Dynamic expression of ancient and novel molluscan shell genes during ecological transitions.
Dynamic expression of ancient and novel molluscan shell genes during ecological transitions.
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DOI：
10.1186/1471-2148-7-160
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发表时间：
2007-09-10
影响因子：
3.4
通讯作者：
Degnan BM
中科院分区：
文献类型：
--
作者：
Jackson DJ;Wörheide G;Degnan BM
软体动物是形态和生态最多样化的后生动物门之一，占据了广泛的海洋，陆地和淡水栖息地。软体动物的进化成功可以部分归因于外壳的可进化性。通常，贝壳首先在胚胎和幼虫发育期间形成，随着发育和成熟的进行，形状，颜色和矿物成分发生显着变化。贝壳形态的主要发育转变往往与生态转变有关（例如在变态时从浮游生物转变为底栖生物）。虽然参与软体动物生物矿化的基因开始被识别，但对这些基因是如何发育调节的，或者相同的基因是否在软体动物生命的不同阶段起作用，还知之甚少。在这里，我们涉及到九个基因的发育表达的组织负责壳生产-地幔-生态转变发生在热带鲍鱼的一生中的驴（Vetigastropoda）。其中四个基因编码进化上古老的蛋白质，而另外四个基因编码与已知蛋白质几乎没有或没有同一性的分泌蛋白质。另一个基因先前已被描述来自另一种盐藻的外套膜。所有9个基因显示动态的空间和时间内的幼虫壳场和少年地幔的表达谱。这些表达数据反映了从幼虫阶段到成年期的软体动物壳结构的监管复杂性，并突出了每个阶段的不同生态需求。在贝壳构建的各个阶段都使用了古老和新的基因，这也表明，一组核心的贝壳制造基因是由一个共同的后生动物祖先提供的，这一祖先已经被详细阐述，以产生我们今天看到的一系列软体动物贝壳类型。
The Mollusca constitute one of the most morphologically and ecologically diverse metazoan phyla, occupying a wide range of marine, terrestrial and freshwater habitats. The evolutionary success of the molluscs can in part be attributed to the evolvability of the external shell. Typically, the shell first forms during embryonic and larval development, changing dramatically in shape, colour and mineralogical composition as development and maturation proceeds. Major developmental transitions in shell morphology often correlate with ecological transitions (e.g. from a planktonic to benthic existence at metamorphosis). While the genes involved in molluscan biomineralisation are beginning to be identified, there is little understanding of how these are developmentally regulated, or if the same genes are operational at different stages of the mollusc's life. Here we relate the developmental expression of nine genes in the tissue responsible for shell production – the mantle – to ecological transitions that occur during the lifetime of the tropical abalone Haliotis asinina (Vetigastropoda). Four of these genes encode evolutionarily ancient proteins, while four others encode secreted proteins with little or no identity to known proteins. Another gene has been previously described from the mantle of another haliotid vetigastropod. All nine genes display dynamic spatial and temporal expression profiles within the larval shell field and juvenile mantle. These expression data reflect the regulatory complexity that underlies molluscan shell construction from larval stages to adulthood, and serves to highlight the different ecological demands placed on each stage. The use of both ancient and novel genes in all stages of shell construction also suggest that a core set of shell-making genes was provided by a shared metazoan ancestor, which has been elaborated upon to produce the range of molluscan shell types we see today.
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影响因子：
3
作者：
Jolly, C;Berland, S;Doumenc, D
通讯作者：
Doumenc, D
影响因子：
2.5
作者：
Counihan, RT;McNamara, DC;Degnan, BM
通讯作者：
Degnan, BM
影响因子：
56.9
作者：
Jackson, Daniel J.;Macis, Luciana;Woerheide, Gert
通讯作者：
Woerheide, Gert
影响因子：
3.2
作者：
GABBIANI, G;TUCHWEBER, B
通讯作者：
TUCHWEBER, B
影响因子：
2.9
作者：
Hickman, CS
通讯作者：
Hickman, CS