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Molecular Cell Biology: Mechanisms and Regulation of Protein Import into the Plant Cell Nucleus

  • Vera Hemleben
  • Katrin Hinderhofer
  • Ulrike Zentgraf
Part of the Progress in Botany book series (BOTANY, volume 63)

Abstract

Plant cells contain three genetically active compartments embedded in the cytoplasm which are acting in strictly regulated cooperation (Sitte 1998). Translation of proteins from organelle-encoded genes occurs in the respective semiautonomous plastid or mitochondrial compartments (stroma and matrix, respectively). Nuclear-encoded genes are transcribed in the cell nucleus, and posttranscriptionally modified mRNA, tRNA and preformed ribosomes are transported to the cytoplasm. The nuclear mRNA is translated into polypeptides either directly at free cytoplasmic ribosomes or at ribosomes associated with the rough endoplasmic reticulum (ER). Proteins necessary for the correct functioning of the cell have to be transported to the respective locations. Characteristic signal- or transit-peptides at the N-terminus of specific proteins mediate the correct transport to the plasma membrane or into the chloroplasts and mitochondria; other characteristic short motifs were found in proteins targeted to the vacuole, peroxisomes or into the cell nucleus.

Keywords

Nuclear Localization Signal Nuclear Import Nuclear Pore Complex Xanthomonas Campestris Molecular Cell Biology 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Vera Hemleben
    • 1
  • Katrin Hinderhofer
    • 1
  • Ulrike Zentgraf
    • 1
  1. 1.ZMBP (Zentrum für Molekularbiolobgie der Pflanzen) Allgemeine GenetikTübingenGermany

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