Phosphorylation of Ykt6 SNARE Domain Regulates Its Membrane Recruitment and Activity.
Phosphorylation of Ykt6 SNARE Domain Regulates Its Membrane Recruitment and Activity.
复制标题
Ykt6SNARE结构域的磷酸化调节其膜的募集和活性。
DOI:
10.3390/biom10111560
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发表时间:
2020-11-16
期刊:
影响因子:
5.5
通讯作者:
Gross JC
中科院分区:
文献类型:
--
作者:
Karuna M P;Witte L;Linnemannstoens K;Choezom D;Danieli-Mackay A;Honemann-Capito M;Gross JC
Sensitive factor attachment protein receptors (SNARE) proteins are important mediators of protein trafficking that regulate the membrane fusion of specific vesicle populations and their target organelles. The SNARE protein Ykt6 lacks a transmembrane domain and attaches to different organelle membranes. Mechanistically, Ykt6 activity is thought to be regulated by a conformational change from a closed cytosolic form to an open membrane-bound form, yet the mechanism that regulates this transition is unknown. We identified phosphorylation sites in the SNARE domain of Ykt6 that mediate Ykt6 membrane recruitment and are essential for cellular growth. Using proximity-dependent labeling and membrane fractionation, we found that phosphorylation regulates Ykt6 conversion from a closed to an open conformation. This conformational switch recruits Ykt6 to several organelle membranes, where it functionally regulates the trafficking of Wnt proteins and extracellular vesicle secretion in a concentration-dependent manner. We propose that phosphorylation of its SNARE domain leads to a conformational switch from a cytosolic, auto-inhibited Ykt6 to an active SNARE at different membranes.
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DOI:
10.1083/jcb.201804028
发表时间:
2018-10-01
期刊:
The Journal of cell biology
影响因子:
--
作者:
Bas L;Papinski D;Licheva M;Torggler R;Rohringer S;Schuschnig M;Kraft C
通讯作者:
Kraft C
影响因子:
48
作者:
Gibson, Daniel G.;Young, Lei;Smith, Hamilton O.
通讯作者:
Smith, Hamilton O.
影响因子:
16.8
作者:
Akimov, Vyacheslav;Barrio-Hernandez, Inigo;Blagoev, Blagoy
通讯作者:
Blagoev, Blagoy
影响因子:
48
作者:
Boncompain, Gaelle;Divoux, Severine;Perez, Franck
通讯作者:
Perez, Franck
影响因子:
4.6
作者:
Linnemannstoens, Karen;Witte, Leonie;Gross, Julia Christina
通讯作者:
Gross, Julia Christina