Bdh1l基因表达是类鱼类基于胡卜素的色彩多样性的潜在分子因素
Pooja Singh1,2, Angelika Ziegelbecker3, Christoph Hahn3
1Aquatic Ecology & Evolution Division, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland.
Molecular ecology
|August 20, 2025
概括
这项研究显示,3-基酸脱酶1型 (bdh1l) 基因可能作为鱼中胡卜素颜色变化的分子开关. bdh1l和hsd3b基因的差异表达分别与红色和黄色有关.
科学领域:
- 进化生物学
- 分子遗传学
- 生物化学
背景情况:
- 胡卜素对于动物的色彩至关重要,但红色和黄色色调之间的进化转变的分子基础仍然未被探索.
- 鱼提供了复制色彩变化的模型系统,用于研究基于胡卜素的色彩进化.
研究的目的:
- 调查红色与黄色胡卜素颜色差异的生物化学和遗传机制.
- 鉴定不同类素生物合成中的关键基因和途径.
主要方法:
- 在红色鱼皮肤中分析氨酸蛋白质.
- 使用改进的生物信息管道对红色和黄色虫皮肤的RNA测序数据进行重新分析.
- 在三对密切相关的类物种中进行基因表达比较分析.
主要成果:
- 红色皮肤样本含有基托胡卜素,包括罗多桑丁,康塔桑丁和阿斯塔.
- 在所有研究的分类对中,红色与黄色皮肤中观察到显著更高的3-基甲酸脱酶1型 (bdh1l) 和其他与胡卜素相关的基因 (scarb1,bco2,ttc39b).
- 在细胞染色体P450基因表达中没有发现一致的差异,这表明bdh1l调节对C4-基托卡罗类生物合成至关重要.
- 这种hsd3b的差异表达表明它可能在rhodoxanthin生物合成中发挥作用,而这与其他类胡卜素有着不同的作用.
结论:
- 调节bdh1l表达可以作为C4-基托卡洛化物生物合成和鱼的颜色分化中的分子开关.
- 这些发现突显了特定脱酶在胡卜素路径进化和颜色多样化中的作用.
- 不同的基因机制可能是不同类型的胡卜素的生物合成的基础,例如rodoxanthin与其他类胡卜素.
相关概念视频
01:11Genetic Lingo
104.5K
Overview
104.5K
02:27Background and Environment Affect Phenotype
6.7K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
6.7K
02:32Position-effect Variegation
6.5K
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.
6.5K
01:39Epistasis
47.6K
In addition to multiple alleles at the same locus influencing traits, numerous genes or alleles at different locations may interact and influence phenotypes in a phenomenon called epistasis. For example, rabbit fur can be black or brown depending on whether the animal is homozygous dominant or heterozygous at a TYRP1 locus. However, if the rabbit is also homozygous recessive at a locus on the tyrosinase gene (TYR), it will have an unshaded coat that appears white, regardless of its TYRP1...
47.6K
02:37Gene Duplication and Divergence
6.3K
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
6.3K
01:43Incomplete Dominance
25.4K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
25.4K