Genomic and gene regulatory signatures of cryptozoic adaptation: Loss of blue sensitive photoreceptors through expansion of long wavelength-opsin expression in the red flour beetle Tribolium castaneum.
Genomic and gene regulatory signatures of cryptozoic adaptation: Loss of blue sensitive photoreceptors through expansion of long wavelength-opsin expression in the red flour beetle Tribolium castaneum.
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DOI：
10.1186/1742-9994-4-24
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发表时间：
2007-12-21
影响因子：
2.8
通讯作者：
Friedrich M
中科院分区：
文献类型：
--
作者：
Jackowska M;Bao R;Liu Z;McDonald EC;Cook TA;Friedrich M
最近在红粉甲虫赤拟谷盗的基因组序列分析表明，这种高度黄昏动物编码只有两个单一的视蛋白旁系同源物：紫外线-视蛋白和长波长（LW）-视蛋白，然而，这些动物不编码蓝色（B）-视蛋白作为大多数其他昆虫。在这里，我们研究了空间调节的拟谷盗单LW-和UV-视蛋白基因旁系同源物相比，在视网膜中的果蝇的五个视蛋白旁系同源物。原位杂交分析表明，赤拟谷盗视网膜，与其他昆虫视网膜相比，构成了一个均匀的领域的小眼，有7个LW-视蛋白表达光感受器和一个UV-/LW-视蛋白共表达光感受器每个眼睛单位。这种模式与对蓝色波长敏感的光感受器的损失一致。它还将赤拟谷盗鉴定为昆虫中第一个在整个视网膜上共表达两种不同视蛋白的物种，违反了广泛观察到的感觉细胞的“一个受体规则”。对暗甲虫和其他鞘翅目昆虫视蛋白进化的更广泛研究有可能查明在赤拟谷盗视觉进化中发挥作用的许可和适应力量。
Recent genome sequence analysis in the red flour beetle Tribolium castaneum indicated that this highly crepuscular animal encodes only two single opsin paralogs: a UV-opsin and a long wavelength (LW)-opsin; however, these animals do not encode a blue (B)-opsin as most other insects. Here, we studied the spatial regulation of the Tribolium single LW- and UV-opsin gene paralogs in comparison to that of the five opsin paralogs in the retina of Drosophila melanogaster. In situ hybridization analysis reveals that the Tribolium retina, in contrast with other insect retinas, constitutes a homogenous field of ommatidia that have seven LW-opsin expressing photoreceptors and one UV-/LW-opsin co-expressing photoreceptor per eye unit. This pattern is consistent with the loss of photoreceptors sensitive to blue wavelengths. It also identifies Tribolium as the first example of a species in insects that co-expresses two different opsins across the entire retina in violation of the widely observed "one receptor rule" of sensory cells. Broader studies of opsin evolution in darkling beetles and other coleopteran groups have the potential to pinpoint the permissive and adaptive forces that played a role in the evolution of vision in Tribolium castaneum.
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影响因子：
10.5
作者：
FORTINI, ME;RUBIN, GM
通讯作者：
RUBIN, GM
影响因子：
16.2
作者：
Chou, WH;Hall, KJ;Britt, SG
通讯作者：
Britt, SG
影响因子：
3.5
作者：
Huber, A;Schulz, S;Paulsen, R
通讯作者：
Paulsen, R
DOI：
10.1007/bf00302998
发表时间：
1967-01-01
期刊：
ZEITSCHRIFT FUR VERGLEICHENDE PHYSIOLOGIE
影响因子：
--
作者：
GOGALA, M
通讯作者：
GOGALA, M
影响因子：
64.5
作者：
Mikeladze-Dvali, T;Wernet, MF;Desplan, C
通讯作者：
Desplan, C