Evolution of Renal-Disease Factor APOL1 Results in Cis and Trans Orientations at the Endoplasmic Reticulum That Both Show Cytotoxic Effects
| Autor: | Daria Müller, Ann-Christin Groh, Jürgen Schmitz, Till Maximilian Amelung, Simona Mareike Lüttgenau, Thomas Weide, Vanessa Krausel, Katharina Fischer, Hermann Pavenstädt, Daniel Granado |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Transposable element
Primates Apolipoprotein L1 kidney disease Mutant AcademicSubjects/SCI01180 Endoplasmic Reticulum Transcriptome Mice Genetics Gene family Animals Secretion APOL2 APOL1 Molecular Biology Gene Ecology Evolution Behavior and Systematics Discoveries Phylogeny Mammals biology Endoplasmic reticulum APOL gene family APOL phylogeny APOL selection analyses AcademicSubjects/SCI01130 Apolipoproteins evolutionary medicine biology.protein |
| Zdroj: | Molecular Biology and Evolution |
| ISSN: | 1537-1719 0737-4038 |
| Popis: | The recent and exclusively in humans and a few other higher primates expressed APOL1 (apolipoprotein L1) gene is linked to African human trypanosomiasis (also known as African sleeping sickness) as well as to different forms of kidney diseases. Whereas APOL1’s role as a trypanolytic factor is well established, pathobiological mechanisms explaining its cytotoxicity in renal cells remain unclear. In this study, we compared the APOL family members using a combination of evolutionary studies and cell biological experiments to detect unique features causal for APOL1 nephrotoxic effects. We investigated available primate and mouse genome and transcriptome data to apply comparative phylogenetic and maximum likelihood selection analyses. We suggest that the APOL gene family evolved early in vertebrates and initial splitting occurred in ancestral mammals. Diversification and differentiation of functional domains continued in primates, including developing the two members APOL1 and APOL2. Their close relationship could be diagnosed by sequence similarity and a shared ancestral insertion of an AluY transposable element. Live-cell imaging analyses showed that both expressed proteins show a strong preference to localize at the endoplasmic reticulum (ER). However, glycosylation and secretion assays revealed that—unlike APOL2—APOL1 membrane insertion or association occurs in different orientations at the ER, with the disease-associated mutants facing either the luminal (cis) or cytoplasmic (trans) side of the ER. The various pools of APOL1 at the ER offer a novel perspective in explaining the broad spectrum of its observed toxic effects. |
| Databáze: | OpenAIRE |
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