Linked Life Data

7489492

Source:http://linkedlifedata.com/resource/pubmed/id/7489492

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1996-1-2
pubmed:abstractText
The gene for the maturation (A) protein of the single-stranded RNA coliphage MS2 is preceded by an untranslated leader of 130 nt. Secondary structure of the leader was deduced by phylogenetic comparison and by probing with enzymes and chemicals. The RNA folds into a cloverleaf, i.e., three stem-loop structures enclosed by a long-distance interaction (LDI). This LDI is essential for translational control. Its 3'moiety contains the Shine-Dalgarno region of the A-protein gene, whereas its complement is located 80 nt upstream, i.e., about 30 nt from the 5'-terminus of the RNA chain. Mutational analysis shows that this base pairing represses expression of the A-protein gene. We present a model in which translational starts can only take place on nonequilibrated RNA, in which base pairing between the complementary regions has not yet taken place. We suggest that this pairing is kinetically delayed by the intervening sequence, which contains the three hairpins of the cloverleaf. The model is mainly based on the observation that reducing the length of the intervening sequence reduces expression, whereas increasing the length has the opposite effect. In addition, further stabilization of the LDI by a stronger base pair does not lead to a decrease in A-protein synthesis. Such a decrease is predicted to occur if translation would be controlled by the equilibrium structure of the leader RNA. These and other observations fit a kinetic model of translational control by RNA folding.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
1355-8382
pubmed:author
pubmed:issnType
Print
pubmed:volume
1
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
79-88
pubmed:dateRevised
2008-11-20
pubmed:meshHeading
pubmed:year
1995
pubmed:articleTitle
Translational control of maturation-protein synthesis in phage MS2: a role for the kinetics of RNA folding?
pubmed:affiliation
Leiden Institute of Chemistry, Department of Biochemistry, Gorlaeus Laboratories, University of Leiden, The Netherlands.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't