2ffl

Crystal Structure of Dicer from Giardia intestinalisCrystal Structure of Dicer from Giardia intestinalis

Structural highlights 2ffl is a 4 chain structure with sequence from Giardia intestinalis. The February 2008 RCSB PDB Molecule of the Month feature on Small Interfering RNA by David S. Goodsell is 10.2210/rcsb_pdb/mom_2008_2. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function 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. Publication Abstract from PubMed 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 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

spinqualitylabelsall models 2ffl, resolution 3.33Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image