ArticleEukaryotic cell2014
A role for the rap GTPase YlRsr1 in cellular morphogenesis and the involvement of YlRsr1 and the ras GTPase YlRas2 in bud site selection in the dimorphic yeast Yarrowia lipolytica.
Article in Eukaryotic cell, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed, 11 citations in OpenAlex.
- Actin dynamics controlled by IqgC, a RasGAP at the crossroads between the IQGAP and fungal GAP1 families.FEBS open bio · 2026Review
- Rax1/2 promote memory of growth by early Ras1 activation to maintain polarity across generations.bioRxiv : the preprint server for biology · 2025Article
- Copper Ion Mediates Yeast-to-Hypha Transition inJournal of fungi (Basel, Switzerland) · 2023Article
- Overexpression of theJournal of fungi (Basel, Switzerland) · 2020Article
- Cellular and metabolic engineering of oleaginous yeastEngineering in life sciences · 2019Review
- Integrating Cellular and Bioprocess Engineering in the Non-Conventional YeastFrontiers in bioengineering and biotechnology · 2017Review
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4 authors at 2 institutions in 1 country.
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Abstract
Yarrowia lipolytica is a dimorphic yeast species that can grow in the ovoid yeast form or in the elongated pseudohyphal or hyphal form depending on the growth conditions. Here, we show that the Rap GTPase Rsr1 of Y. lipolytica (YlRsr1) plays an important role in cellular morphogenesis in this microorganism. Cells deleted for YlRSR1 exhibited impaired polarized growth during yeast-form growth. Pseudohyphal and hyphal development were also abnormal. YlRsr1 is also important for cell growth, since the deletion of YlRSR1 in cells lacking the Ras GTPase YlRas2 caused lethality. Y. lipolytica cells bud in a bipolar pattern in which the cells produce the new buds at the two poles. YlRsr1 plays a prominent role in this bud site selection process. YlRsr1's function in bud site selection absolutely requires the cycling of YlRsr1 between the GTP- and GDP-bound states but its function in cellular morphogenesis does not, suggesting that the two processes are differentially regulated. Interestingly, the Ras GTPase YlRas2 is also involved in the control of bud site selection, as Ylras2Δ cells were severely impaired in bipolar bud site selection. The GTP/GDP cycling and the plasma membrane localization of YlRas2 are important for YlRas2's function in bud site selection. However, they are not essential for this process, suggesting that the mechanism by which YlRas2 acts is different from that of YlRsr1. Our results suggest that YlRsr1 is regulated by the GTPase-activating protein (GAP) YlBud2 and partially by YlCdc25, the potential guanine nucleotide exchange factor (GEF) for YlRas2.
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