1i9z

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{{STRUCTURE_1i9z| PDB=1i9z | SCENE= }}
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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'''
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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===
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==Overview==
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Inositol polyphosphate 5-phosphatases are central to intracellular processes ranging from membrane trafficking to Ca(2+) signaling, and defects in this activity result in the human disease Lowe syndrome. The 1.8 resolution structure of the inositol polyphosphate 5-phosphatase domain of SPsynaptojanin bound to Ca(2+) and inositol (1,4)-bisphosphate reveals a fold and an active site His and Asp pair resembling those of several Mg(2+)-dependent nucleases. Additional loops mediate specific inositol polyphosphate contacts. The 4-phosphate of inositol (1,4)-bisphosphate is misoriented by 4.6 compared to the reactive geometry observed in the apurinic/apyrimidinic endonuclease 1, explaining the dephosphorylation site selectivity of the 5-phosphatases. Based on the structure, a series of mutants are described that exhibit altered substrate specificity providing general determinants for substrate recognition.
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(as it appears on PubMed at http://www.pubmed.gov), where 11348594 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11348594}}
==About this Structure==
==About this Structure==
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[[Category: Ipp5c]]
[[Category: Ipp5c]]
[[Category: Spsynaptojanin]]
[[Category: Spsynaptojanin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 10:38:45 2008''

Revision as of 07:38, 1 July 2008

Image:1i9z.png

Template:STRUCTURE 1i9z

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

Template:ABSTRACT PUBMED 11348594

About this Structure

1I9Z is a Single protein structure of sequence from Schizosaccharomyces pombe. Full crystallographic information is available from OCA.

Reference

Specificity determinants in phosphoinositide dephosphorylation: crystal structure of an archetypal inositol polyphosphate 5-phosphatase., Tsujishita Y, Guo S, Stolz LE, York JD, Hurley JH, Cell. 2001 May 4;105(3):379-89. PMID:11348594

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