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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Changes in targeting efficiencies of proteins to plant microbodies caused by amino acid substitutions in the carboxy-terminal tripeptide.

It has been demonstrated that the carboxyl terminus of microbody enzymes functions as a targeting signal to microbodies in higher plants. We have examined an ability of 24 carboxy-terminal amino acid sequences to facilitate the transport of a cytosolic passenger protein, beta-glucuronidase, into microbodies in green cotyledonary cells of transgenic Arabidopsis. Immunoelectron microscopic analysis revealed that carboxy-terminal tripeptide sequences of the form [C/A/S/P]-[K/R]-[I/L/M] function as a microbody-targeting signal, although tripeptides with proline at the first amino acid position and isoleucine at the carboxyl terminus show weak targeting efficiencies. All known microbody enzymes that are synthesized in a form similar in size to the mature molecule, except catalase, contain one of these tripeptide sequences at their carboxyl terminus.[1]

References

  1. Changes in targeting efficiencies of proteins to plant microbodies caused by amino acid substitutions in the carboxy-terminal tripeptide. Hayashi, M., Aoki, M., Kondo, M., Nishimura, M. Plant Cell Physiol. (1997) [Pubmed]
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