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Protein Targeting and Import

  • James Whelan
  • Enrico Schleiff
Chapter
  • 580 Downloads
Part of the Advances in Photosynthesis and Respiration book series (AIPH, volume 17)

Summary

The targeting of nuclear encoded proteins to mitochondria requires that they are specifically imported from the pool of all proteins synthesised in the cytosol. This is more complicated in plant cells compared to other cells due to the presence of plastids, whose targeting signals resemble those of mitochondrial targeting signals in many aspects. Although it is generally believed that cytosolic factors should play a role in sorting between the two organelles there is no evidence for such a role. Rather, the physiochemical properties of targeting signals and the mechanism of targeting signal recognition by surface bound receptors, combined with regulation of the import process are all likely to combine to achieve targeting specificity. Our knowledge of the mitochondrial import apparatus in plants has been greatly aided by the availability of the complete Arabidopsis genome sequence, which has been used to define components of the import apparatus in plants, and how they differ structurally and mechanistically to those in other systems.

Keywords

Transit Peptide Alternative Oxidase Plant Mitochondrion Dual Target Chloroplast Transit Peptide 
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.

Abbreviations

AAC

ATP/ADP carrier

CCHL

mitochondrial heme lyases

Mdp

mitochondrial down protein import

MIP

mitochondrial intermediate peptidase

MPP

mitochondrial processing peptidase

MSF

mitochondrial import stimulating factor

NAC

nascent polypeptide associated complex

Rubisco

ribulose 1,5 bisphosphate carboxylase oxygenase

TIM

translocase of the inner mitochondrial membrane

TOC

translocase of the outer envelope membrane of chloroplasts

TOM

translocase of the outer mitochondrial membrane

UCP

uncoupling protein

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Copyright information

© Springer Science+Business Media Dordrecht 2004

Authors and Affiliations

  • James Whelan
    • 1
  • Enrico Schleiff
    • 2
  1. 1.Plant Molecular Biology Group, School of Biomedical and Chemical SciencesUniversity of Western AustraliaCrawleyAustralia
  2. 2.LMU MunchenMunchenGermany

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