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Characterization of the substrate specificity of the inositol 5-phosphatase SHIP1. | LitMetric

Characterization of the substrate specificity of the inositol 5-phosphatase SHIP1.

Biochem Biophys Res Commun

Institute of Biochemistry and Signal Transduction, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany. Electronic address:

Published: April 2020

AI Article Synopsis

Article Abstract

SHIP1 is an inositol 5-phosphatase which is well established for its tumour suppressor potential in leukaemia. Enzymatically, two SHIP1 substrates, PtdIns(3,4,5)P and Ins(1,3,4,5)P have been identified to date. Additional substrates were found for the homologue SHIP2. In this study, we identified new inositol phosphate (InsP) substrates of SHIP1 by metal dye detection high-performance liquid chromatography and compared the substrate profiles of SHIP1 and SHIP2. We were able to verify Ins(1,3,4,5)P as a substrate of SHIP1 and interestingly found Ins(1,2,3,4,5)P and Ins(2,3,4,5)P to be preferably used as substrates and Ins(1,4,5,6)P and Ins(2,4,5,6)P to be weak substrates. All of those except Ins(2,3,4,5)P are also known substrates of SHIP2 indicating a possible exclusive role of Ins(2,3,4,5)P hydrolysis for SHIP1 but not SHIP2 function.

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Source
http://dx.doi.org/10.1016/j.bbrc.2020.01.012DOI Listing

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