Extraction and quantitative precipitation of nuclear ribonucleoprotein particles

Perpetua M. Muganda-Ojiaku, Howard J. Edenberg

Research output: Contribution to journalArticle

Abstract

Ribonucleoprotein particles (RNPs) were extracted from monkey cell nuclei in media of low ionic strength. The rapidly labeled RNPs were comparable in terms of size, protein patterns and protein content to those extracted by sonication. The overnight labeled RNPs were homogenous (sedimenting at 60–65 S and containing RNA of 30–31S), and appear to be a subset of pre-ribosomal RNPs. This procedure produces nuclear RNPs free of contaminating chromatin. Nuclear RNPs (rapidly-labeled and overnight-labeled RNPs, extracted by either our procedure or by sonication), quantitatively precipitated in 10 mM MgCl2 when the concentration of monovalent cations was low. There was no detectable degradation of the RNA components, nor was there loss of enzymatic activity of an RNP associated protein kinase. Precipitation in Mg++ provides a rapid, gentle and convenient method of concentrating RNPs.

Original languageEnglish (US)
Pages (from-to)1-19
Number of pages19
JournalPreparative Biochemistry
Volume16
Issue number1
DOIs
StatePublished - Mar 1 1986

Fingerprint

Ribonucleoproteins
Sonication
RNA
Monovalent Cations
Magnesium Chloride
RNA Stability
Ionic strength
Cell Nucleus
Osmolar Concentration
Protein Kinases
Chromatin
Haplorhini
Proteins
Cells
Degradation

ASJC Scopus subject areas

  • Biochemistry
  • Genetics

Cite this

Extraction and quantitative precipitation of nuclear ribonucleoprotein particles. / Muganda-Ojiaku, Perpetua M.; Edenberg, Howard J.

In: Preparative Biochemistry, Vol. 16, No. 1, 01.03.1986, p. 1-19.

Research output: Contribution to journalArticle

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