Annotations: 9KNX

Cryo-EM structure of human mitochondrial pyruvate carrier in the occluded conformation at pH 6.8

External Resource: Annotation

Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
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)
C	Beta-Casp	e9knxC1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Beta-Casp	ECOD (v295)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C	Heavy Chain	IGHV1	-	mitochondrial pyruvate carrier 2	SAbDab (2026-06-26)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B]	PF03650	Mitochondrial pyruvate carriers (MPC)	Mitochondrial pyruvate carriers	-	Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B]	Mitochondrial pyruvate carrier 2	transporter activity pyruvate transmembrane transporter activity monocarboxylic acid transmembrane transporter activity carboxylic acid transmembrane transporter activity transmembrane transporter activity identical protein binding protein binding binding	cellular localization carboxylic acid transmembrane transport carboxylic acid transport transport intracellular transport mitochondrial transmembrane transport establishment of localization transmembrane transport organic acid transport pyruvate transport localization intercellular transport import into the mitochondrion monocarboxylic acid transport pyruvate import into mitochondria cellular localization carboxylic acid transmembrane transport carboxylic acid transport transport intracellular transport mitochondrial transmembrane transport establishment of localization transmembrane transport organic acid transport pyruvate transport localization intercellular transport import into the mitochondrion monocarboxylic acid transport pyruvate import into mitochondria establishment of localization in cell pyruvate transmembrane transport cellular process mitochondrial transport	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 mitochondrial protein-containing complex protein-containing complex membrane protein complex transporter complex inner mitochondrial membrane protein complex transmembrane transporter complex mitochondrial pyruvate carrier complex
C	MPC specific nanobody 1	-	-	-
B [auth A]	Mitochondrial pyruvate carrier 1	transporter activity pyruvate transmembrane transporter activity monocarboxylic acid transmembrane transporter activity carboxylic acid transmembrane transporter activity transmembrane transporter activity	cellular localization carboxylic acid transmembrane transport carboxylic acid transport transport intracellular transport mitochondrial transmembrane transport establishment of localization transmembrane transport organic acid transport pyruvate transport localization intercellular transport import into the mitochondrion monocarboxylic acid transport pyruvate import into mitochondria cellular localization carboxylic acid transmembrane transport carboxylic acid transport transport intracellular transport mitochondrial transmembrane transport establishment of localization transmembrane transport organic acid transport pyruvate transport localization intercellular transport import into the mitochondrion monocarboxylic acid transport pyruvate import into mitochondria establishment of localization in cell pyruvate transmembrane transport cellular process mitochondrial transport	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

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B]	IPR005336	Mitochondrial pyruvate carrier	Family
B [auth A]	IPR005336	Mitochondrial pyruvate carrier	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth B]	: O95563	astrocytic tumor large cell medulloblastoma malignant glioma osteosarcoma Pick disease primitive neuroectodermal tumor ulcerative colitis atypical teratoid rhabdoid tumor lung cancer medulloblastoma pancreatic ductal adenocarcinoma pilocytic astrocytoma schizophrenia glioblastoma malignant ependymoma astrocytic tumor large cell medulloblastoma malignant glioma osteosarcoma Pick disease primitive neuroectodermal tumor ulcerative colitis atypical teratoid rhabdoid tumor lung cancer medulloblastoma pancreatic ductal adenocarcinoma pilocytic astrocytoma schizophrenia glioblastoma malignant ependymoma oligodendroglioma pancreatic intraductal papillary-mucinous neoplasm plasma cell myeloma Sjogren syndrome
B [auth A]	: Q9Y5U8	mitochondrial pyruvate carrier deficiency substance dependence Substance-Related Disorders lung adenocarcinoma malignant pancreatic neoplasm pancreatic ductal adenocarcinoma substance abuse drug dependence gastric carcinoma lung cancer medulloblastoma plasma cell myeloma substance-related disorder large cell medulloblastoma malignant mesothelioma mitochondrial pyruvate carrier deficiency substance dependence Substance-Related Disorders lung adenocarcinoma malignant pancreatic neoplasm pancreatic ductal adenocarcinoma substance abuse drug dependence gastric carcinoma lung cancer medulloblastoma plasma cell myeloma substance-related disorder large cell medulloblastoma malignant mesothelioma ovarian cancer

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A [auth B], B [auth A]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A [auth B], B [auth A]	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth B], B [auth A]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Amino Acid/Polyamine/Organocation (APC) Superfamily	mitochondrial pyruvate carrier (MCP1/MCP2), intermembrane space (IMS)-open conformation, pH 8.0

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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.