Regulation of Ras-GAP and the neurofibromatosis-1 gene product by eicosanoids.
Regulation of Ras-GAP and the neurofibromatosis-1 gene product by eicosanoids.
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类花生酸对 Ras-GAP 和神经纤维瘤病-1 基因产物的调节。
DOI:
10.1126/science.1902323
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发表时间:
1991
期刊:
影响因子:
--
通讯作者:
Macara,IG
中科院分区:
文献类型:
--
作者:
Han,JW;McCormick,F;Macara,IG
Ras-GAP (GTPase activating protein) is a regulatory protein that stimulates the intrinsic guanosine triphosphatase (GTPase) activity of the proto-oncogene product p21ras. A domain of the neurofibromatosis gene product (NF1) that has sequence similarity to the catalytic domain of Ras-GAP and to yeast IRA gene products also has a specific stimulatory activity toward p21rasGTPase. Arachidonic acid and phosphatidic acid inactivate GAP, but no agents have been identified that stimulate GAP and thereby switch p21rasoff. With the use of recombinant Ha-c-Ras and Ras-GAP, NF1, and GAP catalytic domains, it was found that prostaglandins PGF2αand PGA2stimulated Ras-GAP and that prostacyclin PGI2inhibited Ras-GAP. The stimulatory effect of PGF2αwas saturable and structure-specific and competed with the inhibitory effect of arachidonic acid. Arachidonic acid also inhibited the catalytic activity of NF1, but prostaglandins were not stimulatory. These results suggest a mechanism for the allosteric control of Ras function through the modulation of arachidonate metabolism.
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DOI:
10.1073/pnas.87.9.3373
发表时间:
1990-05
影响因子:
11.1
作者:
Jiawen Han;H. Sadowski;D. Young;I. Macara
通讯作者:
Jiawen Han;H. Sadowski;D. Young;I. Macara
DOI:
10.1016/s0021-9258(18)45826-7
发表时间:
1990
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
R. Halenbeck;W. J. Crosier;R. Clark;F. McCormick;K. Koths
通讯作者:
K. Koths
DOI:
10.1126/science.2237442
发表时间:
1990
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Tsai,MH;Yu,CL;Stacey,DW
通讯作者:
Stacey,DW
影响因子:
56.9
作者:
Frech, M;John, J;Wittinghofer, A
通讯作者:
Wittinghofer, A
影响因子:
56.9
作者:
WALLACE, MR;MARCHUK, DA;COLLINS, FS
通讯作者:
COLLINS, FS