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==Crystal Structure of Dicer from Giardia intestinalis==
==Crystal Structure of Dicer from Giardia intestinalis==
<StructureSection load='2ffl' size='340' side='right' caption='[[2ffl]], [[Resolution|resolution]] 3.33&Aring;' scene=''>
<StructureSection load='2ffl' size='340' side='right'caption='[[2ffl]], [[Resolution|resolution]] 3.33&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[2ffl]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Giain Giain]. The February 2008 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Small Interfering RNA''  by David S. Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2008_2 10.2210/rcsb_pdb/mom_2008_2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2FFL OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2FFL FirstGlance]. <br>
<table><tr><td colspan='2'>[[2ffl]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Giardia_intestinalis Giardia intestinalis]. The February 2008 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Small Interfering RNA''  by David S. Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2008_2 10.2210/rcsb_pdb/mom_2008_2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2FFL OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2FFL FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.33&#8491;</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Ribonuclease_III Ribonuclease III], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.26.3 3.1.26.3] </span></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene></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=2ffl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ffl OCA], [http://pdbe.org/2ffl PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2ffl RCSB], [http://www.ebi.ac.uk/pdbsum/2ffl PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2ffl ProSAT]</span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2ffl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ffl OCA], [https://pdbe.org/2ffl PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ffl RCSB], [https://www.ebi.ac.uk/pdbsum/2ffl PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ffl ProSAT]</span></td></tr>
</table>
</table>
<div style="background-color:#fffaf0;">
== Function ==
== Publication Abstract from PubMed ==
[https://www.uniprot.org/uniprot/DCL_GIAIC DCL_GIAIC] Involved in cleaving double-stranded RNA in the RNA interference (RNAi) pathway. It produces 21 to 23 bp dsRNAs (siRNAs) which target the selective destruction of homologous RNAs.<ref>PMID:16410517</ref>  
The specialized ribonuclease Dicer initiates RNA interference by cleaving double-stranded RNA (dsRNA) substrates into small fragments about 25 nucleotides in length. In the crystal structure of an intact Dicer enzyme, the PAZ domain, a module that binds the end of dsRNA, is separated from the two catalytic ribonuclease III (RNase III) domains by a flat, positively charged surface. The 65 angstrom distance between the PAZ and RNase III domains matches the length spanned by 25 base pairs of RNA. Thus, Dicer itself is a molecular ruler that recognizes dsRNA and cleaves a specified distance from the helical end.
 
Structural basis for double-stranded RNA processing by Dicer.,Macrae IJ, Zhou K, Li F, Repic A, Brooks AN, Cande WZ, Adams PD, Doudna JA Science. 2006 Jan 13;311(5758):195-8. PMID:16410517<ref>PMID:16410517</ref>
 
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 2ffl" style="background-color:#fffaf0;"></div>
 
==See Also==
*[[Dicer|Dicer]]
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Giain]]
[[Category: Giardia intestinalis]]
[[Category: Large Structures]]
[[Category: RCSB PDB Molecule of the Month]]
[[Category: RCSB PDB Molecule of the Month]]
[[Category: Ribonuclease III]]
[[Category: Small Interfering RNA]]
[[Category: Small Interfering RNA]]
[[Category: Adams, P D]]
[[Category: Adams PD]]
[[Category: Doudna, J A]]
[[Category: Doudna JA]]
[[Category: MacRae, I J]]
[[Category: MacRae IJ]]
[[Category: Hydrolase]]
[[Category: Paz domain]]
[[Category: Rna interference]]
[[Category: Rnai]]
[[Category: Translation]]

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