title: Arabidopsis peroxisome proteomics.
abstract: The analytical depth of investigation of the peroxisomal proteome of the model plant Arabidopsis thaliana has not yet reached that of other major cellular organelles such as chloroplasts or mitochondria. This is primarily due to the difficulties associated with isolating and obtaining purified samples of peroxisomes from Arabidopsis. So far only a handful of research groups have been successful in obtaining such fractions. To make things worse, enriched peroxisome fractions frequently suffer from significant organellar contamination, lowering confidence in localization assignment of the identified proteins. As with other cellular compartments, identification of peroxisomal proteins forms the basis for investigations of the dynamics of the peroxisomal proteome. It is therefore not surprising that, in terms of functional analyses by proteomic means, peroxisomes are lagging considerably behind chloroplasts or mitochondria. Alternative strategies are needed to overcome the obstacle of hard-to-obtain organellar fractions. This will help to close the knowledge gap between peroxisomes and other organelles and provide a full picture of the physiological pathways shared between organelles. In this review, we briefly summarize the status quo and discuss some of the methodological alternatives to classic organelle proteomic approaches.
authors: Australian Research Council Centre of Excellence in Plant Energy Biology, The University of Western Australia Crawley, WA, Australia.
authors: John D
authors: JD
authors: Bussell
authors: Christof
authors: C
authors: Behrens
authors: Wiebke
authors: W
authors: Ecke
authors: Holger
authors: H
authors: Eubel
keywords: free-flow electrophoresis; functional proteomics; peroxisome; protein:protein interaction; subcellular localization; targeted quantitation of proteins
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