Abstract
Peroxisomes are dynamic organelles of eukaryotic cells performing a wide range of functions including fatty acid oxidation, peroxide detoxification and ether-lipid synthesis in mammals. Peroxisomes lack their own DNA and therefore have to import proteins post-translationally. Peroxisomes can import folded, co-factor bound and even oligomeric proteins. The involvement of cycling receptors is a special feature of peroxisomal protein import. Complex machineries of peroxin (PEX) proteins mediate peroxisomal matrix and membrane protein import. Identification of PEX genes was dominated by forward genetic techniques in the early 90s. However, recent developments in proteomic techniques has revolutionized the detailed characterization of peroxisomal protein import. Here, we summarize the current knowledge on peroxisomal protein import with emphasis on the contribution of proteomic approaches to our understanding of the composition and function of the peroxisomal protein import machineries.
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Abbreviations
- AAA:
-
ATPase Associated with diverse cellular Activities
- DUBs:
-
De-ubiquitinating enzymes
- mPTS:
-
membrane Peroxisome Targeting Signal
- PBDs:
-
Peroxisome Biogenesis Disorders
- PEX:
-
Peroxin
- PMPs:
-
Peroxisomal Membrane Proteins
- PTS:
-
Peroxisome Targeting Signal
- RING:
-
Really Interesting New Gene
- SH3:
-
Src Homology 3
- TEV:
-
Tobacco Etch Virus protease
- TPA:
-
TEV cleavage site—protein A
- TPR:
-
Tetratrico-Peptide Repeat
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Acknowledgements
The work is supported by a FoRUM Grant (F883-2016, F913-2017) of the Ruhr-University Bochum and by the Deutsche Forschungsgemeinschaft (FOR1905). The authors apologize to all those in the community whose work could not be discussed due to space limitations.
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Kalel, V.C., Erdmann, R. (2018). Unraveling of the Structure and Function of Peroxisomal Protein Import Machineries. In: del RÃo, L., Schrader, M. (eds) Proteomics of Peroxisomes. Subcellular Biochemistry, vol 89. Springer, Singapore. https://doi.org/10.1007/978-981-13-2233-4_13
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