6533b7d4fe1ef96bd126299a

RESEARCH PRODUCT

Presence of phosphorylatedO-ribosyl-adenosine In T-ψ-stem of yeast methlonine initiator tRNA

Kenneth C. KuoJean DesgresGérard KeithCharles W. Gehrke

subject

Poly Adenosine Diphosphate RiboseAdenosineRNA Transfer MetIon chromatographySaccharomyces cerevisiaeGuanosineSaccharomyces cerevisiaeBiologyChromatography DEAE-CelluloseGas Chromatography-Mass Spectrometrychemistry.chemical_compoundMethionineGeneticsmedicinePhosphorylationChromatography High Pressure LiquidGuanosineAdenosine diphosphate riboseNucleosidesRNA Transfer Amino Acid-SpecificFast atom bombardmentbiology.organism_classificationAdenosineYeastchemistryBiochemistryNucleic Acid ConformationNucleosidemedicine.drug

description

We report in this paper on isolation and characterization of two unknown nucleosides G* and [A*] located in the T-psi-stem of yeast methionine initiator tRNA, using the combined means of HPLC protocols, real time UV-absorption spectrum, and post-run mass spectrometry by electron impact or fast atom bombardment. The G* nucleoside in position 65 was identified as unmodified guanosine. The structure of the unknown [A*] in position 64 was characterized as an isomeric form of O-ribosyl-adenosine by comparison of its chromatographic, UV-spectral and mass spectrometric properties with those of authentic O-alpha-ribofuranosyl-(1"----2')-adenosine isolated from biosynthetic poly(adenosine diphosphate ribose). Our studies also brought evidence for the presence of a phosphorylmonoester group located on this new modified nucleoside [A*], when isolated by ion exchange chromatography from enzymic hydrolysis of yeast initiator tRNAMet without phosphatase treatment.

yearjournalcountryeditionlanguage
1989-02-11Nucleic Acids Research
https://doi.org/10.1093/nar/17.3.865