4oi0: Difference between revisions

==Structure of a RNA-processing protein==

<StructureSection load='4oi0' size='340' side='right' caption='[[4oi0]], [[Resolution|resolution]] 2.20&Aring;' scene=''>

<table><tr><td colspan='2'>[[4oi0]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4OI0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4OI0 FirstGlance]. <br>

</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=2PE:NONAETHYLENE+GLYCOL'>2PE</scene>, <scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=ALF:TETRAFLUOROALUMINATE+ION'>ALF</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SAR:SARCOSINE'>SAR</scene><br>

<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4ohv|4ohv]], [[4ohw|4ohw]], [[4ohx|4ohx]], [[4ohy|4ohy]], [[4ohz|4ohz]], [[4oi1|4oi1]], [[4oi2|4oi2]]</td></tr>

<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4oi0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4oi0 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4oi0 RCSB], [http://www.ebi.ac.uk/pdbsum/4oi0 PDBsum]</span></td></tr>

<table>

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== Publication Abstract from PubMed ==

RNA-specific polynucleotide kinases of the Clp1 subfamily are key components of various RNA maturation pathways. However, the structural basis explaining their substrate specificity and the enzymatic mechanism is elusive. Here, we report crystal structures of Clp1 from Caenorhabditis elegans (ceClp1) in a number of nucleotide- and RNA-bound states along the reaction pathway. The combined structural and biochemical analysis of ceClp1 elucidates the RNA specificity and lets us derive a general model for enzyme catalysis of RNA-specific polynucleotide kinases. We identified an RNA binding motif referred to as "clasp" as well as a conformational switch that involves the essential Walker A lysine (Lys127) and regulates the enzymatic activity of ceClp1. Structural comparison with other P loop proteins, such as kinases, adenosine triphosphatases (ATPases), and guanosine triphosphatases (GTPases), suggests that the observed conformational switch of the Walker A lysine is a broadly relevant mechanistic feature.

 

RNA specificity and regulation of catalysis in the eukaryotic polynucleotide kinase clp1.,Dikfidan A, Loll B, Zeymer C, Magler I, Clausen T, Meinhart A Mol Cell. 2014 Jun 19;54(6):975-86. doi: 10.1016/j.molcel.2014.04.005. Epub 2014 , May 8. PMID:24813946<ref>PMID:24813946</ref>

 

[[Category: Clausen, T.]]

[[Category: Dikfidan, A.]]

[[Category: Loll, B.]]

[[Category: Meinhart, A.]]

[[Category: Zeymer, C.]]

[[Category: Polynucleotide kinase]]

[[Category: Rna binding protein-rna complex]]