Sequential regulation of DOCK2 dynamics by two phospholipids during neutrophil chemotaxis.
Sequential regulation of DOCK2 dynamics by two phospholipids during neutrophil chemotaxis.
复制标题
DOI:
10.1126/science.1170179
复制
发表时间:
2009-04-17
期刊:
影响因子:
--
通讯作者:
Fukui Y
中科院分区:
文献类型:
--
作者:
Nishikimi A;Fukuhara H;Su W;Hongu T;Takasuga S;Mihara H;Cao Q;Sanematsu F;Kanai M;Hasegawa H;Tanaka Y;Shibasaki M;Kanaho Y;Sasaki T;Frohman MA;Fukui Y
During chemotaxis, activation of the small guanosine triphosphatase Rac is spatially regulated to organize the extension of membrane protrusions in the direction of migration. In neutrophils, Rac activation is primarily mediated by DOCK2, an atypical guanine nucleotide exchange factor. Upon stimulation, we found that DOCK2 rapidly translocated to the plasma membrane in a phosphatidylinositol 3,4,5-trisphosphate–dependent manner. However, subsequent accumulation of DOCK2 at the leading edge required phospholipase D–mediated synthesis of phosphatidic acid, which stabilized DOCK2 there by means of interaction with a polybasic amino acid cluster, resulting in increased local actin polymerization. When this interaction was blocked, neutrophils failed to form leading edges properly and exhibited defects in chemotaxis. Thus, intracellular DOCK2 dynamics are sequentially regulated by distinct phospholipids to localize Rac activation during neutrophil chemotaxis.
登录
查看更多内容
影响因子:
56.9
作者:
Fang, YM;Vilella-Bach, M;Chen, J
通讯作者:
Chen, J
DOI:
10.1083/jcb.200104019
发表时间:
2001-08-06
期刊:
The Journal of cell biology
影响因子:
--
作者:
Santy LC;Casanova JE
通讯作者:
Casanova JE
影响因子:
21.3
作者:
Côté, JF;Motoyama, AB;Vuori, K
通讯作者:
Vuori, K
影响因子:
56.9
作者:
Loewen, CJR;Gaspar, ML;Levine, TP
通讯作者:
Levine, TP
影响因子:
3.3
作者:
Du, GW;Huang, P;Frohman, MA
通讯作者:
Frohman, MA