BC1 RNA, the transcript from a master gene for ID element amplification, is able to prime its own reverse transcription.
ID elements are short interspersed elements (SINEs) found in high copy number in many rodent genomes. BC1 RNA, an ID-related transcript, is derived from the single copy BC1 RNA gene. The BC1 RNA gene has been shown to be a master gene for ID element amplification in rodent genomes. ID elements are dispersed through a process termed retroposition. The retroposition process involves a number of potential regulatory steps. These regulatory steps may include transcription in the appropriate tissue, transcript stability, priming of the RNA transcript for reverse transcription and integration. This study focuses on priming of the RNA transcript for reverse transcription. BC1 RNA gene transcripts are shown to be able to prime their own reverse transcription in an efficient intramolecular and site-specific fashion. This self-priming ability is a consequence of the secondary structure of the 3'-unique region. The observation that a gene actively amplified throughout rodent evolution makes a RNA capable of efficient self-primed reverse transcription strongly suggests that self-priming is at least one feature establishing the BC1 RNA gene as a master gene for amplification of ID elements.
Shen
M R
MR
Department of Biochemistry and Molecular Biology, Neuroscience Center of Excellence, Stanley S.Scott Cancer Center, Louisiana State University Medical Center, 1901 Perdido Street, New Orleans, LA 70112, USA. shen3@llnl.gov
Brosius
J
J
Deininger
P L
PL
D000818:Animals; D001483:Base Sequence; D015139:Blotting, Southern; D017931:DNA Primers; D004268:DNA-Binding Proteins / Q000096:biosynthesis* / Q000235:genetics; D016678:Genome; D007700:Kinetics; D008969:Molecular Sequence Data; D009690:Nucleic Acid Conformation; D016133:Polymerase Chain Reaction; D012194:RNA-Directed DNA Polymerase; D011994:Recombinant Proteins / Q000096:biosynthesis; D012261:Ribonucleoproteins / Q000096:biosynthesis* / Q000235:genetics; D020736:Ribonucleoproteins, Small Cytoplasmic; D012377:Rodentia; D014158:Transcription, Genetic
D017931:DNA Primers; D004268:DNA-Binding Proteins; D011994:Recombinant Proteins; D012261:Ribonucleoproteins; D020736:Ribonucleoproteins, Small Cytoplasmic; D012194:RNA-Directed DNA Polymerase