulation of peptide secretion regulation of signaling regulation of transport secretion regulation of peptide transport regulation of establishment of protein localization export from cell cell-cell signaling regulation of protein transport positive regulation of protein secretion peptide transport positive regulation of transport protein transport regulation of insulin secretion peptide hormone secretion macromolecule localization hormone transport regulation of cell communication insulin secretion positive regulation of signaling cellular response to stimulus positive regulation of locomotion regulation of cell motility response to stimulus positive regulation of chemotaxis positive regulation of cell migration positive regulation of neutrophil chemotaxis taxis cell migration regulation of immune system process positive regulation of immune system process chemotaxis regulation of leukocyte chemotaxis regulation of leukocyte migration response to external stimulus positive regulation of leukocyte chemotaxis neutrophil migration granulocyte migration leukocyte migration positive regulation of granulocyte chemotaxis regulation of response to stimulus response to chemical regulation of locomotion regulation of neutrophil chemotaxis regulation of neutrophil migration regulation of response to external stimulus neutrophil chemotaxis positive regulation of response to stimulus regulation of granulocyte chemotaxis positive regulation of response to external stimulus positive regulation of cell motility regulation of cell migration myeloid leukocyte migration cell motility locomotion cell chemotaxis positive regulation of leukocyte migration positive regulation of neutrophil migration regulation of chemotaxis cellular response to chemical stimulus immune system process granulocyte chemotaxis leukocyte chemotaxis intracellular signal transduction calcium-mediated signaling intracellular signaling cassette signal transduction mitochondrial calcium ion homeostasis inorganic ion homeostasis intracellular calcium ion homeostasis homeostatic process calcium ion homeostasis cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis positive regulation of mitochondrial calcium ion concentration glucose homeostasis carbohydrate homeostasis cellular response to nutrient levels response to nutrient levels cellular response to stress response to stress response to starvation cellular response to calcium ion starvation cellular response to starvation	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane protein-containing complex transmembrane transporter complex membrane protein complex cation channel complex transporter complex calcium channel complex monoatomic ion channel complex uniplex complex mitochondrial protein-containing complex inner mitochondrial membrane protein complex
C [auth F], E [auth D], G [auth H], I [auth J]	Essential MCU regulator, mitochondrial	transporter activator activity channel regulator activity molecular function activator activity molecular function regulator activity channel activator activity transporter regulator activity protein-macromolecule adaptor activity molecular adaptor activity	transport monoatomic ion transmembrane transport establishment of localization calcium ion transport metal ion transport monoatomic cation transmembrane transport transmembrane transport localization mitochondrial calcium ion transmembrane transport monoatomic ion transport cellular process calcium import into the mitochondrion monoatomic cation transport calcium ion transmembrane transport transport monoatomic ion transmembrane transport establishment of localization calcium ion transport metal ion transport monoatomic cation transmembrane transport transmembrane transport localization mitochondrial calcium ion transmembrane transport monoatomic ion transport cellular process calcium import into the mitochondrion monoatomic cation transport calcium ion transmembrane transport mitochondrial calcium ion homeostasis inorganic ion homeostasis intracellular calcium ion homeostasis homeostatic process calcium ion homeostasis cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis cellular response to stimulus cellular response to nutrient levels response to nutrient levels response to stimulus cellular response to stress response to stress response to starvation cellular response to calcium ion starvation cellular response to starvation	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen mitochondrial matrix protein-containing complex membrane protein complex transporter complex uniplex complex mitochondrial protein-containing complex cation channel complex inner mitochondrial membrane protein complex transmembrane transporter complex calcium channel complex monoatomic ion channel complex
