7p0m

Structural highlights

Function

LONM_HUMAN 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.[HAMAP-Rule:MF_03120]^{[1] [2] [3] [4]}

References

1. ↑ Bota DA, Davies KJ. Lon protease preferentially degrades oxidized mitochondrial aconitase by an ATP-stimulated mechanism. Nat Cell Biol. 2002 Sep;4(9):674-80. PMID:12198491 doi:http://dx.doi.org/10.1038/ncb836
2. ↑ Ondrovicova G, Liu T, Singh K, Tian B, Li H, Gakh O, Perecko D, Janata J, Granot Z, Orly J, Kutejova E, Suzuki CK. Cleavage site selection within a folded substrate by the ATP-dependent lon protease. J Biol Chem. 2005 Jul 1;280(26):25103-10. Epub 2005 May 3. PMID:15870080 doi:http://dx.doi.org/10.1074/jbc.M502796200
3. ↑ Lu B, Yadav S, Shah PG, Liu T, Tian B, Pukszta S, Villaluna N, Kutejova E, Newlon CS, Santos JH, Suzuki CK. Roles for the human ATP-dependent Lon protease in mitochondrial DNA maintenance. J Biol Chem. 2007 Jun 15;282(24):17363-74. Epub 2007 Apr 9. PMID:17420247 doi:http://dx.doi.org/10.1074/jbc.M611540200
4. ↑ Wang N, Gottesman S, Willingham MC, Gottesman MM, Maurizi MR. A human mitochondrial ATP-dependent protease that is highly homologous to bacterial Lon protease. Proc Natl Acad Sci U S A. 1993 Dec 1;90(23):11247-51. PMID:8248235