Linked Life Data

1423631

Source:http://linkedlifedata.com/resource/pubmed/id/1423631

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1992-12-23
pubmed:abstractText
Prior to the chemical steps of mRNA splicing, the extensive base-pairing interaction between the U4 and U6 spliceosomal snRNAs is disrupted. Here, we use a mutational analysis in yeast to demonstrate a conserved base-pairing interaction between the U6 and U2 snRNAs that is mutually exclusive with the U4-U6 interaction. In this novel pairing, conserved sequences in U6 interact with a sequence in U2 that is immediately upstream of the branch point recognition region. Remarkably, the residues in U6 that can be consequently juxtaposed with the intron substrate include those that have been proposed previously to be catalytic. Both the first and second steps of splicing are inhibited when this base-paired structure is mutated. These observations, together with the high conservation of the U2-U6 structure, lead us to propose that it might be a component of the spliceosomal active site.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0092-8674
pubmed:author
pubmed:issnType
Print
pubmed:day
27
pubmed:volume
71
pubmed:geneSymbol
RP51A, SNR17B, SNR7
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
803-17
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
A novel base-pairing interaction between U2 and U6 snRNAs suggests a mechanism for the catalytic activation of the spliceosome.
pubmed:affiliation
Department of Biochemistry and Biophysics, University of California, San Francisco 94143.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't