The majority of prophenoloxidase in the hemolymph of Manduca sexta is present in the plasma and not in the hemocytes.

The majority of prophenoloxidase in the hemolymph of Manduca sexta is present in the plasma and not in the hemocytes.
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烟草天蛾血淋巴中的大部分酚氧化酶原存在于血浆中,而不是存在于血细胞中。

DOI:
10.1016/0145-305x(87)90037-1
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发表时间:
1987
影响因子:
2.9
通讯作者:
Sugumaran,M
Sugumaran,M
中科院分区:
生物学3区
文献类型:
--
作者:
Saul,SJ;Bin,L;Sugumaran,M

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酚氧化酶在保护昆虫免受入侵微生物和寄生虫侵袭方面的重要性是有据可查的(1-3)。酚氧化酶通常以酶原形式存在于昆虫血淋巴中,并被有限的蛋白水解酶激活(4-7)。活性酶催化黑色素在异物周围的沉积。因此,观察到细菌细胞壁制剂和~-L、3-葡聚糖介导的酚氧化酶原激活与其参与昆虫防御反应一致(8-10)。鉴于这种关键功能,了解这种酶在血淋巴中的定位是很重要的。早期Pye(9)和Evans(II)的研究表明,该酶存在于梅氏Galeria mellonella和Antheraea pernyi幼虫的血淋巴血浆中。Ashida对家蚕幼虫也报告了类似的结果(I0)。另一方面,Leonard等人(12)最近声称该酶主要定位在血细胞中,而不是在布拉伯斯牛的血浆中。本实验室一直在研究六叶树(Manduca Sexta)(13-15)酚氧化酶原激活的调控机制。因此,我们研究了这种酶在五龄幼虫血淋巴中的区划,并在这次通讯中报告,大部分酚氧化酶原存在于血浆中,而只有一小部分存在于六纹夜蛾的血细胞中。
The importance of phenoloxidase in protection of insects against invading microorganisms and parasites is well documented (1-3). Phenoloxidase is usually present in insect hemolymph as a proenzyme form and is activated by limited proteolysis (4-7). The active enzyme catalyzes the deposition of melanin pigments around the foreign objects. Accordingly, observed prophenoloxidase activation mediated by bacterial cell wall preparations and~-l, 3-glucans is consistent with its participation in defense reactions of insects (8-10). Given such a key function, it is important to know the localization of this enzyme in the hemolymph. Earlier studies by Pye (9) as well as Evans (Ii) indicated the presence of this enzyme in the hemolymph plasma of Galleria mellonella and Antheraea pernyi larvae. Similar results have been reported by Ashida with silkworm Bombyx mori larvae also (I0). On the other hand, Leonard, et al.(12) have recently claimed that this enzyme is mainly localized in the hemocytes and not in the plasma of Blaberus craniifer. Our laboratory has been studying the control mechanisms involved in the activation of prophenoloxidase in Manduca sexta (13-15). Hence, we examined the compartmentalization of this enzyme in the hemolymph of fifth instar larvae and report in this communication, that the majority of prophenoloxidase is present in the plasma and only a minor fraction in the hemocytes of Manduca sexta.
布拉贝鲁斯红细胞血细胞酚氧化酶原和蛋白酶活性的研究
DOI: --
发表时间: 1985
期刊:
影响因子: --
作者:
C. Léonard;K. Söderhäll;N. Ratcliffe
通讯作者: N. Ratcliffe
血淋巴原酪氨酸酶和天蛾 (L.) 角质层激活剂的表征
DOI: --
发表时间: 1985
期刊:
影响因子: --
作者:
Y. Aso;K. Kramer;T. L. Hopkins;G. Lookhart
通讯作者: G. Lookhart
DOI: --
发表时间: 1987
期刊:
影响因子: --
作者:
S. Saul;M. Sugumaran
通讯作者: M. Sugumaran
DOI: --
发表时间: 1973
影响因子: 3.9
作者:
K. Dohke
通讯作者: K. Dohke
DOI: --
发表时间: 1967
期刊:
影响因子: --
作者:
Jeremy J. T. Evans
通讯作者: Jeremy J. T. Evans