Identification and distribution of products from novel tryptopyrokinin genes in the locust, Locusta migratoria.

Identification and distribution of products from novel tryptopyrokinin genes in the locust, Locusta migratoria.
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蝗虫新色氨酸激肽基因产物的鉴定和分布

DOI:
10.1016/j.bbrc.2017.02.135
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发表时间:
2017
影响因子:
3.1
通讯作者:
Predel R
Predel R
中科院分区:
生物学4区
文献类型:
--
作者:
Redeker J;Bläser M;Neupert S;Predel R

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最近对飞蝗基因组的分析表明,存在四种新的昆虫神经肽基因,编码多种酪氨酸激酶肽(tryptoPKs);迄今为止只知道从酪氨酸激酶或capagenes。在我们的研究中,成熟产品的tryptoPK基因1和2的质谱鉴定,前体序列分配给thetyptoPK基因3和4可能是一个单一的前体的部分序列。胰蛋白酶PK基因1和2的表达仅限于食管下神经节的两个细胞,不仅表现出独特的神经肽组,而且还表现出非常独特的轴突投射。比较神经内分泌学显示,其他昆虫的同源细胞也产生胰蛋白激酶,但使用其他基因来产生这种模式。由于capa和pyrokiningenes被认为是胰蛋白酶PK基因的祖先,我们通过转录组分析完成了迄今为止仅部分已知的这些基因的前体序列。CAPA和pyrokinin前体的成熟产物在CNS中的分布与tryptoPKs的分布进行了比较。此外,还描述了一种新的类焦激肽前体。
A recent analysis of the genome ofLocusta migratoriaindicated the presence of four novel insect neuropeptide genes encoding for multiple tryptopyrokinin peptides (tryptoPKs); hitherto only known frompyrokininorcapagenes. In our study, mature products oftryptoPKgenes 1 and 2 were identified by mass spectrometry; precursor sequences assigned to thetryptoPKgenes 3 and 4 are likely partial sequences of a single precursor. The expression oftryptoPKgenes 1 and 2 is restricted to two cells in the subesophageal ganglion, exhibiting not only a unique neuropeptidome but also a very distinctive axonal projection. Comparative neuroendocrinology revealed that homologous cells in other insects also produce tryptoPKs but use other genes to generate this pattern. Sincecapaandpyrokiningenes are discussed as ancestors of thetryptoPKgenes, we completed the hitherto only partially known precursor sequences of these genes by means of transcriptome analyses. The distribution of mature products of CAPA and pyrokinin precursors in the CNS is compared with that of tryptoPKs. In addition, a novel pyrokinin-like precursor is described.
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