Suppression of BCR-ABL mRNA by various ribozymes in HeLa cells.
Ribozymes are RNA molecules with enzymatic activity that can cleave target RNA molecules in a sequence specific manner. To date, various types of ribozyme have been constructed to cleave other RNAs and such trans-acting ribozymes include hammerhead, hairpin and HDV ribozymes. External guide sequence (EGS) can also induce the suppression of a gene-expression by taking advantage of cellular RNase P. Here we compared the activities of various functional RNA cleavers both in vitro and in vivo. The first purpose of this comparison was intended to determine the best ribozyme motif with the highest activity in cells. The second purpose is to know the correlation between the activities of ribozymes in vitro and in vivo. Our results indicated that the intrinsic cleavage activity of ribozymes is not the sole determinant that is responsible for the activity of a ribozyme in cultured cells.
Kato
Y
Y
Department of Chemistry and Biotechnology, Graduate School of Engineering, University of Tokyo, 7-3-1 Hongo, Tokyo 113-8656, Japan.
Kuwabara
T
T
Toda
H
H
Warashina
M
M
Taira
K
K
D004722:Endoribonucleases / Q000378:metabolism; D016313:Genes, abl; D006367:HeLa Cells; D006801:Humans; D066298:In Vitro Techniques; D009690:Nucleic Acid Conformation; D011401:Promoter Regions, Genetic; D016337:RNA, Catalytic / Q000737:chemistry / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics* / Q000378:metabolism*; D043262:Ribonuclease P; D013489:Suppression, Genetic
D016337:RNA, Catalytic; D012333:RNA, Messenger; D004722:Endoribonucleases; C468368:RPP14 protein, human; D043262:Ribonuclease P