Prostatic Acid Phosphatase (ACPP) Active Protein

This gene encodes an enzyme that catalyzes the conversion of orthophosphoric monoester to alcohol and orthophosphate. It is synthesized under androgen regulation and is secreted by the epithelial cells of the prostate gland. An alternatively spliced transcript variant encoding a longer isoform has been found for this gene. This isoform contains a transmembrane domain and is localized in the plasma membrane-endosomal-lysosomal pathway. [provided by RefSeq, Sep 2008]

ACPP: A non-specific tyrosine phosphatase that dephosphorylates a diverse number of substrates under acidic conditions (pH 4-6) including alkyl, aryl, and acyl orthophosphate monoesters and phosphorylated proteins. Has lipid phosphatase activity and inactivates lysophosphatidic acid in seminal plasma. Belongs to the histidine acid phosphatase family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Motility/polarity/chemotaxis; EC 3.1.3.2; Cofactor and Vitamin Metabolism - riboflavin; EC 3.1.3.5; Phosphatase

Chromosomal Location of Human Ortholog: 3q22.1

Cellular Component: multivesicular body; extracellular space; Golgi cisterna; apical part of cell; lysosomal membrane; integral to membrane; plasma membrane; intracellular; vesicle membrane; nucleus; filopodium; secretory granule

Molecular Function: 5'-nucleotidase activity; choline binding; identical protein binding; acid phosphatase activity; protein homodimerization activity; phosphoric monoester hydrolase activity; thiamin phosphate phosphatase activity

Biological Process: thiamin metabolic process; dephosphorylation; positive regulation of adenosine receptor signaling pathway; nucleotide metabolic process; regulation of sensory perception of pain; adenosine metabolic process; purine base metabolic process