Genomic and cDNA sequence of prophenoloxidases from Drosophila melanogaster.

Genomic and cDNA sequence of prophenoloxidases from Drosophila melanogaster.
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果蝇酚氧化酶原的基因组和 cDNA 序列。

DOI:
10.1007/978-1-4615-1291-2_34
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发表时间:
2001
影响因子:
--
通讯作者:
Sugumaran,M
Sugumaran,M
中科院分区:
医学4区
文献类型:
--
作者:
Chase,MR;Sugumaran,M

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酚氧化酶(Phenoloxidase,PO)是一种与昆虫三大生理生化过程相关的重要酶。第一个过程,即,角质层硬化,通过使角质层硬化,确保保护软体昆虫免受其捕食者和猎物以及干燥的伤害(Andersenet al.,1996; Sugumaran 1991; 1998)。在硬化过程中,PO生成的醌既作为硬化剂又作为产生醌甲基化物的醌异构酶的底物(Sugumaran,1998;扫罗& Sugumaran 1988,1989 a,B,1990,里基茨& Sugumaran 1994)。醌和醌甲基化物与表皮结构组分的反应,几丁质和蛋白质导致角质层硬化(Andersenet al.,1996; Sugumaran 1991,1998)。在第二个过程中,在其他宿主防御反应中,建立成功进入昆虫血细胞的生物体面临PO的可怕作用,其导致黑色素在入侵者周围沉积(Ashida & Brey 1995; Gillespieet al.,1997>; Nappi & Sugumaran 1993; Soderhall等人,1990; Sugumaran,1996; Sugumaran & Kanost,1993)。虽然入侵者可能仍然生活在黑色素囊内,但它的繁殖和破坏宿主的能力受到黑色素囊的极大阻碍。最后,在创伤期间,昆虫血淋巴的损失被创伤部位的快速沉积黑色素阻止(Lai-Fook,1966; Sugumaran,1996)。除了密封伤口之外,PO作用还可以提供细胞毒性醌类,其可以伤害机会性侵入的微生物(Nappi & Sugumaran 1993; >Sugumaran 1996)。
Phenoloxidase (PO) is an important enzyme associated with the biochemistry of three physiologically important processes in insects. The first process,viz., cuticular sclerotization, ensures the protection of the soft bodied insects from their predators and preys as well as from desiccation by hardening the cuticle (Andersenet al.,1996; Sugumaran 1991; 1998). During sclerotization, PO generated quinones serve both as sclerotizing agents and as substrates for quinone isomerases that produce quinone methides (Sugumaran, 1998; Saul & Sugumaran 1988, 1989 a,b,1990, Ricketts & Sugumaran 1994). The reactions of quinones and quinone methides with cuticular structural componentsviz., chitin and proteins, lead to the hardening of cuticle (Andersenet al., 1996; Sugumaran 1991, 1998). In the second process, organisms establishing successful entry into the insect hemocel face among other host defense reactions, the dreaded action of PO, which causes deposition of melanin pigment around the intruder (Ashida & Brey 1995; Gillespieet al., 1997>; Nappi & Sugumaran 1993; Soderhall,et al., 1990; Sugumaran, 1996; Sugumaran & Kanost, 1993). While the intruder may still live in side the melanotic encapsule, its ability to multiply and damage the host is dramatically hindered by the melanotic capsule. Finally during wounding, loss of insect hemolymph is arrested by the rapid deposition melanin at the wounding site (Lai-Fook, 1966; Sugumaran, 1996). Apart from sealing the wound, PO action may also provide cytotoxic quinones that could harm the opportunistically invading microorganism (Nappi & Sugumaran 1993; >Sugumaran 1996).
第 14 章 - 昆虫血淋巴酚氧化酶的调节
DOI: 10.1016/b978-0-08-091649-1.50019-0
发表时间: 1993
期刊: Archives internationales de physiologie, de biochimie et de biophysique
影响因子: --
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DOI: --
发表时间: 1997
期刊: Springer US
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作者:
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DOI: --
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期刊: The Journal of biological chemistry
影响因子: --
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DOI: --
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