丝虫假基因的时空表达特征为它们的生物学作用提供了宝贵的见解
Linrong Wan1,2, Siyuan Su1, Jinyun Liu3,4
1Sericultural Research Institute, Sichuan Academy of Agricultural Sciences, Nanchong, Sichuan, China.
Evolutionary bioinformatics online
|June 17, 2024
概括
这项研究确定了4410个丝虫伪基因,揭示了它们在丝腺发育和功能中的作用. 这些伪基因,包括3299个lncRNAs,对于理解丝虫的基因调节至关重要.
科学领域:
- 基因组学就是基因组学.
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- 伪基因曾经被认为是进化遗迹,现在被认为具有重要的生物学作用.
- 对丝虫伪基因的研究是有限的,之前的研究集中在单个基因上.
研究的目的:
- 对丝虫中的伪基因进行全面的全基因组调查.
- 描述丝虫伪基因的表达模式和功能意义.
主要方法:
- 用丝虫基因组组,转录组和蛋白质序列对伪基因进行全基因组识别.
- 通过对832个RNA-seq数据集的分析进行时空表达特征分析.
- 鉴定组织特异性和差异表达的伪基因,并分析伪基因衍生 lncRNAs.
主要成果:
- 4410个伪基因被确定并分为重复,单元,加工 (回形伪基因) 和碎片.
- 伪基因表达分为高度表达和低表达的组,后面的丝腺表现出最具组织特异性的伪基因.
- 确定了3299个lncRNAs,其中的目标基因富含卵形成和嗅觉功能.
结论:
- 这项研究增强了丝虫基因组注释,并为伪基因功能提供了关键的见解.
- 这些发现有助于理解丝虫基因调节网络,并可能对其他物种产生更广泛的影响.
相关概念视频
Reporter Genes
11.3K
Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
11.3K
Position-effect Variegation
6.3K
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.
6.3K
Pleiotropy
40.4K
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
40.4K
Cis-regulatory Sequences
9.8K
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
9.8K
Ribosome Profiling
3.5K
Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
3.5K
Exon Recombination
3.6K
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon...
Exon shuffling follows “splice frame rules.” Each exon...
3.6K


