3lkm

<StructureSection load='3lkm' size='340' side='right' caption='[[3lkm]], [[Resolution|resolution]] 1.60&Aring;' scene=''>

<table><tr><td colspan='2'>[[3lkm]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Dicdi Dicdi]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3LKM OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3LKM FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=AMP:ADENOSINE+MONOPHOSPHATE'>AMP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/[Myosin_heavy-chain]_kinase [Myosin heavy-chain] kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.11.7 2.7.11.7] </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=3lkm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3lkm OCA], [http://pdbe.org/3lkm PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3lkm RCSB], [http://www.ebi.ac.uk/pdbsum/3lkm PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3lkm ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/MHCKA_DICDI MHCKA_DICDI]] Phosphorylates threonine in the C-terminal tail region of myosin II heavy chain. This phosphorylation is critical in regulating the assembly and disassembly of myosin II filament. Requires autophosphorylation for activity.

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== Publication Abstract from PubMed ==

Dictyostelium discoideum myosin II heavy chain kinase A (MHCK A) disrupts the assembly and cellular activity of bipolar filaments of myosin II by phosphorylating sites within its alpha-helical, coiled-coil tail. MHCK A is a member of the atypical alpha-kinase family of serine and threonine protein kinases and displays no sequence homology to typical eukaryotic protein kinases. We report the crystal structure of the alpha-kinase domain (A-CAT) of MHCK A. When crystallized in the presence of adenosine triphosphate (ATP), A-CAT contained adenosine monophosphate (AMP) at the active site. However, when crystallized in the presence of ATP and a peptide substrate, which does not appear in the structure, adenosine diphosphate (ADP) was found at the active site and an invariant aspartic acid residue (Asp(766)) at the active site was phosphorylated. The aspartylphosphate group was exposed to the solvent within an active-site pocket that might function as a docking site for substrates. Access to the aspartylphosphate was regulated by a conformational switch in a loop that bound to a magnesium ion (Mg(2+)), providing a mechanism that allows alpha-kinases to sense and respond to local changes in Mg(2+).

Crystal structure of the alpha-kinase domain of Dictyostelium myosin heavy chain kinase A.,Ye Q, Crawley SW, Yang Y, Cote GP, Jia Z Sci Signal. 2010 Mar 2;3(111):ra17. PMID:20197546<ref>PMID:20197546</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 3lkm" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Dicdi]]

[[Category: Jia, Z]]

[[Category: Ye, Q]]

[[Category: Alpha-kinase]]

[[Category: Wd repeat]]