Abstract
SNAREs are required for specific membrane fusion throughout the endomembrane system. Here we report the characterization of rat ykt6, a prenylated SNARE selectively expressed in brain neurons. Immunofluorescence microscopy in neuronal and neuroendocrine cell lines revealed that membrane-associated ykt6 did not colocalize significantly with any conventional markers of endosomes, lysosomes, or the secretory pathway. However, ykt6-containing membranes displayed very minor overlaps with lysosomes and dense-core secretory granules and were similar to lysosomes in buoyant density. Thus, ykt6 appears to be specialized for the trafficking of a unique membrane compartment, perhaps related to lysosomes, involved in aspects of neuronal function. Targeting of this SNARE to the ykt6 compartment was mediated by its profilin-like amino-terminal domain, even in the absence of protein prenylation. Although several other R-SNAREs contain related amino-terminal domains, only the ykt6 version was able to confer the specialized localization. Rat ykt6, which contains an arginine in its SNARE motif zero-layer, was found to behave like other R-SNAREs in its SNARE assembly properties. Interestingly, cytosolic ykt6, constituting more than half of the total cellular pool, appeared to be conformationally inactive for SNARE complex assembly, perhaps indicative of a regulatory mechanism that prevents promiscuous and potentially deleterious SNARE interactions.
References
57
Referenced
72
10.1083/jcb.146.4.765
/ J. Cell Biol. by Advani R.J. (1999)10.1034/j.1600-0854.2001.20803.x
/ Traffic by Alory C. (2001){'key': 'B3', 'first-page': '14', 'volume': '14', 'author': 'Antonin W.', 'year': '2002', 'journal-title': 'Nat. Struct. Biol.'}
/ Nat. Struct. Biol. by Antonin W. (2002)10.1093/emboj/19.23.6453
/ EMBO J. by Antonin W. (2000)10.1091/mbc.8.7.1261
10.1038/35057024
/ Nature by Bock J.B. (2001)10.1101/gr.6.9.791
/ Genome Res by Bonaldo M.F. (1996)10.1021/bi00019a004
/ Biochemistry by Borgstahl G.E. (1995)10.1083/jcb.200104093
/ J. Cell Biol. by Brickner J.H. (2001)10.1111/j.1469-7793.2000.t01-2-00011.x
/ J. Physiol. (Lond). by Buckley K.M. (2000)10.1089/104454999315529
/ DNA Cell Biol by Catchpoole D.R. (1999)10.1083/jcb.101.1.85
/ J. Cell Biol. by Chen J.W. (1985)10.1523/JNEUROSCI.19-22-09803.1999
/ J. Neurosci. by Coco S. (1999)10.1074/jbc.M101551200
/ J. Biol. Chem., by Dilcher M. (2001)10.1074/jbc.274.22.15440
/ J. Biol. Chem. by Fasshauer D. (1999)10.1073/pnas.95.26.15781
/ Proc. Natl. Acad. Sci. USA by Fasshauer D. (1998)10.1038/35025084
/ Nature by Fukuda R. (2000)10.1016/S1367-5931(98)80034-3
/ Curr Opin Chem Biol by Gelb M. (1998){'key': 'B19', 'first-page': '17', 'volume': '17', 'author': 'Gonzalez L.C.', 'year': '2001', 'journal-title': 'J. Biol. Chem.'}
/ J. Biol. Chem. by Gonzalez L.C. (2001)10.1016/0003-2697(91)90534-Z
/ Anal Biochem by Guan K.L. (1991)10.1016/S0074-7696(08)61948-8
