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Differential expression of individual gene copies from within a tRNA multigene family in the mulberry silkworm Bombyx mori
Author(s) -
Srinivasan L.,
Gopinathan K. P.
Publication year - 2001
Publication title -
insect molecular biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.955
H-Index - 93
eISSN - 1365-2583
pISSN - 0962-1075
DOI - 10.1046/j.0962-1075.2001.00287.x
Subject(s) - bombyx mori , biology , gene , reporter gene , genetics , microbiology and biotechnology , gene family , bombyx , gene expression
In mulberry silkworm Bombyx mori , tRNA 1 Gly constitutes a multigene family from which the individual members are transcribed at different levels in vitro in homologous nuclear extracts. We report here the quantification of functional transcripts of these gene copies in vivo in B. mori ‐derived BmN cells based on a suppression assay. The gene copies were converted to encode suppressor tRNAs and co‐transfected into cell lines with reporter gene(s) harbouring one or more nonsense mutations and the reporter gene activity was quantified. Individual members of the gene family were transcribed to very high‐, medium‐ and very low‐levels, following the same pattern as in vitro . All these gene copies were maximally expressed in Bm cells as compared to other insect cell lines.