Matrix proteins are inefficiently imported into Arabidopsis peroxisomes lacking the receptor-docking peroxin PEX14

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dc.citation.firstpage1
dc.citation.issueNumber2018-01-02T00:00:00.000
dc.citation.journalTitlePlant Molecular Biology
dc.citation.lastpage15
dc.citation.volumeNumber77
dc.contributor.authorMonroe-Augustus, Melanie
dc.contributor.authorRamón, Naxhiely Martínez
dc.contributor.authorRatzel, Sarah E.
dc.contributor.authorLingard, Matthew J.
dc.contributor.authorChristensen, Sarah E.
dc.contributor.authorMurali, Chaya
dc.contributor.authorBartel, Bonnie
dc.date.accessioned2018-07-10T18:32:40Z
dc.date.available2018-07-10T18:32:40Z
dc.date.issued2011
dc.description.abstractMutations in peroxisome biogenesis proteins (peroxins) can lead to developmental deficiencies in various eukaryotes. PEX14 and PEX13 are peroxins involved in docking cargo-receptor complexes at the peroxisomal membrane, thus aiding in the transport of the cargo into the peroxisomal matrix. Genetic screens have revealed numerous Arabidopsis thaliana peroxins acting in peroxisomal matrix protein import; the viable alleles isolated through these screens are generally partial loss-of-function alleles, whereas null mutations that disrupt delivery of matrix proteins to peroxisomes can confer embryonic lethality. In this study, we used forward and reverse genetics in Arabidopsis to isolate four pex14 alleles. We found that all four alleles conferred reduced PEX14 mRNA levels and displayed physiological and molecular defects suggesting reduced but not abolished peroxisomal matrix protein import. The least severe pex14 allele, pex14-3, accumulated low levels of a C-terminally truncated PEX14 product that retained partial function. Surprisingly, even the severe pex14-2 allele, which lacked detectable PEX14 mRNA and PEX14 protein, was viable, fertile, and displayed residual peroxisome matrix protein import. As pex14 plants matured, import improved. Together, our data indicate that PEX14 facilitates, but is not essential for peroxisomal matrix protein import in plants.
dc.identifier.citationMonroe-Augustus, Melanie, Ramón, Naxhiely Martínez, Ratzel, Sarah E., et al.. "Matrix proteins are inefficiently imported into Arabidopsis peroxisomes lacking the receptor-docking peroxin PEX14." <i>Plant Molecular Biology,</i> 77, no. 2018-01-02T00:00:00.000 (2011) Springer: 1-15. https://doi.org/10.1007/s11103-011-9782-0.
dc.identifier.digitalnihms426264
dc.identifier.doihttps://doi.org/10.1007/s11103-011-9782-0
dc.identifier.urihttps://hdl.handle.net/1911/102364
dc.language.isoeng
dc.publisherSpringer
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Springer.
dc.subject.keywordPeroxin
dc.subject.keywordPeroxisome import
dc.subject.keywordOrganelle targeting
dc.subject.keywordArabidopsis molecular genetics
dc.titleMatrix proteins are inefficiently imported into Arabidopsis peroxisomes lacking the receptor-docking peroxin PEX14
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpost-print
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