Did you know ? If you order before Friday 14h we deliver 90PCT of the the time next Tuesday, Gentaur another in time delivery
Publication Date : //
Conversion of tRNA precursors to their mature forms requires the action of both endo- and exoribonucleases. Although studies over many years identified the endoribonuclease, RNase P, and several exoribonucleases as the enzymes responsible for generating the mature 5' and 3' termini, respectively, of Escherichia coli tRNAs, relatively little is known about how tRNAs are separated from long multimeric or multifunction transcripts, or from long leader and trailer sequences. To examine this question, the tRNA products that accumulate in mutant strains devoid of multiple exoribonucleases plus one or several endoribonucleases were analyzed by northern analysis. We find that the multifunction tyrT transcript, which contains two tRNA(Tyr)1 sequences separated by a 209-nt spacer region plus a downstream mRNA, is cleaved at three sites in the spacer region by the endoribonuclease, RNase E. When both RNase E and RNase P are absent, a product containing both tRNAs accumulates. Two multimeric tRNA transcripts, those for tRNA Arg-His-Leu-Pro and tRNA Gly-Cys-Leu also require RNase E for maturation. For the former transcript, products with long 3' extensions on tRNA(Arg), tRNA(His), and tRNA(Pro), as well as the primary transcript, accumulate in the absence of RNase E. For the latter transcript, RNase E cleaves downstream of each tRNA. Little processing of either multimeric transcript occurs in the absence of both RNase E and RNase P. These data indicate that RNase E is a major contributor to the initial processing of E. coli tRNA transcripts, providing substrates for final maturation by RNase P and the 3' exoribonucleases. Based on this new information, a detailed model for tRNA maturation is proposed.
Authors : Li Zhongwei , Deutscher Murray P ,
Related products :
52062 Aachen Deutschland
Support Karolina Elandt
Tel: +49 0241 40 08 90 86, +49 0241 95 78 94 78, +49 0241 40 08 90 86
Fax: (+49) 241 56 00 47 88
Logistic :0241 40 08 90 86
IBAN lautet DE8839050000107569353
Handelsregister Aachen HR B 16058
Umsatzsteuer-Identifikationsnummer *** DE 815175831
[email protected] | Gentaur | Gentaur
Genprice Inc, Logistics
547, Yurok Circle
San Jose, CA 95123
Tel (408) 780-0908,
Fax (408) 780-0908,
Genprice Inc, Invoices and accounting
6017 Snell Ave, Ste 357
San Jose, CA 95123
Canada Montreal +15149077481
Ceská republika Praha +420246019719
Finland Helsset +358942419041
Magyarország Budapest +3619980547
US New York+17185132983
WP2272: Pathogenic Escherichia coli infection
WP1938: tRNA Aminoacylation
WP433: tRNA Synthetases
WP1620: Aminoacyl-tRNA biosynthesis
WP106: Alanine and aspartate metabolism
WP219: Cytoplasmic tRNA Synthetases
WP62: Mitochondrial tRNA Synthetases
Related Genes :
 RNase Z in Escherichia coli plays a significant role in mRNA decay.
 A decreased level of FtsZ is responsible for inviability of RNase E-deficient cells.
 The function of RNase G in Escherichia coli is constrained by its amino and carboxyl termini.
 RNase E plays an essential role in the maturation of Escherichia coli tRNA precursors.
Enter catalog number :