6XQN | pdb_00006xqn

Structure of a mitochondrial calcium uniporter holocomplex (MICU1, MICU2, MCU, EMRE) in low Ca2+

External Resource: Annotation

Domain Annotation: SCOP2 Classification
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

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B [auth A]	SCOP2 Family	MCU pore-forming region-like	8097609	4007807	SCOP2 (2022-06-29)
B [auth A]	SCOP2 Superfamily	MCU pore-forming region-like	8097610	3002699	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
I [auth J]		e6xqnJ1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: CSD	F:	ECOD (20:10:01)
H [auth I]		e6xqnI1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: CSD	F:	ECOD (20:10:01)
G [auth D]		e6xqnD1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Pro_isomerase	F:	ECOD (20:10:01)
E [auth C]		e6xqnC1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Pro_isomerase	F:	ECOD (20:10:01)
C [auth B]		e6xqnB1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: CSD	F:	ECOD (20:10:01)
B [auth A]		e6xqnA1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Pro_isomerase	F:	ECOD (20:10:01)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
H [auth I]	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
I [auth J]	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
H [auth I]	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 molecular sensor activity calcium ion sensor activity molecular function regulator activity metal ion sensor activity molecular function inhibitor activity cation binding ion binding binding calcium ion binding metal ion binding small molecule binding protein heterodimerization activity protein binding protein dimerization activity molecular sensor activity calcium ion sensor activity molecular function regulator activity metal ion sensor activity molecular function inhibitor activity channel regulator activity transporter inhibitor activity calcium channel inhibitor activity ion channel inhibitor activity ion channel regulator activity calcium channel regulator activity transporter regulator 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
B [auth A], C [auth B], E [auth C], G [auth D]	Calcium uniporter protein	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 cation binding ion binding binding metal ion binding small molecule 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 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	membrane-bounded organelle protein-containing complex intracellular anatomical structure mitochondrial membrane organelle inner membrane mitochondrion membrane protein complex transporter complex intracellular organelle organelle envelope cellular anatomical structure uniplex complex mitochondrial protein-containing complex membrane membrane-bounded organelle protein-containing complex intracellular anatomical structure mitochondrial membrane organelle inner membrane mitochondrion membrane protein complex transporter complex intracellular organelle organelle envelope cellular anatomical structure uniplex complex mitochondrial protein-containing complex membrane cation channel complex intracellular membrane-bounded organelle mitochondrial inner membrane inner mitochondrial membrane protein complex transmembrane transporter complex organelle mitochondrial envelope cytoplasm organelle membrane calcium channel complex monoatomic ion channel complex
A [auth E], D [auth G], F [auth H]	Protein EMRE homolog, mitochondrial-like Protein	-	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	membrane-bounded organelle protein-containing complex intracellular anatomical structure mitochondrial membrane organelle inner membrane mitochondrion membrane protein complex transporter complex intracellular organelle organelle envelope cellular anatomical structure uniplex complex mitochondrial protein-containing complex membrane membrane-bounded organelle protein-containing complex intracellular anatomical structure mitochondrial membrane organelle inner membrane mitochondrion membrane protein complex transporter complex intracellular organelle organelle envelope cellular anatomical structure uniplex complex mitochondrial protein-containing complex membrane cation channel complex intracellular membrane-bounded organelle mitochondrial inner membrane inner mitochondrial membrane protein complex transmembrane transporter complex organelle mitochondrial envelope cytoplasm organelle membrane calcium channel complex monoatomic ion channel complex

InterPro: Protein Family Classification InterPro Database Homepage

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

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
I [auth J]	Pharos: Q8IYU8	hereditary spastic paraplegia progressive supranuclear palsy lymphoplasmacytic lymphoma psoriasis ovarian cancer
H [auth I]	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

Membrane Protein Annotation: OPM OPM Database Homepage

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

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

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

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.