B	Calcium uptake protein 1, mitochondrial	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding protein heterodimerization activity protein binding protein dimerization activity channel regulator activity ion channel regulator activity calcium channel regulator activity molecular function regulator activity transporter regulator activity cation binding ion binding binding calcium ion binding metal ion binding small molecule binding protein heterodimerization activity protein binding protein dimerization activity channel regulator activity ion channel regulator activity calcium channel regulator activity molecular function regulator activity transporter regulator activity molecular sensor activity calcium ion sensor activity metal ion sensor activity molecular function inhibitor activity transporter inhibitor activity calcium channel inhibitor activity ion channel inhibitor activity channel inhibitor activity identical protein binding	transport monoatomic ion transmembrane transport establishment of localization calcium ion transport metal ion transport monoatomic cation transmembrane transport transmembrane transport localization mitochondrial calcium ion transmembrane transport monoatomic ion transport cellular process calcium import into the mitochondrion monoatomic cation transport calcium ion transmembrane transport transport monoatomic ion transmembrane transport establishment of localization calcium ion transport metal ion transport monoatomic cation transmembrane transport transmembrane transport localization mitochondrial calcium ion transmembrane transport monoatomic ion transport cellular process calcium import into the mitochondrion monoatomic cation transport calcium ion transmembrane transport membrane organization positive regulation of organelle organization regulation of biological process regulation of cellular component organization regulation of cellular process positive regulation of cellular component organization cristae formation inner mitochondrial membrane organization regulation of cristae formation biological regulation positive regulation of biological process regulation of organelle organization mitochondrial membrane organization cellular component organization positive regulation of cristae formation organelle organization regulation of mitochondrion organization cellular component organization or biogenesis positive regulation of cellular process mitochondrion organization mitochondrial calcium ion homeostasis inorganic ion homeostasis intracellular calcium ion homeostasis homeostatic process calcium ion homeostasis cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis cellular response to stimulus cellular response to nutrient levels response to nutrient levels response to stimulus cellular response to stress response to stress response to starvation cellular response to calcium ion starvation cellular response to starvation defense response regulation of cellular hyperosmotic salinity response regulation of cellular response to stress cellular hyperosmotic salinity response cellular response to chemical stress response to salt stress regulation of response to osmotic stress cellular response to environmental stimulus hyperosmotic salinity response regulation of response to salt stress hyperosmotic response regulation of cellular response to osmotic stress cellular hyperosmotic response regulation of response to stress response to osmotic stress cellular response to salt stress cellular response to osmotic stress cellular response to chemical stimulus regulation of response to stimulus response to chemical response to abiotic stimulus cellular response to abiotic stimulus cellular response to metal ion response to metal ion cellular response to calcium ion response to calcium ion calcium ion import cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein-containing complex assembly protein homooligomerization positive regulation of mitochondrial calcium ion concentration	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane mitochondrial crista junction organelle membrane contact site protein-containing complex transmembrane transporter complex membrane protein complex cation channel complex transporter complex calcium channel complex monoatomic ion channel complex mitochondrial intermembrane space membrane-enclosed lumen intracellular organelle lumen organelle envelope lumen organelle lumen uniplex complex mitochondrial protein-containing complex inner mitochondrial membrane protein complex
A	Calcium uptake protein 2, mitochondrial	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding molecular sensor activity calcium ion sensor activity molecular function regulator activity metal ion sensor activity protein heterodimerization activity protein binding protein dimerization activity channel regulator activity cation binding ion binding binding calcium ion binding metal ion binding small molecule binding molecular sensor activity calcium ion sensor activity molecular function regulator activity metal ion sensor activity protein heterodimerization activity protein binding protein dimerization activity channel regulator activity ion channel regulator activity calcium channel regulator activity transporter regulator activity	transport