Chemicals and Drugs

Nucleoside Q

A modified nucleoside which is present in the first position of the anticodon of tRNA-tyrosine, tRNA-histidine, tRNA-asparagine and tRNA-aspartic acid of many organisms. It is believed to play a role in the regulatory function of tRNA. Nucleoside Q can be further modified to nucleoside Q*, which has a mannose or galactose moiety linked to position 4 of its cyclopentenediol moiety.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A modified nucleoside which is present in the first position of the anticodon of tRNA-tyrosine, tRNA-histidine, tRNA-asparagine and tRNA-aspartic acid of many organisms. It is believed to play a role in the regulatory function of tRNA. Nucleoside Q can be further modified to nucleoside Q*, which has a mannose or galactose moiety linked to position 4 of its cyclopentenediol moiety.

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Classification

Broader headings

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MeSH Record

Synonyms

5 entry terms
  • Q Nucleoside
  • Q-Ribonucleoside
  • Queuosine
  • Q Ribonucleoside
  • Nucleoside Q*

MeSH Record

Aspects Covered

29 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, analogs & derivatives, analysis, antagonists & inhibitors, biosynthesis, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, deficiency, economics, genetics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, urine.

MeSH Record

Indexing Annotation

/biosyn /physiol permitted

MeSH Record

History Note

91(80); was see under GUANOSINE 1980-90

MeSH Record

Previous Indexing

  • Guanosine (1972-1974)/analogs & derivatives (1975-1979)
  • Nucleosides (1966-1971)

MeSH Hierarchy

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AMA Style

References

  1. National Library of Medicine. Nucleoside Q. Medical Subject Headings (MeSH). 2026. Unique ID D009704. http://id.nlm.nih.gov/mesh/2026/D009704
  2. Nucleoside Q. In: Wikipedia. https://en.wikipedia.org/wiki/Queuosine
  3. Nucleoside Q. In: Wikidata. https://www.wikidata.org/wiki/Q425950