Signal amplification in HL‐60 granulocytes
Signal amplification in HL‐60 granulocytes
复制标题
HL-60 粒细胞中的信号放大
DOI:
10.1111/j.1432-1033.1991.tb15964.x
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发表时间:
1991
期刊:
影响因子:
5.4
通讯作者:
K. Jakobs
中科院分区:
文献类型:
--
作者:
P. Gierschik;R. Moghtader;C. Straub;K. Dieterich;K. Jakobs
Receptors for the chemotactic peptide fMet-Leu-Phe (fMet, N-formylmethionine) are present in membranes of myeloid differentiated human leukemia (HL-60) cells and stimulate phospholipase C via a pertussis-toxin-sensitive guanine-nucleotide-binding regulatory protein(s) [G-protein(s)]. We have developed methods for the assessment of formyl-peptide-receptor-stimulated binding of radiolabeled guanosine 5′-[γ-thio]triphosphate ([35S]GTP[S]) to native HL-60 membranes. Agonist stimulation of [35S]GTP[S] association with the membrane was minimal ( 20%) when GTP[S] was the sole nucleotide present in the incubation medium. In contrast, receptor activation led to a marked (up to sixfold) stimulation of [35S]GTP[S] binding when GDP or GTP were present in high (> 100-fold) excess of [35S]GTP[S]. The increase in [35S]GTP[S] binding caused by the chemotactic agonist was strictly dependent on the presence of Mg2+ and was significantly increased by Na+. Agonist-independent binding of [35S]GTP[S] and the increase due to the chemotactic agonist were markedly attenuated by both pertussis and cholera toxin. Comparision of the number of chemotactic-peptide-sensitive [35S]GTP[S]-binding sites to the number of chemotactic peptide receptors present in HL-60 membranes provided direct evidence that a single formyl-peptide receptor is capable of catalyzing the binding of [35S]GTP[S] to, and thus the activation of, multiple (up to 20) G-proteins in native plasma membranes.
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DOI:
--
发表时间:
1990
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Linder,ME;Ewald,DA;Miller,RJ;Gilman,AG
通讯作者:
Gilman,AG
DOI:
--
发表时间:
1988
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Bokoch,GM;Parkos,CA;Mumby,SM
通讯作者:
Mumby,SM
DOI:
--
发表时间:
1987
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Higashijima,T;Ferguson,KM;Sternweis,PC
通讯作者:
Sternweis,PC
DOI:
--
发表时间:
1982
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Northup,JK;Smigel,MD;Gilman,AG
通讯作者:
Gilman,AG
DOI:
--
发表时间:
1983
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Fung,BK
通讯作者:
Fung,BK