1lmv
From Proteopedia
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|PDB= 1lmv |SIZE=350|CAPTION= <scene name='initialview01'>1lmv</scene> | |PDB= 1lmv |SIZE=350|CAPTION= <scene name='initialview01'>1lmv</scene> | ||
|SITE= | |SITE= | ||
| - | |LIGAND= | + | |LIGAND= <scene name='pdbligand=A:ADENOSINE-5'-MONOPHOSPHATE'>A</scene>, <scene name='pdbligand=C:CYTIDINE-5'-MONOPHOSPHATE'>C</scene>, <scene name='pdbligand=G:GUANOSINE-5'-MONOPHOSPHATE'>G</scene>, <scene name='pdbligand=U:URIDINE-5'-MONOPHOSPHATE'>U</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1lpw|1LPW]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1lmv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lmv OCA], [http://www.ebi.ac.uk/pdbsum/1lmv PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1lmv RCSB]</span> | ||
}} | }} | ||
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[[Category: u2 snrna]] | [[Category: u2 snrna]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 22:04:46 2008'' |
Revision as of 19:04, 30 March 2008
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| Ligands: | , , , | ||||||
| Related: | 1LPW
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Solution structure of the unmodified U2 snRNA-intron branch site helix from S. cerevisiae
Overview
Pairing of a consensus sequence of the precursor (pre)-mRNA intron with a short region of the U2 small nuclear (sn)RNA during assembly of the eukaryotic spliceosome results in formation of a complementary helix of seven base pairs with a single unpaired adenosine residue. The 2' OH of this adenosine, called the branch site, brings about nucleophilic attack at the pre-mRNA 5' splice site in the first step of splicing. Another feature of this pairing is the phylogenetic conservation of a pseudouridine (psi) residue in U2 snRNA nearly opposite the branch site. We show that the presence of this psi in the pre-mRNA branch-site helix of Saccharomyces cerevisiae induces a dramatically altered architectural landscape compared with that of its unmodified counterpart. The psi-induced structure places the nucleophile in an accessible position for the first step of splicing.
About this Structure
1LMV is a Protein complex structure of sequences from Saccharomyces cerevisiae. Full crystallographic information is available from OCA.
Reference
Sculpting of the spliceosomal branch site recognition motif by a conserved pseudouridine., Newby MI, Greenbaum NL, Nat Struct Biol. 2002 Dec;9(12):958-65. PMID:12426583
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