1i9z

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CRYSTAL STRUCTURE OF INOSITOL POLYPHOSPHATE 5-PHOSPHATASE DOMAIN (IPP5C) OF SPSYNAPTOJANIN IN COMPLEX WITH INOSITOL (1,4)-BISPHOSPHATE AND CALCIUM ION

Structural highlights

1i9z is a 1 chain structure with sequence from Schizosaccharomyces pombe. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.8Å
Ligands:2IP, CA
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

SYJ1_SCHPO Controls the cellular levels and subcellular distribution of phosphatidylinositol 3-phosphate and phosphatidylinositol 4,5-bisphosphate. Involved in distinct membrane trafficking and signal transduction pathways. Highly active against a range of soluble and lipid inositol phosphates. Active in dephosphorylating the 5-position of Ins(1,4,5)P3 and Ins(1,3,4,5)P4 and to a lesser extent Ins(1,4,5,6)P4. The enzyme is also active against PI(4,5)P2 presented in sonicated vesicles and Triton mixed micelles, and somewhat less active against PI(3,5)P2 in unilamellar vesicles. Activity against PI(3,5)P2 drops sharply when this substrate is presented in mixed micelles. Also hydrolyzes PIP3 to produce PI(3,4)P2.[1]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

References

  1. ↑ Chi Y, Zhou B, Wang WQ, Chung SK, Kwon YU, Ahn YH, Chang YT, Tsujishita Y, Hurley JH, Zhang ZY. Comparative mechanistic and substrate specificity study of inositol polyphosphate 5-phosphatase Schizosaccharomyces pombe Synaptojanin and SHIP2. J Biol Chem. 2004 Oct 22;279(43):44987-95. Epub 2004 Aug 16. PMID:15316017 doi:http://dx.doi.org/10.1074/jbc.M406416200

Contents


PDB ID 1i9z

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