Description
Product Usage Information
Western Blotting: 1:1000
Immunoprecipitation: 1:50
Immunofluorescence (Frozen): 1:100
Storage
Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at -20°C. Do not aliquot the antibody. For a carrier free (BSA and azide free) version of this product see product # 85453 .
Protocol
Available protocols: Western Blotting, Immunoprecipitation, Immunofluorescence (Frozen)
Specificity / Sensitivity
STEP (23E5) Mouse Monoclonal Antibody detects endogenous levels of total STEP46 and STEP61 protein.
Species Reactivity: Mouse, Rat
Source / Purification
Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to the amino terminus of rat STEP46 protein.
Background
Striatal enriched phosphatase (STEP, also known as PTPN5), is a protein tyrosine phosphatase expressed in dopaminoceptive neurons of the central nervous system (1). Alternative splicing produces the cytosolic STEP46 and the membrane-associated STEP61 isoforms of STEP. Dopamine activates D1 receptors and PKA, which in turn phosphorylate both isoforms of STEP. Phosphorylation of STEP61 occurs at Ser160 and Ser221, while STEP46 is phosphorylated at Ser49 (equivalent to Ser221 of STEP61) (2). NMDA-mediated activation of STEP is an important mechanism for regulation of Erk activity in neurons (3). Furthermore, STEP is involved in the regulation of both NMDAR and AMPAR trafficking (4,5). Due to its importance in cognitive function, STEP may play a role in Alzheimer's disease (1).
Alternate Names
FLJ14427; Neural-specific protein-tyrosine phosphatase; protein tyrosine phosphatase non-receptor type 5; protein tyrosine phosphatase, non-receptor type 5 (striatum-enriched); protein-tyrosine phosphatase striatum-enriched; PTN5; PTPN5; PTPSTEP; STEP; STEP61; striatal-enriched protein tyrosine phosphatase; Striatum-enriched protein-tyrosine phosphatase; Tyrosine-protein phosphatase non-receptor type 5
