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Related Experiment Videos

Monosaccharide transporters in plants: structure, function and physiology.

M Büttner1, N Sauer

  • 1Lehrstuhl Botanik II, Molekulare Pflanzenphysiologie, Universität Erlangen-Nürnberg, Staudtstrasse 5, 91058, Erlangen, Germany.

Biochimica Et Biophysica Acta
|April 5, 2000
PubMed
Summary

Plant monosaccharide transporters facilitate sugar movement across cell membranes, crucial for energy in both simple and complex plants. These transporters exhibit diverse roles and are regulated by development and environment.

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Area of Science:

  • Plant biology
  • Molecular biology
  • Biochemistry

Background:

  • Monosaccharide transport is vital for plant carbon metabolism, enabling algae and higher plants to utilize sugars.
  • Plants exhibit complex carbon partitioning, relying on numerous transporters for nutrient distribution.

Purpose of the Study:

  • To investigate the structure, function, and regulation of plant monosaccharide transporters.
  • To understand the role of these transporters in plant growth and adaptation.

Main Methods:

  • Gene and cDNA cloning of monosaccharide transporter families.
  • Structural analysis of transporter proteins and identification of substrate-binding domains.
  • Functional characterization using heterologous expression in yeast and frog oocytes.

Related Experiment Videos

  • Localization studies via immunohistochemistry, in situ hybridization, and reporter gene assays in transgenic plants.

    • Main Results:

    • Identified integral membrane proteins homologous to known sugar transporters, featuring 12 transmembrane helices.
    • Determined substrate specificities and kinetic parameters of plant monosaccharide transporters.
    • Revealed tissue-specific and developmentally regulated expression patterns for many transporter genes.
    • Demonstrated that individual transporters often have specialized functions within specific cell types.

    Conclusions:

    • Plant plasma membrane monosaccharide transporters form large, diverse families with specialized functions.
    • These transporters are crucial for carbon allocation and are finely tuned by developmental and environmental cues.
    • Understanding these transporters offers insights into plant physiology and resource management.