| Inhibition of RNA synthesis in Neurospora crassa hyphae treated with picolinic acid. | |
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MedLine Citation:
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PMID: 6173217 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Picolinic acid, a metal-chelating agent, blocks the nuclei of germinating conidia of Neurospora crassa in the G1 phase. The addition of picolinic acid to exponentially growing cultures of N. crassa in glucose medium causes an immediate inhibition of growth. Concentrations higher than 50 mM completely inhibit growth of mycelia, whereas lower concentrations (20-30 mM) give only a partial inhibition. Picolinic acid, added at the concentration of 20 mM, immediately blocks the accumulation of stable RNA, while protein accumulation continues at an unchanged rate for at least 30 min and only thereafter is slightly inhibited. DNA accumulation rapidly slows down after the addition of the drug. The level of polyadenylated RNA decreases quickly after the addition of picolinic acid, and the rate of its synthesis also appears to be inhibited. Picolinic acid greatly affects the metabolism of stable RNA in N. crassa: both processing and transcription of rRNA are sequentially inhibited with a moderate accumulation of precursor rRNA. It is concluded that the effects of picolinic acid on the nuclear division cycle in Neurospora may be related to the requirement of specific gene products to enter the S phase, whose synthesis is inhibited following the reduction of polyadenylated RNA synthesis. |
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Authors:
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E Martegani |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: European journal of biochemistry / FEBS Volume: 121 ISSN: 0014-2956 ISO Abbreviation: Eur. J. Biochem. Publication Date: 1981 Dec |
Date Detail:
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Created Date: 1982-04-12 Completed Date: 1982-04-12 Revised Date: 2007-07-23 |
Medline Journal Info:
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Nlm Unique ID: 0107600 Medline TA: Eur J Biochem Country: GERMANY, WEST |
Other Details:
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Languages: eng Pagination: 71-6 Citation Subset: IM |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Centrifugation, Density Gradient DNA / metabolism Electrophoresis, Agar Gel Kinetics Neurospora / metabolism* Neurospora crassa / drug effects, growth & development, metabolism* Picolinic Acids / pharmacology* Poly A / biosynthesis RNA / biosynthesis* RNA, Messenger RNA, Ribosomal / biosynthesis |
| Chemical | |
Reg. No./Substance:
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0/Picolinic Acids; 0/RNA, Messenger; 0/RNA, Ribosomal; 24937-83-5/Poly A; 63231-63-0/RNA; 9007-49-2/DNA |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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