Description
Product Characteristics:
The inositol polyphosphate 5-phosphatases selectively remove the phosphate from the 5-position of various phosphatidylinositols, which generate second messengers in response to extracellular signals. Synaptojanins are characterized by an N-terminal SAC1-like sequence, a central 5-phosphate domain, and a unique C-terminal sequence and have been shown to use phosphatidylinositol 4,5-bisphosphate as a substrate. Synaptojanins exist as two isoforms, synaptojanin 1 and 2, which differ in the C-terminal domain, and each isoform has multiple variants produced by alternative splicing. Synaptojanin 1 is expressed as two major forms: the shorter is found in brain while the longer is expressed in peripheral tissues. Eight splice variants of synaptojanin 2 have been detected, including a brain specific isoform. Synaptojanins are thought to participate in the endocytosis of synaptic vesicles and the regulation of the actin cytoskeleton.
Subcellular location: Cytoplasm
Synonyms: 5-trisphosphate 5-phosphatase 1, Inositol 5' phosphatase, INPP 5G, INPP5G, KIAA0910, Polyphosphoinositide phosphatase, Synaptic inositol 1 4 5 trisphosphate 5 phosphatase 1, Synaptic inositol 145 trisphosphate 5 phosphatase 1, Synaptic inositol-1 antibody Synaptic inositol-145-trisphosphate 5-phosphatase 1, Synaptojanin 1, Synaptojanin 1 polyphosphoinositide phosphatase, Synaptojanin-1, Synaptojanin1, Synj 1, Synj1, SYNJ1_HUMAN.
Target Information: This gene encodes a phosphoinositide phosphatase that regulates levels of membrane phosphatidylinositol-4,5-bisphosphate. As such, expression of this enzyme may affect synaptic transmission and membrane trafficking. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2011]