ROn-1 SINEs: a tRNA-derived, short interspersed repetitive DNA element from Oreochromis niloticus and its species-specific distribution in Old World cichlid fishes.
A SINE-like repetitive element (ROn-1) has been cloned from the tilapiine cichlid fish Oreochromis niloticus. The element is 345 base pairs (bp) in length and consists of a transfer-RNA-like domain with putative RNA polymerase III recognition sequences, a tRNA-unrelated region, and a poly(A) tail. Approximately 6000 copies of ROn-1 occur in the haploid genome of O. niloticus. Southern blot analysis revealed that ROn-1 is an abundant element in the genomes of many African cichlid fishes, but absent from the genome of the Indian cichlid Etroplus.
Bryden
L J
LJ
Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada.
Denovan-Wright
E M
EM
Wright
J M
JM
D000349:Africa; D000818:Animals; D001208:Asia; D001483:Base Sequence; D019143:Evolution, Molecular; D015698:Genomic Library; D008322:Mammals / Q000235:genetics; D008969:Molecular Sequence Data; D009690:Nucleic Acid Conformation; D010473:Perciformes / Q000145:classification / Q000235:genetics*; D012343:RNA, Transfer / Q000235:genetics*; D012091:Repetitive Sequences, Nucleic Acid; D017210:Tilapia / Q000145:classification / Q000235:genetics*
D012343:RNA, Transfer