Linked Life Data

1508145

Source:http://linkedlifedata.com/resource/pubmed/id/1508145

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1992-9-24
pubmed:abstractText
The amount of glutathione S-transferase-2 (GST-2) protein and enzyme activity in a mutant strain (strain GG) of the yellow fever mosquito (Aedes aegypti) is approximately 25-fold higher than in the wild-type (++) strain. The mode of inheritance of the GG phenotype was studied in F1 and backcross progeny using GST enzyme assays, isozyme-specific antisera, and Northern blot analysis. Enzyme assay of parental and F1 progeny showed that the ++ phenotype was dominant to the GG phenotype. This was true for larvae as well as for all tissues examined in adults in both sexes. Immunoblotting experiments showed that, like the ++ strain, F1 larvae and adults express very low levels of GST-2 protein compared with the GG strain. Northern blotting experiments showed that the steady-state levels of GST-2 mRNA in parental and F1 hybrid larvae closely matched the enzyme activity and immunological data. These results suggest the existence of a trans-acting regulatory locus that acts to repress GST-2 mRNA transcription and/or decrease GST-2 mRNA stability in ++ and F1 hybrids. GST enzyme activity in backcross progeny, however, did not segregate into the two distinct phenotypes (low and high) predicted for a single locus, dominant allele model. Backcross progeny expressed a wide range of GST activity and GST-2 protein amount with no apparent fit to simple Mendelian ratios. These backcross data suggest that additional loci are also involved in regulating GST-2 isozyme expression.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0026-8925
pubmed:author
pubmed:issnType
Print
pubmed:volume
234
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
169-76
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Genetic and molecular evidence for a trans-acting regulatory locus controlling glutathione S-transferase-2 expression in Aedes aegypti.
pubmed:affiliation
Department of Environmental Toxicology, University of California, Davis 95616.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't