LONP1 Antibody – Rabbit Polyclonal

This gene encodes a mitochondrial matrix protein that belongs to the Lon family of ATP-dependent proteases. This protein mediates the selective degradation of misfolded, unassembled or oxidatively damaged polypeptides in the mitochondrial matrix. It may also have a chaperone function in the assembly of inner membrane protein complexes, and participate in the regulation of mitochondrial gene expression and maintenance of the integrity of the mitochondrial genome. Decreased expression of this gene has been noted in a patient with hereditary spastic paraplegia (PMID:18378094). Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Feb 2013]

Function: ATP-dependent serine protease that mediates the selective degradation of misfolded, unassembled or oxidatively damaged polypeptides as well as certain short-lived regulatory proteins in the mitochondrial matrix. May also have a chaperone function in the assembly of inner membrane protein complexes. Participates in the regulation of mitochondrial gene expression and in the maintenance of the integrity of the mitochondrial genome. Binds to mitochondrial promoters and RNA in a single-stranded, site-specific, and strand-specific manner. May regulate mitochondrial DNA replication and/or gene expression using site-specific, single-stranded DNA binding to target the degradation of regulatory proteins binding to adjacent sites in mitochondrial promoters. Endogenous substrates include mitochondrial steroidogenic acute regulatory (StAR) protein. Ref.1 Ref.9 Ref.11 Ref.12

Subunit structure: Homohexamer or homoheptamer. Organized in a ring with a central cavity. DNA and RNA binding is stimulated by substrate and inhibited by ATP binding. Interacts with PEO1 and mitochondrial DNA polymerase subunit POLG. Ref.10 Ref.15

Subcellular location: Mitochondrion matrix Ref.7.

Tissue specificity: Duodenum, heart, lung and liver, but not thymus.

Sequence similarities: Belongs to the peptidase S16 family.Contains 1 Lon domain.

Sequence caution: The sequence CAA52291.1 differs from that shown. Reason: Erroneous initiation.