Cooperation of Sly1/SM-family protein and sec18/NSF of Saccharomyces cerevisiae in disassembly of cis-SNARE membrane-protein complexes.
Assembly and disassembly of the SNARE membrane-protein complexes plays a key role in vesicular trafficking. The SM-family Slyl protein binds to the tSNARE Sed5 protein and stimulates its assembly into a trans-SNARE complex. Disassembly of the resulting cis-SNARE complex containing Sed5 was retarded in a temperature-sensitive yeast mutant of Slyl protein with a defect in binding to Sed5. A temperature-sensitive mutation (sec18-1) of Sec18/NSF disassembly ATPase showed synthetic lethality with the sly1(ts) mutation. These results suggest that Slyl and Sec18 proteins work cooperatively and that the binding of Slyl to Sed5 stimulates the disassembly of the cis-SNARE complex by Sec18 ATPase.
Department of Biotechnology, University of Tokyo, Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan.
Yoichi
Y
Kosodo
Yoichi
Y
Noda
Hiroyuki
H
Adachi
Koji
K
Yoda
D000251:Adenosine Triphosphatases / Q000235:genetics; D002352:Carrier Proteins / Q000235:genetics / Q000378:metabolism*; D005656:Fungal Proteins / Q000235:genetics / Q000378:metabolism*; D006358:Hot Temperature; D008561:Membrane Fusion; D008565:Membrane Proteins / Q000378:metabolism*; D051938:Munc18 Proteins; D052066:N-Ethylmaleimide-Sensitive Proteins; D050765:Qa-SNARE Proteins; D012441:Saccharomyces cerevisiae / Q000254:growth & development / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics / Q000378:metabolism*; D022161:Transport Vesicles / Q000378:metabolism; D033921:Vesicular Transport Proteins
D002352:Carrier Proteins; D005656:Fungal Proteins; D008565:Membrane Proteins; D051938:Munc18 Proteins; D050765:Qa-SNARE Proteins; C072520:SLY1 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins; C077554:Sed5 protein, S cerevisiae; D033921:Vesicular Transport Proteins; D000251:Adenosine Triphosphatases; C064404:SEC18 protein, S cerevisiae; D052066:N-Ethylmaleimide-Sensitive Proteins