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Nucleic Acids Research, 1977, Vol. 4, No. 7 2191-2204
© 1977

Articles

Chromatographic behavior of several mammalian tRNAs on acylated dihydroxyl-borate cellulose and Aminex A-28

Bruce A. Roe, Ann F. Stankiewicz and Christina Y. Chen

Department of Chemistry, Kent State University Kent, OH 44242. USA

Received March 29, 1977. Studies of the chromatographic behavior of mammalian tRNAs from several sources, on acylated DBAE-cellulose indicate that species of tRNAASn, tRNAASP and tRNAHis can be retained on this matrix, while species of tRNATyr, tRNAAsn and tRNAAsp are not retained. Treatment of total rat liver tRNA with cyanogen bromide and subsequent chromatography on Aminex A-28 columns demonstrated that these tRNA species might contain Q (or Q*) nucleoside. However, comparable studies of the tRNA isolated from Walker 256 rat mammary tumor tissue demonstrated that this tumor tRNA almost totally lacks the hypermodified nucleosides Q and Q*. In addition, we have found that at least the major species of rat liver tRNAASn contains the Q nucleoside.

These studies indicate that chromatography on the acylated DBAE-cellulose matrix, coupled with the analytical ion-exchange chromatography of cyanogen bromide treated and untreated amino-acyl-tRNA can be a valuable technique for the determination of alterations in the Q (or Q*) nucleoside content of the tRNAs isolated from normal and tumor tissues.


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