Analysis of the mouse hepatic peroxisome proteome: identification of novel protein constituents using a semi-quantitative SWATH-MS approach
Ongoing technical and bioinformatics improvements in mass spectrometry (MS) allow for the identifying and quantifying of the enrichment of increasingly less-abundant proteins in individual fractions. Accordingly, this study reassessed the proteome of mouse liver peroxisomes by the parallel isolation...
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| Hauptverfasser: | , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
17 January 2024
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| In: |
Cells
Year: 2024, Jahrgang: 13, Heft: 2, Pages: 1-23 |
| ISSN: | 2073-4409 |
| DOI: | 10.3390/cells13020176 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.3390/cells13020176 Verlag, kostenfrei, Volltext: https://www.mdpi.com/2073-4409/13/2/176 
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| Verfasserangaben: | Öznur Singin, Artur Astapenka, Victor Costina, Sandra Kühl, Nina Bonekamp, Oliver Drews and Markus Islinger |
MARC
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| 245 | 1 | 0 | |a Analysis of the mouse hepatic peroxisome proteome |b identification of novel protein constituents using a semi-quantitative SWATH-MS approach |c Öznur Singin, Artur Astapenka, Victor Costina, Sandra Kühl, Nina Bonekamp, Oliver Drews and Markus Islinger |
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| 520 | |a Ongoing technical and bioinformatics improvements in mass spectrometry (MS) allow for the identifying and quantifying of the enrichment of increasingly less-abundant proteins in individual fractions. Accordingly, this study reassessed the proteome of mouse liver peroxisomes by the parallel isolation of peroxisomes from a mitochondria- and a microsome-enriched prefraction, combining density-gradient centrifugation with a semi-quantitative SWATH-MS proteomics approach to unveil novel peroxisomal or peroxisome-associated proteins. In total, 1071 proteins were identified using MS and assessed in terms of their distribution in either high-density peroxisomal or low-density gradient fractions, containing the bulk of organelle material. Combining the data from both fractionation approaches allowed for the identification of specific protein profiles characteristic of mitochondria, the ER and peroxisomes. Among the proteins significantly enriched in the peroxisomal cluster were several novel peroxisomal candidates. Five of those were validated by colocalization in peroxisomes, using confocal microscopy. The peroxisomal import of HTATIP2 and PAFAH2, which contain a peroxisome-targeting sequence 1 (PTS1), could be confirmed by overexpression in HepG2 cells. The candidates SAR1B and PDCD6, which are known ER-exit-site proteins, did not directly colocalize with peroxisomes, but resided at ER sites, which frequently surrounded peroxisomes. Hence, both proteins might concentrate at presumably co-purified peroxisome-ER membrane contacts. Intriguingly, the fifth candidate, OCIA domain-containing protein 1, was previously described as decreasing mitochondrial network formation. In this work, we confirmed its peroxisomal localization and further observed a reduction in peroxisome numbers in response to OCIAD1 overexpression. Hence, OCIAD1 appears to be a novel protein, which has an impact on both mitochondrial and peroxisomal maintenance. | ||
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