monoatomic ion transmembrane transport establishment of localization calcium ion transport metal ion transport monoatomic cation transmembrane transport transmembrane transport localization mitochondrial calcium ion transmembrane transport monoatomic ion transport cellular process calcium import into the mitochondrion monoatomic cation transport calcium ion transmembrane transport transport monoatomic ion transmembrane transport establishment of localization calcium ion transport metal ion transport monoatomic cation transmembrane transport transmembrane transport localization mitochondrial calcium ion transmembrane transport monoatomic ion transport cellular process calcium import into the mitochondrion monoatomic cation transport calcium ion transmembrane transport mitochondrial calcium ion homeostasis inorganic ion homeostasis intracellular calcium ion homeostasis homeostatic process calcium ion homeostasis cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis negative regulation of mitochondrial calcium ion concentration positive regulation of mitochondrial calcium ion concentration cellular response to stimulus cellular response to metal ion cellular response to chemical stimulus response to stimulus response to metal ion response to chemical cellular response to calcium ion response to calcium ion	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane protein-containing complex transmembrane transporter complex membrane protein complex cation channel complex transporter complex calcium channel complex monoatomic ion channel complex mitochondrial intermembrane space membrane-enclosed lumen intracellular organelle lumen organelle envelope lumen organelle lumen uniplex complex mitochondrial protein-containing complex inner mitochondrial membrane protein complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
D [auth C], F [auth G], H [auth I], J [auth E]	IPR006769	Calcium uniporter protein, C-terminal	Domain
D [auth C], F [auth G], H [auth I], J [auth E]	IPR039055	MCU family	Family
C [auth F], E [auth D], G [auth H], I [auth J]	IPR018782	Essential MCU regulator, mitochondrial	Family
B	IPR039800	Calcium uptake protein 1/2/3	Family
B	IPR002048	EF-hand domain	Domain
B	IPR011992	EF-hand domain pair	Homologous Superfamily
B	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
A	IPR039800	Calcium uptake protein 1/2/3	Family
A	IPR002048	EF-hand domain	Domain
A	IPR011992	EF-hand domain pair	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
D [auth C], F [auth G], H [auth I], J [auth E]	Pharos: Q8NE86	heart disease pancreatic ductal adenocarcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia malignant pancreatic neoplasm pancreatic intraductal papillary-mucinous carcinoma pituitary cancer osteosarcoma pancreatic intraductal papillary-mucinous neoplasm
C [auth F], E [auth D], G [auth H], I [auth J]	Pharos: Q9H4I9	autism spectrum disorder oligodendroglioma pancreatic ductal adenocarcinoma Tourette syndrome breast cancer osteosarcoma pancreatic intraductal papillary-mucinous neoplasm breast carcinoma ovarian cancer pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia
B	Pharos: Q9BPX6	proximal myopathy with extrapyramidal signs myopathy basal ganglia disease pancreatic intraductal papillary-mucinous carcinoma Adult Learning Disorders congenital muscular dystrophy muscle tissue disease osteosarcoma pancreatic intraductal papillary-mucinous neoplasm tuberculosis arthrogryposis learning disability movement disorder muscular disease ovarian cancer proximal myopathy with extrapyramidal signs myopathy basal ganglia disease pancreatic intraductal papillary-mucinous carcinoma Adult Learning Disorders congenital muscular dystrophy muscle tissue disease osteosarcoma pancreatic intraductal papillary-mucinous neoplasm tuberculosis arthrogryposis learning disability movement disorder muscular disease ovarian cancer pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia intellectual disability malignant glioma
A	Pharos: Q8IYU8	hereditary spastic paraplegia progressive supranuclear palsy lymphoplasmacytic lymphoma psoriasis ovarian cancer

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B, C [auth F], D [auth C], E [auth D] A, B, C [auth F], D [auth C], E [auth D], F [auth G], G [auth H], H [auth I], I [auth J], J [auth E]	OPM	Transmembrane	Alpha-helical polytopic	Mitochondrial calcium uniporter	Mitochondrial calcium uniporter

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

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

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

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

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B, C [auth F], D [auth C], E [auth D] A, B, C [auth F], D [auth C], E [auth D], F [auth G], G [auth H], H [auth I], I [auth J], J [auth E]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Channels: Calcium Ion-Selective	mitochondrial calcium uniporter (MCU) holocomplex, low Ca²⁺

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.