Kalel, V.C.* ; Li, M.* ; Gaussmann, S. ; Delhommel, F. ; Schaefer, A.* ; Tippler, B.* ; Jung, M.* ; Maier, R.* ; Oeljeklaus, S.* ; Schliebs, W.* ; Warscheid, B.* ; Sattler, M. ; Erdmann, R.*
Evolutionary divergent PEX3 is essential for glycosome biogenesis and survival of trypanosomatid parasites.
Biochim. Biophys. Acta-Mol. Cell Res. 1866:118520 (2019)
Trypanosomatid parasites cause devastating African sleeping sickness, Chagas disease, and Leishmaniasis that affect about 18 million people worldwide. Recently, we showed that the biogenesis of glycosomes could be the "Achilles' heel" of trypanosomatids suitable for the development of new therapies against trypanosomiases. This was shown for inhibitors of the import machinery of matrix proteins, while the distinct machinery for the topogenesis of glycosomal membrane proteins evaded investigation due to the lack of a druggable interface. Here we report on the identification of the highly divergent trypanosomal PEX3, a central component of the transport machinery of peroxisomal membrane proteins and the master regulator of peroxisome biogenesis. The trypanosomatid PEX3 shows very low degree of conservation and its identification was made possible by a combinatory approach identifying of PEX19-interacting proteins and secondary structure homology screening. The trypanosomal PEX3 localizes to glycosomes and directly interacts with the membrane protein import receptor PEX19. RNAi-studies revealed that the PEX3 is essential and that its depletion results in mislocalization of glycosomal proteins to the cytosol and a severe growth defect. Comparison of the parasites and human PEX3-PEX19 interface disclosed differences that might be accessible for drug development. The absolute requirement for biogenesis of glycosomes and its structural distinction from its human counterpart make PEX3 a prime drug target for the development of novel therapies against trypanosomiases. The identification paves the way for future drug development targeting PEX3, and for the analysis of additional partners involved in this crucial step of glycosome biogenesis.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Typ der Hochschulschrift
Herausgeber
Schlagwörter
Protein Import; Blood-stream; Functional-characterization; Inducible Expression; Zellweger-syndrome; Membrane-proteins; Brucei; Identification; Peroxisomes; Pex19p
Keywords plus
Sprache
englisch
Veröffentlichungsjahr
2019
Prepublished im Jahr
HGF-Berichtsjahr
2019
ISSN (print) / ISBN
0167-4889
e-ISSN
1879-2596
ISBN
Bandtitel
Konferenztitel
Konferzenzdatum
Konferenzort
Konferenzband
Quellenangaben
Band: 1866,
Heft: 12,
Seiten: ,
Artikelnummer: 118520
Supplement: ,
Reihe
Verlag
Elsevier
Verlagsort
Radarweg 29, 1043 Nx Amsterdam, Netherlands
Tag d. mündl. Prüfung
0000-00-00
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Gutachter
Prüfer
Topic
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Veröffentlichungsdatum
0000-00-00
Anmeldedatum
0000-00-00
Anmelder/Inhaber
weitere Inhaber
Anmeldeland
Priorität
Begutachtungsstatus
Peer reviewed
POF Topic(s)
30203 - Molecular Targets and Therapies
Forschungsfeld(er)
Enabling and Novel Technologies
PSP-Element(e)
G-503000-001
Förderungen
Copyright
Erfassungsdatum
2019-12-23