/ Int. Rev. Cytol. by Hamprecht B. (1977)10.1006/excr.2001.5368
/ Exp. Cell Res. by Hay J.C. (2001)10.1016/S0092-8674(00)80191-9
/ Cell by Hay J.C. (1997)10.1083/jcb.141.7.1489
/ J. Cell Biol. by Hay J.C. (1998)10.1046/j.1460-9568.2000.00076.x
/ Eur J. Neurosci. by Hirling H. (2000)10.1093/emboj/19.20.5288
/ EMBO J. by Ho Y.S. (2000)10.1073/pnas.96.7.3734
/ Proc. Natl. Acad. Sci. USA by Lafont F. (1999)10.1091/mbc.e02-04-0204
10.1091/mbc.8.12.2659
10.1083/jcb.149.4.889
/ J. Cell Biol. by Martinez-Arca S. (2000)10.1074/jbc.272.28.17776
/ J. Biol. Chem. by McNew J.A. (1997)10.1091/mbc.11.9.3137
10.1074/jbc.275.9.6523
/ J. Biol. Chem. by Nakamura N. (2000)10.1083/jcb.143.4.957
/ J. Cell Biol. by Prekeris R. (1998)10.1078/0171-9335-00109
/ Eur. J. Cell Biol. by Prekeris R. (2000)10.1091/mbc.10.11.3891
10.1016/S0896-6273(00)81177-0
/ Neuron by Scales S.J. (2000)10.1016/S0092-8674(00)80379-7
/ Cell by Scales S.J. (1997)10.1073/pnas.251547598
/ Proc. Natl. Acad. Sci. USA by Scales S.J. (2001)10.1074/jbc.274.41.28857
/ J. Biol. Chem. by Simonsen A. (1999)10.1083/jcb.137.4.835
/ J. Cell Biol. by Simpson F. (1997)10.1016/0092-8674(94)90270-4
/ Cell by Sogaard M. (1994)10.1038/362318a0
/ Nature by Sollner T. (1993)10.1091/mbc.11.8.2719
10.1038/26412
/ Nature by Sutton R.B. (1998)10.1126/science.1062950
/ Science. by Tochio H. (2001)10.1242/jcs.113.1.145
/ J. Cell Sci. by Tsui M.M. (2000)10.1083/jcb.145.7.1435
/ J. Cell Biol. by Ungermann C. (1999)10.1074/jbc.M010838200
/ J. Biol. Chem. by Wade N. (2001)10.1091/mbc.11.7.2327
10.1016/S0092-8674(00)81404-X
/ Cell by Weber T. (1998)10.1016/S0006-291X(88)81326-3
/ Biochem. Biophys. Res. Commun. by Witters L.A. (1988)10.1074/jbc.273.1.375
/ J. Biol. Chem. by Wong S.H. (1998)10.1074/jbc.M007684200
/ J. Biol. Chem. by Xu D. (2000)10.1074/jbc.274.9.5649
/ J. Biol. Chem. by Yang B. (1999)10.1091/mbc.9.9.2423
10.1074/jbc.M102786200
/ J. Biol. Chem. by Zhang T. (2001)
Dates
Type | When |
---|---|
Created | 22 years, 6 months ago (Feb. 14, 2003, 7:02 p.m.) |
Deposited | 4 years, 2 months ago (June 4, 2021, 2:13 p.m.) |
Indexed | 2 days, 19 hours ago (Aug. 20, 2025, 8:44 a.m.) |
Issued | 22 years, 6 months ago (Feb. 1, 2003) |
Published | 22 years, 6 months ago (Feb. 1, 2003) |
Published Print | 22 years, 6 months ago (Feb. 1, 2003) |
@article{Hasegawa_2003, title={Mammalian Ykt6 Is a Neuronal SNARE Targeted to a Specialized Compartment by its Profilin-like Amino Terminal Domain}, volume={14}, ISSN={1939-4586}, url={http://dx.doi.org/10.1091/mbc.e02-09-0556}, DOI={10.1091/mbc.e02-09-0556}, number={2}, journal={Molecular Biology of the Cell}, publisher={American Society for Cell Biology (ASCB)}, author={Hasegawa, Haruki and Zinsser, Sara and Rhee, Yeyoung and Vik-Mo, Einar Osland and Davanger, Svend and Hay, Jesse C.}, editor={Schekman, Randy W.}, year={2003}, month=feb, pages={698–720} }