Linked Life Data

8623553

Source:http://linkedlifedata.com/resource/pubmed/id/8623553

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1996-6-19
pubmed:abstractText
Potato spindle tuber viroid (PSTVd) is believed to undergo a series of specific structural transitions during replication. The variable domain of PSTVd is known to contain sequences that are important for replication/accumulation as well as one of three "premelting regions" which control breakdown of the native structure in vitro. We have examined the structural and biological effects of five single and two double nucleotide substitutions within premelting region 3 in an effort to isolate temperature-sensitive mutations affecting PSTVd replication or pathogenesis. None of these mutants replicated as rapidly as the wild type, and a variety of spontaneous sequence changes were detected in their progeny. Higher temperatures were able to partially overcome the inhibition of replication associated with a more stable secondary structure, but no well-defined temperature-sensitive PSTVd mutants were identified. Selective pressures arising from the interaction of assay temperature and structural stability in vivo appear capable of moving PSTVd populations between peaks of relatively high fitness. Depending on the exact nature and location of the mutation, selection may occur at the level of either the plus or the minus strand.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0042-6822
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
219
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
45-56
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Role of the variable domain in modulating potato spindle tuber viroid replication.
pubmed:affiliation
Department of Plant Biology, University of Maryland, College Park 20742, USA.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't