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内甲素受体B的DNA甲基化使蓝鱼变成黄色

Wei Fang^1,2, Danielle Blakkan³, Alexandra Byrne³

¹Department of Biology, Queens College, City University of New York, Flushing, NY, USA.

Nature communications

|December 7, 2025

概括

阿斯塔托蒂拉皮亚伯托尼鱼通过调节内分泌素受体B (EdnRBa) mRNA来改变颜色. EdnRBa的DNA高甲基化控制着色素聚合,使表型可塑性的颜色变化成为可能.

科学领域:

动物颜色动物的颜色.
分子生物学分子生物学
遗传学遗传学是一个

背景情况:

动物的色素对生存和沟通至关重要.
现型可塑性允许个体适应颜色的环境.
阿斯塔托蒂拉皮亚·布尔托尼鱼在蓝色和黄色之间呈现颜色变化.

研究的目的:

为了研究阿斯塔托蒂拉皮亚burtoni的颜色变化背后的分子机制.
确定涉及表型可塑性的基因和调节过程.

主要方法:

分析基因表达的变化,以应对视觉环境.
研究基因促进体中的DNA甲基化模式.
功能性测试以确定特定基因在色素聚合中的作用.

主要成果:

阿斯塔托蒂拉皮亚伯托尼通过降低内分泌素受体B (EdnRBa) mRNA的调节而从黄色转变为蓝色.
在EdnRBa促进体中的特定细胞因子残留处的DNA高甲基化驱动了这种下调.
黄色染色体中的EdnRBa信号促进了色素聚合,减少了黄色的可见性.

结论:

通过DNA甲基化对EdnRBa的调节是Astatotilapia burtoni颜色可塑性的关键机制.
这种表观遗传机制允许色素迅速适应视觉线索.
这些发现提供了关于脊椎动物表型可塑性的遗传和表观遗传基础的见解.

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Position-effect Variegation

Position-effect Variegation

In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.