Protein tyrosine phosphatases (EC 3.1.3.48, systematic name protein-tyrosine-phosphate phosphohydrolase) are a group of enzymes that remove phosphate groups from phosphorylated tyrosine residues on proteins: [a protein]-tyrosine phosphate + H2O = [a protein]-tyrosine + phosphate Protein … See more Together with tyrosine kinases, PTPs regulate the phosphorylation state of many important signalling molecules, such as the MAP kinase family. PTPs are increasingly viewed as integral components of signal transduction cascades, … See more Individual PTPs may be expressed by all cell types, or their expression may be strictly tissue-specific. Most cells express 30% to 60% of all the PTPs, however hematopoietic See more • This article incorporates text from the public domain Pfam and InterPro: IPR000106 See more By mechanism PTP activity can be found in four protein families. Links to all 107 members of the protein tyrosine phosphatase family can be found in the template at the bottom of this article. Class I See more • PTP Summary and Relevant Publications at Monash University • Protein-Tyrosine-Phosphatase at the U.S. National Library of Medicine See more WebMar 1, 1994 · Protein phosphotyrosine phosphatase purified from the particulate fraction of human placenta dephosphorylates insulin and growth-factor receptors. Biochem J. 1988 Dec 1; 256 (2):493–500. [Europe PMC free article] [Google Scholar] Gruppuso PA, Boylan JM, Posner BI, Faure R, Brautigan DL. Hepatic protein phosphotyrosine phosphatase.

DEVELOPMENT OF QUANTITATIVE PROTEOMIC STRATEGIES TO …

WebAlan Cheng, Michel L. Tremblay, in Handbook of Cell Signaling, 2003. PTP1B as a Bona Fide IR Phosphatase. PTP1B is the prototype for the superfamily of PTPs and was initially thought to indiscriminately dephosphorylate phosphorylated tyrosine residues (a housekeeping function) [4].Although it is widely expressed in most cell types, it is one of … WebApr 1, 1987 · Abstract. A unique phosphatase that selectively hydrolyzed phosphotyrosine and 2′-AMP at alkaline pH and pp-nitrophenylphosphate, 3′-AMP, 2′-GMP, and 3′-GMP; the ratio of its activities with these substrates was 100: 96: 115: 68: 39: 25: 16. Its K m values for L-phosphotyrosine, 2′-AMP, and p-nitrophenylphosphate were 0.8 × 10 −4 M ... tts microcell

The tumor suppressor role of Src homology phosphotyrosine …

WebJun 15, 2006 · VE-PTP is the first known receptor-type phosphotyrosine phosphatase that is restricted to endothelial cells. This was first shown by in situ hybridization analysis of … WebAug 18, 1994 · Here we describe the crystal structure of a low-molecular-weight phosphotyrosine protein phosphatase (PTPase) 2, a cytosolic phosphatase present in many mammalian cells. The enzyme catalyses the ... WebSHP-1 is thought to dephosphorylate tyrosines in from Upstate. Phosphotyrosine clone PY-20 (610000) antibody was ITAMs [10] protein tyrosine kinases and/or adapter proteins purchased from Becton-Dickinson (BD Bioscience, Alphen aan such as SLP-76 [11] whose phosphorylation is critical for den Rijn, The Netherlands). activation signals ... tts mid city suva