1f7j | pdb_00001f7j

PL.LSU/2 GROUPII INTRON

spinqualitylabelsall models 1f7j Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, PDBsum Publication Abstract from PubMed We have used chemical footprinting, kinetic dissection of reactions and comparative sequence analysis to show that in self-splicing introns belonging to subgroup IIB, the sites that bind the 5' and 3' exons are connected to one another by tertiary interactions. This unanticipated arrangement, which contrasts with the direct covalent linkage that prevails in the other major subdivision of group II (subgroup IIA), results in a unique three-dimensional architecture for the complex between the exons, their binding sites and intron domain V. A key feature of the modeled complex is the presence of several close contacts between domain V and one of the intron-exon pairings. These contacts, whose existence is supported by hydroxyl radical footprinting, provide a structural framework for the known role of domain V in catalysis and its recently demonstrated involvement in binding of the 5' exon. A three-dimensional perspective on exon binding by a group II self-splicing intron.,Costa M, Michel F, Westhof E EMBO J. 2000 Sep 15;19(18):5007-18. PMID:10990464 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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