Genetic interactions with the yeast Q-SNARE VTI1 reveal novel functions for the R-SNARE YKT6

Dilcher M, Kohler B, Fischer von Mollard G (2001)
JOURNAL OF BIOLOGICAL CHEMISTRY 276(37): 34537-34544.

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Abstract / Bemerkung
SNARE proteins are required for fusion of transport vesicles with target membranes. Previously, we found that the yeast Q-SNARE Vti1p is involved in transport to the cis-Golgi, to the prevacuole/late endosome, and to the vacuole. Here we identified a previously uncharacterized gene, VTS1, and the R-SNARE YKT6 both as multicopy and as low copy suppressors of the growth and vacuolar transport defect in uti1-2 cells. Ykt6p was known to function in retrograde traffic to the cis-Golgi and homotypic vacuolar fusion. We found that VTI1 and YKT6 also interacted in traffic to the prevacuole and vacuole, indicating that these SNARE complexes contain Ykt6p, Vti1p, plus Pep12p and Ykt6p, Vti1p, Vam3p, plus Vam7p, respectively. As Ykt6p was required for several transport steps, R-SNAREs cannot be the sole determinants of specificity. To study the role of the 0 layer in the SNARE motif, we introduced the mutations vti1-Q158R and ykt6-R165Q. SNARE complexes to which Ykt6p contributed a fourth glutamine residue in the 0 layer were nonfunctional, suggesting an essential function for arginine in the 0 layer of these complexes. vti1-Q158R cells had severe defects in several transport steps, indicating that the second arginine in the 0 layer interfered with function.
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Zeitschriftentitel
JOURNAL OF BIOLOGICAL CHEMISTRY
Band
276
Zeitschriftennummer
37
Seite
34537-34544
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Dilcher M, Kohler B, Fischer von Mollard G. Genetic interactions with the yeast Q-SNARE VTI1 reveal novel functions for the R-SNARE YKT6. JOURNAL OF BIOLOGICAL CHEMISTRY. 2001;276(37):34537-34544.
Dilcher, M., Kohler, B., & Fischer von Mollard, G. (2001). Genetic interactions with the yeast Q-SNARE VTI1 reveal novel functions for the R-SNARE YKT6. JOURNAL OF BIOLOGICAL CHEMISTRY, 276(37), 34537-34544. doi:10.1074/jbc.M101551200
Dilcher, M., Kohler, B., and Fischer von Mollard, G. (2001). Genetic interactions with the yeast Q-SNARE VTI1 reveal novel functions for the R-SNARE YKT6. JOURNAL OF BIOLOGICAL CHEMISTRY 276, 34537-34544.
Dilcher, M., Kohler, B., & Fischer von Mollard, G., 2001. Genetic interactions with the yeast Q-SNARE VTI1 reveal novel functions for the R-SNARE YKT6. JOURNAL OF BIOLOGICAL CHEMISTRY, 276(37), p 34537-34544.
M. Dilcher, B. Kohler, and G. Fischer von Mollard, “Genetic interactions with the yeast Q-SNARE VTI1 reveal novel functions for the R-SNARE YKT6”, JOURNAL OF BIOLOGICAL CHEMISTRY, vol. 276, 2001, pp. 34537-34544.
Dilcher, M., Kohler, B., Fischer von Mollard, G.: Genetic interactions with the yeast Q-SNARE VTI1 reveal novel functions for the R-SNARE YKT6. JOURNAL OF BIOLOGICAL CHEMISTRY. 276, 34537-34544 (2001).
Dilcher, M, Kohler, B, and Fischer von Mollard, Gabriele. “Genetic interactions with the yeast Q-SNARE VTI1 reveal novel functions for the R-SNARE YKT6”. JOURNAL OF BIOLOGICAL CHEMISTRY 276.37 (2001): 34537-34544.

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