Jan 1, 1995

Characterization of a novel transcript of retroviral origin expressed in rat heart and liver

Journal of Molecular and Cellular Cardiology
X J MartinK R Boheler

Abstract

Eleven cDNA clones of retroviral origin (SORO) have been isolated and characterized from a rat cardiac cDNA library that are highly homologous to the RAL-element family of rat retroviral endogenous sequences. SORO-1, the largest of the clones isolated at approximately 3.5 kb, contains a characteristic long terminal repeat (LTR) that is unique to previously identified retroposons. Its LTR contains elements homologous to the CAAT box, a TATA box, a core enhancer sequence, and potential binding sites for GATA. SORO-1 hybridizes to a mRNA of approximately 7 kb, that is present both in rat heart and liver. This transcript was not, however, detected in other tissues (fast and slow skeletal muscles, brain, kidney, testis, lung, intestine, spleen) or from any other species (man, monkey, mouse, dog, rabbit, chicken, cow, yeast) examined. During postnatal cardiac development, the expression of the transcript appears to be down-regulated and is present at levels 10-fold greater in neonates than in adults. The function of this retroposon that is expressed in rat heart and liver has not yet been determined, but the sequence analysis of its LTR and its expression pattern suggest that it may be regulated by specific trans-acting factors that ...Continue Reading

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Mentioned in this Paper

Benign Neoplasm of Testis
Lung
Spleen
Long Terminal Repeat
Neoplasm of Uncertain or Unknown Behavior of Testis
Transcription, Genetic
August Rats
Tissue Specificity
Selfish DNA
Myocardium

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