Abstract：
:Mutation of a CCG sequence in the 5'-untranslated region of the mitochondrially encoded cytochrome b mRNA in Saccharomyces cerevisiae results in destabilization of the message and respiratory deficiency of the mutant strain. This phenotype mimics that of a mutation in the nuclear CBP1 gene. Here it is shown that overexpression of the nuclear CBT1 gene, due to a transposon insertion in the 5'-untranslated region, rescues the respiratory defects resulting from mutating the CCG sequence to ACG. Overexpressing alleles of CBT1 are allelic to soc1, a previously isolated suppressor of cbp1ts-induced temperature sensitivity of respiratory growth. Quantitative primer extension analysis indicated that cbt1 null strains have defects in 5'-end processing of precursor cytochrome b mRNA to the mature form. Cbt1p is also required for stabilizing the mature cytochrome b mRNA after 5' processing.
journal_name
Geneticsjournal_title
Geneticsauthors
Ellis TP,Schonauer MS,Dieckmann CLdoi
10.1534/genetics.104.036467keywords:
subject
Has Abstractpub_date
2005-11-01 00:00:00pages
949-57issue
3eissn
0016-6731issn
1943-2631pii
genetics.104.036467journal_volume
171pub_type
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