6XQN

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)
C [auth B]	SCOP2B Superfamily	MCU pore-forming region-like	8097610	3002699	SCOP2B (2022-06-29)
E [auth C]	SCOP2B Superfamily	MCU pore-forming region-like	8097610	3002699	SCOP2B (2022-06-29)
G [auth D]	SCOP2B Superfamily	MCU pore-forming region-like	8097610	3002699	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth A]	MCU_C	e6xqnA1	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)
C [auth B]	MCU_C	e6xqnB1	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)
E [auth C]	MCU_C	e6xqnC1	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)
G [auth D]	MCU_C	e6xqnD1	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]	EF-hand_7_3	e6xqnI2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_3	ECOD (1.6)
H [auth I]	EF-hand_7_12	e6xqnI1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_12	ECOD (1.6)
I [auth J]	EF-hand_7_3	e6xqnJ1	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
A [auth E], D [auth G], F [auth H]	PF10161	Putative mitochondrial precursor protein (DDDD)	Putative mitochondrial precursor protein	-	Family
B [auth A], C [auth B], E [auth C], G [auth D]	PF04678	Mitochondrial calcium uniporter (MCU)	Mitochondrial calcium uniporter	-	Family
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
A [auth E], D [auth G], F [auth H]	Protein EMRE homolog, mitochondrial-like Protein	-	transport monoatomic ion transmembrane transport inorganic ion transmembrane transport mitochondrial transmembrane transport establishment of localization calcium ion transport metal ion transport inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization import into the mitochondrion mitochondrial calcium ion transmembrane transport monoatomic ion transport transport monoatomic ion transmembrane transport inorganic ion transmembrane transport mitochondrial transmembrane transport establishment of localization calcium ion transport metal ion transport inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization import into the mitochondrion mitochondrial calcium ion transmembrane transport monoatomic ion transport cellular process calcium import into the mitochondrion monoatomic cation transport calcium ion transmembrane transport mitochondrial 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 uniplex complex mitochondrial protein-containing complex membrane cation channel complex membrane-bounded organelle protein-containing complex intracellular anatomical structure mitochondrial membrane organelle inner membrane mitochondrion membrane protein complex transporter complex intracellular organelle organelle envelope uniplex complex mitochondrial protein-containing complex membrane cation channel complex cellular anatomical entity 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
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 inorganic molecular entity transmembrane transporter activity channel activity inorganic cation 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 inorganic molecular entity transmembrane transporter activity channel activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity metal ion transmembrane transporter activity	transport monoatomic ion transmembrane transport inorganic ion transmembrane transport mitochondrial transmembrane transport establishment of localization calcium ion transport metal ion transport inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization import into the mitochondrion mitochondrial calcium ion transmembrane transport monoatomic ion transport transport monoatomic ion transmembrane transport inorganic ion transmembrane transport mitochondrial transmembrane transport establishment of localization calcium ion transport metal ion transport inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization import into the mitochondrion mitochondrial calcium ion transmembrane transport monoatomic ion transport cellular process calcium import into the mitochondrion monoatomic cation transport calcium ion transmembrane transport mitochondrial 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 uniplex complex mitochondrial protein-containing complex membrane cation channel complex membrane-bounded organelle protein-containing complex intracellular anatomical structure mitochondrial membrane organelle inner membrane mitochondrion membrane protein complex transporter complex intracellular organelle organelle envelope uniplex complex mitochondrial protein-containing complex membrane cation channel complex cellular anatomical entity 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
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 identical protein binding	transport monoatomic ion transmembrane transport inorganic ion transmembrane transport mitochondrial transmembrane transport establishment of localization calcium ion transport metal ion transport inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization import into the mitochondrion mitochondrial calcium ion transmembrane transport monoatomic ion transport transport monoatomic ion transmembrane transport inorganic ion transmembrane transport mitochondrial transmembrane transport establishment of localization calcium ion transport metal ion transport inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization import into the mitochondrion mitochondrial calcium ion transmembrane transport monoatomic ion transport cellular process calcium import into the mitochondrion monoatomic cation transport calcium ion transmembrane transport mitochondrial transport calcium ion import cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein-containing complex assembly protein homooligomerization cellular component organization or biogenesis 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 response to stimulus defense response response to stress cellular response to stimulus regulation of cellular hyperosmotic salinity response regulation of cellular process 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 cellular response to stress regulation of response to stress response to osmotic stress regulation of biological process cellular response to salt stress biological regulation 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	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity 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
I [auth J]	Calcium uptake protein 2, mitochondrial	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding protein heterodimerization activity protein binding protein dimerization activity	transport monoatomic ion transmembrane transport inorganic ion transmembrane transport mitochondrial transmembrane transport establishment of localization calcium ion transport metal ion transport inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization import into the mitochondrion mitochondrial calcium ion transmembrane transport monoatomic ion transport transport monoatomic ion transmembrane transport inorganic ion transmembrane transport mitochondrial transmembrane transport establishment of localization calcium ion transport metal ion transport inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization import into the mitochondrion mitochondrial calcium ion transmembrane transport monoatomic ion transport cellular process calcium import into the mitochondrion monoatomic cation transport calcium ion transmembrane transport mitochondrial 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	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity 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
A [auth E], D [auth G], F [auth H]	IPR018782	Essential MCU regulator, mitochondrial	Family
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
H [auth I]	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
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
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

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
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
I [auth J]	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 [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				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 National Science Foundation (DBI-1832184), 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 R01GM133198.