UniProt functional annotation for Q08209

UniProt code: Q08209.

Organism: Homo sapiens (Human).
Taxonomy: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.
 
Function: Calcium-dependent, calmodulin-stimulated protein phosphatase. Many of the substrates contain a PxIxIT motif. This subunit may have a role in the calmodulin activation of calcineurin. Dephosphorylates DNM1L, HSPB1 and SSH1. {ECO:0000269|PubMed:15671020, ECO:0000269|PubMed:17498738, ECO:0000269|PubMed:18838687}.
 
Catalytic activity: [a protein]-serine/threonine phosphate + H(2)O = [a protein]-serine/threonine + phosphate.
Cofactor: Binds 1 Fe(3+) ion per subunit.
Cofactor: Binds 1 zinc ion per subunit.
Subunit: Interacts with CIB1; the interaction increases upon cardiomyocytes hypertrophy (By similarity). Interacts with CHP1 and CHP2 (By similarity). Composed of two components (A and B), the A component is the catalytic subunit and the B component confers calcium sensitivity. Interacts with CRTC2, MYOZ1, MYOZ2 and MYOZ3. Interacts with DNM1L; the interaction dephosphorylates DNM1L and regulates its translocation to mitochondria. Interacts with CMYA5; this interaction represses calcineurin activity in muscle (By similarity). {ECO:0000250}.
Subcellular location: Cell membrane {ECO:0000250}. Cell membrane, sarcolemma {ECO:0000250}. Nucleus {ECO:0000250}. Note=Colocalizes with ACTN1 and MYOZ2 at the Z line in heart and skeletal muscle. {ECO:0000250}.
Similarity: Belongs to the PPP phosphatase family. PP-2B subfamily. {ECO:0000305}.

Annotations taken from UniProtKB at the EBI.