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Related Experiment Videos

Patterns of urease synthesis in developing soybeans.

J C Polacco1, R B Sparks

  • 1Biochemistry Department, University of Missouri, Columbia, Missouri 65212.

Plant Physiology
|July 1, 1982
PubMed
Summary
This summary is machine-generated.

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Soybean seed urease is synthesized on large polysomes and directed by large RNA. Urease activity increases during development, suggesting polymerization in mature beans.

Area of Science:

  • Plant Biochemistry
  • Molecular Biology
  • Seed Development

Background:

  • Soybean seed urease is a key enzyme in nitrogen metabolism.
  • Understanding urease synthesis provides insights into plant protein biosynthesis.

Purpose of the Study:

  • To investigate the synthesis and regulation of soybean seed urease.
  • To characterize the molecular mechanisms underlying urease production during seed development.

Main Methods:

  • In vivo polysome analysis to identify sites of urease synthesis.
  • In vitro translation assays using isolated RNA to direct urease production.
  • Quantification of urease antigen and enzyme activity throughout seed development.

Main Results:

Related Experiment Videos

  • Soybean urease is synthesized on large polysomes (n >/= 15) and directed by large RNA (3,000-3,300 nucleotides).
  • Urease antigen levels peak early, while enzyme activity appears later and increases throughout development.
  • Mature beans show altered urease forms, suggesting post-translational modifications or polymerization.

Conclusions:

  • Urease synthesis is tightly regulated during soybean seed development.
  • Post-translational events likely contribute to the observed increase in urease activity and polymerization in mature seeds.