Essential component of the TIM23 complex, a complex that mediates the translocation of transit peptide-containing proteins across the mitochondrial inner membrane. Has some phosphatase activity in vitro; however such activity may not be relevant in vivo.
May participate in the release of snRNPs and SMN from the Cajal body.
Subcellular locations: Mitochondrion inner membrane
Subcellular locations: Nucleus speckle
Nuclear and enriched in speckles with snRNPs.
Widely expressed. Expressed at higher level in brain, kidney and liver (at protein level).