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1w2c

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[[Image:1w2c.jpg|left|200px]]<br /><applet load="1w2c" size="350" color="white" frame="true" align="right" spinBox="true"
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[[Image:1w2c.jpg|left|200px]]
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caption="1w2c, resolution 1.95&Aring;" />
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'''HUMAN INOSITOL (1,4,5) TRISPHOSPHATE 3-KINASE COMPLEXED WITH MN2+/AMPPNP/INS(1,4,5)P3'''<br />
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{{Structure
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|PDB= 1w2c |SIZE=350|CAPTION= <scene name='initialview01'>1w2c</scene>, resolution 1.95&Aring;
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|SITE= <scene name='pdbsite=AC1:So4+Binding+Site+For+Chain+B'>AC1</scene>
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|LIGAND= <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ANP:PHOSPHOAMINOPHOSPHONIC+ACID-ADENYLATE+ESTER'>ANP</scene> and <scene name='pdbligand=I3P:D-MYO-INOSITOL-1,4,5-TRIPHOSPHATE'>I3P</scene>
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|ACTIVITY= [http://en.wikipedia.org/wiki/Transferase Transferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.7.127 2.1.7.127]
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|GENE=
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}}
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'''HUMAN INOSITOL (1,4,5) TRISPHOSPHATE 3-KINASE COMPLEXED WITH MN2+/AMPPNP/INS(1,4,5)P3'''
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==Overview==
==Overview==
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==About this Structure==
==About this Structure==
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1W2C is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with <scene name='pdbligand=MN:'>MN</scene>, <scene name='pdbligand=SO4:'>SO4</scene>, <scene name='pdbligand=ANP:'>ANP</scene> and <scene name='pdbligand=I3P:'>I3P</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Transferase Transferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.7.127 2.1.7.127] Known structural/functional Site: <scene name='pdbsite=AC1:So4+Binding+Site+For+Chain+B'>AC1</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1W2C OCA].
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1W2C is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1W2C OCA].
==Reference==
==Reference==
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Structure of a human inositol 1,4,5-trisphosphate 3-kinase: substrate binding reveals why it is not a phosphoinositide 3-kinase., Gonzalez B, Schell MJ, Letcher AJ, Veprintsev DB, Irvine RF, Williams RL, Mol Cell. 2004 Sep 10;15(5):689-701. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15350214 15350214]
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Structure of a human inositol 1,4,5-trisphosphate 3-kinase: substrate binding reveals why it is not a phosphoinositide 3-kinase., Gonzalez B, Schell MJ, Letcher AJ, Veprintsev DB, Irvine RF, Williams RL, Mol Cell. 2004 Sep 10;15(5):689-701. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15350214 15350214]
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Single protein]]
[[Category: Single protein]]
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[[Category: transferase]]
[[Category: transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 15:39:43 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 14:51:09 2008''

Revision as of 12:51, 20 March 2008

Image:1w2c.jpg


PDB ID 1w2c

Drag the structure with the mouse to rotate
, resolution 1.95Å
Sites:
Ligands: , , and
Activity: Transferase, with EC number 2.1.7.127
Coordinates: save as pdb, mmCIF, xml



HUMAN INOSITOL (1,4,5) TRISPHOSPHATE 3-KINASE COMPLEXED WITH MN2+/AMPPNP/INS(1,4,5)P3


Overview

Mammalian cells produce a variety of inositol phosphates (InsPs), including Ins(1,4,5)P3 that serves both as a second messenger and as a substrate for inositol polyphosphate kinases (IPKs), which further phosphorylate it. We report the structure of an IPK, the human Ins(1,4,5)P3 3-kinase-A, both free and in complexes with substrates and products. This enzyme catalyzes transfer of a phosphate from ATP to the 3-OH of Ins(1,4,5)P3, and its X-ray crystal structure provides a template for understanding a broad family of InsP kinases. The catalytic domain consists of three lobes. The N and C lobes bind ATP and resemble protein and lipid kinases, despite insignificant sequence similarity. The third lobe binds inositol phosphate and is a unique four-helix insertion in the C lobe. This lobe embraces all of the phosphates of Ins(1,4,5)P3 in a positively charged pocket, explaining the enzyme's substrate specificity and its inability to phosphorylate PtdIns(4,5)P2, the membrane-resident analog of Ins(1,4,5)P3.

About this Structure

1W2C is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Structure of a human inositol 1,4,5-trisphosphate 3-kinase: substrate binding reveals why it is not a phosphoinositide 3-kinase., Gonzalez B, Schell MJ, Letcher AJ, Veprintsev DB, Irvine RF, Williams RL, Mol Cell. 2004 Sep 10;15(5):689-701. PMID:15350214

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