YME1L1
Function
ATP-dependent metalloprotease that catalyzes the degradation of folded and unfolded proteins with a suitable degron sequence in the mitochondrial intermembrane region (PubMed:24315374, PubMed:26923599, PubMed:27786171, PubMed:31695197, PubMed:33237841, PubMed:36206740). Plays an important role in regulating mitochondrial morphology and function by cleaving OPA1 at position S2, giving rise to a form of OPA1 that promotes maintenance of normal mitochondrial structure and mitochondrial protein metabolism (PubMed:18076378, PubMed:26923599, PubMed:27495975, PubMed:33237841). Ensures cell proliferation, maintains normal cristae morphology and complex I respiration activity, promotes antiapoptotic activity and protects mitochondria from the accumulation of oxidatively damaged membrane proteins (PubMed:22262461). Required to control the accumulation of nonassembled respiratory chain subunits (NDUFB6, OX4 and ND1) (PubMed:22262461). Involved in the mitochondrial adaptation in response to various signals, such as stress or developmental cues, by mediating degradation of mitochondrial proteins to rewire the mitochondrial proteome (PubMed:31695197). Catalyzes degradation of mitochondrial proteins, such as translocases, lipid transfer proteins and metabolic enzymes in response to nutrient starvation in order to limit mitochondrial biogenesis: mechanistically, YME1L is activated by decreased phosphatidylethanolamine levels caused by LPIN1 activity in response to mTORC1 inhibition (PubMed:31695197). Acts as a regulator of adult neural stem cell self-renewal by promoting mitochondrial proteome rewiring, preserving neural stem and progenitor cells self-renewal (By similarity). Required for normal, constitutive degradation of PRELID1 (PubMed:27495975). Catalyzes the degradation of OMA1 in response to membrane depolarization (PubMed:26923599). Mediates degradation of TIMM17A downstream of the integrated stress response (ISR) (PubMed:24315374). Catalyzes degradation of MICU1 when MICU1 is not assembled via an interchain disulfide (PubMed:36206740).
Involvement in disease
Optic atrophy 11
OPA11
An autosomal recessive disease characterized by progressive visual loss in association with optic atrophy. Atrophy of the optic disk indicates a deficiency in the number of nerve fibers which arise in the retina and converge to form the optic disk, optic nerve, optic chiasm and optic tracts. OPA11 patients also manifest delayed psychomotor development, intellectual disability, ataxia, and leukoencephalopathy on brain imaging.
None
The disease may be caused by variants affecting the gene represented in this entry.
Post-translational modifications
Proteolytically processed by mitochondrial processing peptidase (MPP) to generate the mature form (PubMed:27495975). Degraded in an OMA1-dependent manner in response to oxidative stress (PubMed:27495975).
Sequence Similarities
In the N-terminal section; belongs to the AAA ATPase family.
In the C-terminal section; belongs to the peptidase M41 family.
Tissue Specificity
High expression in cardiac and skeletal muscle mitochondria.
Cellular localization
- Mitochondrion inner membrane
- Mitochondrion
Alternative names
FTSH1, YME1L, UNQ1868/PRO4304, YME1L1, ATP-dependent zinc metalloprotease YME1L1, ATP-dependent metalloprotease FtsH1, Meg-4, Presenilin-associated metalloprotease, YME1-like protein 1, PAMP