Reticulon short hairpin transmembrane domains are used to shape ER tubules.
Reticulon short hairpin transmembrane domains are used to shape ER tubules.
复制标题
DOI:
10.1111/j.1600-0854.2010.01134.x
复制
发表时间:
2011-01
期刊:
影响因子:
--
通讯作者:
Voeltz G
中科院分区:
文献类型:
--
作者:
Zurek N;Sparks L;Voeltz G
Reticulons are integral membrane proteins that partition into and shape the tubular endoplasmic reticulum (ER). We propose that reticulons use a membrane-insertion mechanism to generate regions of high membrane curvature in the ER. Reticulon contains two short hairpin transmembrane domains (TMD), which could generate membrane curvature by increasing the area of the cytoplasmic leaflet. Here, we test whether the short length of these hairpin TMDs is required for reticulon membrane-shaping functions in mammalian cells. We lengthened the TMDs of Reticulon 4 to resemble a typical bi-pass TMD that spans both leaflets. We find that TMD mutants oligomerize like wt, however they are not immobilized, do not partition into tubules, do not constrict tubules, and no longer suppress peripheral ER cisternae. Therefore, short hairpin TMD length is required for reticulon protein partitioning and membrane shaping functions. Another membrane protein with a short hairpin TMD is caveolin. We demonstrate that an ER-retained caveolin construct also partitions within the ER in a manner that is dependent on it containing a short hairpin TMD. These data suggest that a short hairpin TMD may be a general feature used by membrane-shaping proteins to partition into and shape regions of high membrane curvature.
登录
查看更多内容
DOI:
10.1083/jcb.148.1.17
发表时间:
2000-01-10
期刊:
The Journal of cell biology
影响因子:
--
作者:
Machleidt T;Li WP;Liu P;Anderson RG
通讯作者:
Anderson RG
DOI:
10.1083/jcb.200907074
发表时间:
2009-11-16
期刊:
The Journal of cell biology
影响因子:
--
作者:
Schuck S;Prinz WA;Thorn KS;Voss C;Walter P
通讯作者:
Walter P
影响因子:
64.5
作者:
Lee, MCS;Orci, L;Schekman, R
通讯作者:
Schekman, R
DOI:
10.1073/pnas.172196599
发表时间:
2002-08-20
影响因子:
11.1
作者:
Fernandez, I;Ying, YS;Anderson, RGW
通讯作者:
Anderson, RGW
影响因子:
11.4
作者:
Gallop, Jennifer L.;Jao, Christine C.;T McMahon, Harvey
通讯作者:
T McMahon, Harvey