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4hne

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Revision as of 14:06, 4 August 2016

Crystal structure of the catalytic domain of human type II alpha Phosphatidylinositol 4-kinase (PI4KIIalpha) in complex with ADP

Structural highlights

4hne is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	4hnd
Gene:	PI4K2A, PI4KIIA (AMINO ACIDS 78-453) (HUMAN)
Activity:	1-phosphatidylinositol 4-kinase, with EC number 2.7.1.67
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[P4K2A_HUMAN] Together with PI4K2B and the type III PI4Ks (PIK4CA and PIK4CB) it contributes to the overall PI4-kinase activity of the cell. The phosphorylation of phosphatidylinositol (PI) to PI4P is the first committed step in the generation of phosphatidylinositol 4,5-bisphosphate (PIP2), a precursor of the second messenger inositol 1,4,5-trisphosphate (InsP3). Contributes to the production of InsP3 in stimulated cells (By similarity). This lipid kinase is the major phosphatidylinositol 4-phosphate (PI4P) producer in the Golgi apparatus, it generates more than 50% of this molecule which is essential for the identity of the organelle, protein sorting and membrane trafficking.

Publication Abstract from PubMed

Phosphatidylinositol 4-kinase IIalpha (PI4KIIalpha), a membrane-associated PI kinase, plays a central role in cell signalling and trafficking. Its kinase activity critically depends on palmitoylation of its cysteine-rich motif (-CCPCC-) and is modulated by the membrane environment. Lack of atomic structure impairs our understanding of the mechanism regulating kinase activity. Here we present the crystal structure of human PI4KIIalpha in ADP-bound form. The structure identifies the nucleotide-binding pocket that differs notably from that found in PI3Ks. Two structural insertions, a palmitoylation insertion and an RK-rich insertion, endow PI4KIIalpha with the 'integral' membrane-binding feature. Molecular dynamics simulations, biochemical and mutagenesis studies reveal that the palmitoylation insertion, containing an amphipathic helix, contributes to the PI-binding pocket and anchors PI4KIIalpha to the membrane, suggesting that fluctuation of the palmitoylation insertion affects PI4KIIalpha's activity. We conclude from our results that PI4KIIalpha's activity is regulated indirectly through changes in the membrane environment.

Molecular insights into the membrane-associated phosphatidylinositol 4-kinase IIalpha.,Zhou Q, Li J, Yu H, Zhai Y, Gao Z, Liu Y, Pang X, Zhang L, Schulten K, Sun F, Chen C Nat Commun. 2014 Mar 28;5:3552. doi: 10.1038/ncomms4552. PMID:24675427^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Zhou Q, Li J, Yu H, Zhai Y, Gao Z, Liu Y, Pang X, Zhang L, Schulten K, Sun F, Chen C. Molecular insights into the membrane-associated phosphatidylinositol 4-kinase IIalpha. Nat Commun. 2014 Mar 28;5:3552. doi: 10.1038/ncomms4552. PMID:24675427 doi:http://dx.doi.org/10.1038/ncomms4552

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4hne"

@@ Line 1: / Line 1: @@
 ==Crystal structure of the catalytic domain of human type II alpha Phosphatidylinositol 4-kinase (PI4KIIalpha) in complex with ADP==
 <StructureSection load='4hne' size='340' side='right' caption='[[4hne]], [[Resolution|resolution]] 2.95&Aring;' scene=''>
@@ Line 7: / Line 8: @@
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PI4K2A, PI4KIIA (AMINO ACIDS 78-453) ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/1-phosphatidylinositol_4-kinase 1-phosphatidylinositol 4-kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.67 2.7.1.67] </span></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4hne FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4hne OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4hne RCSB], [http://www.ebi.ac.uk/pdbsum/4hne PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4hne FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4hne OCA], [http://pdbe.org/4hne PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4hne RCSB], [http://www.ebi.ac.uk/pdbsum/4hne PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4hne ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 19: / Line 20: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4hne" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>

4hne

From Proteopedia

Revision as of 14:06, 4 August 2016

Crystal structure of the catalytic domain of human type II alpha Phosphatidylinositol 4-kinase (PI4KIIalpha) in complex with ADP

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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