Related Experiment Videos
Messenger ribonucleoprotein particles from plant cell cultures
Zeitschrift Fur Naturforschung. Section C, Biosciences
|May 1, 1978
Summary
Researchers isolated novel messenger ribonucleoprotein (mRNP) particles from plant cells. These unique mRNPs, distinct in size, contain polyadenylated RNA, offering new insights into plant gene expression regulation.
Area of Science:
- Plant molecular biology
- Biochemistry
- Cell biology
Background:
- Messenger ribonucleoprotein (mRNP) particles play crucial roles in post-transcriptional gene regulation.
- Understanding the composition and dynamics of mRNPs is essential for deciphering gene expression control in plants.
Purpose of the Study:
- To isolate and characterize messenger ribonucleoprotein (mRNP) particles from plant cell polysomes.
- To determine the size distribution and RNA characteristics of these novel mRNP particles.
Main Methods:
- Isolation of mRNP particles from [3H] adenosine-labeled plant cell cultures.
- Analysis of particle size distribution using sucrose density gradients.
- Determination of buoyant density via CsCl gradients after glutaraldehyde fixation.
- Characterization of extracted RNA using affinity chromatography and ribonuclease digestion.
Main Results:
- Over 80% of labeled mRNP particles sedimented between 80 S and 30 S, distinct from previously reported polysomal mRNPs.
- Isolated mRNP particles exhibited a buoyant density of 1.38 g/cm3 in CsCl gradients.
- Extracted RNA displayed a heterodisperse size distribution and contained poly (A) sequences.
Conclusions:
- Plant cell polysomes contain a population of mRNP particles with unique sedimentation properties.
- These mRNPs are associated with heterodisperse RNA containing poly (A) tails, suggesting a role in mRNA processing or transport.