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- W1578070377 abstract "Abstract 3-Deazaguanosine containing a 14C label in the ribose moiety was prepared using [U-14C]inosine as the [14C] ribose donor and commercial purine-nucleoside phosphorylase (EC 2.4.2.1) both to degrade the inosine, in the presence of phosphate, and to synthesize [14C-ribosyl]3-deazaguanosine in reduced phosphate and an excess of 3-deazaguanine. Purification was by high-pressure liquid chromatography (HPLC). [14C-ribosyl]3-Deazaguanosine was metabolized by Chinese hamster ovary cells to two metabolites, one major and one minor, eluting in the triphosphate region after HPLC analysis, and appeared to be incorporated into perchloric acid-insoluble material. Cell line TGR-3, deficient in hypoxanthine-guanine phosphoribosyltransferase (EC 2.4.2.8) and resistant to 3-deazaguanine, also formed both metabolites. Line TGR-1/DGRR-9, deficient in hypoxanthine-guanine phosphoribosyltransferase and resistant to both 3-deazaguanine and 3-deazaguanosine, formed greatly reduced levels of the major metabolite. 3-Deazaguanosine 5'-triphosphate, prepared enzymically from authentic 3-deazaguanosine 5'-monophosphate, co-eluted with the major metabolite peak during HPLC analysis. Treatment of a metabolite-containing extract with bacterial alkaline phosphatase (EC 3.1.3.1) resulted in the formation of 3-deazaguanosine. These observations indicate that 3-deazaguanosine can be metabolized, in Chinese hamster ovary cells, to the triphosphate derivative in lieu of the action of hypoxanthine-guanine phosphoribosyltransferase." @default.
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- W1578070377 date "1986-05-01" @default.
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- W1578070377 title "3-Deazaguanosine is metabolized to the triphosphate derivative in Chinese hamster cells deficient in hypoxanthine-guanine phosphoribosyltransferase." @default.
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- W1578070377 doi "https://doi.org/10.1016/s0021-9258(19)84577-5" @default.
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