相关实验视频
Updated: May 10, 2026
22:27
Hi-C: A Method to Study the Three-dimensional Architecture of Genomes.
Published on: May 6, 2010
408.9K
可扩展的无成像空间基因组学通过计算重建
Chenlei Hu1,2, Mehdi Borji1, Giovanni J Marrero1
1Broad Institute of Harvard and MIT, Cambridge, MA, USA.
bioRxiv : the preprint server for biology
|August 16, 2024
概括
这项研究引入了一种无成像的空间转录组学方法,使用分子扩散来计算重建细胞位置. 这种可访问的技术使得可扩展的,高分辨率的空间基因组学数据生成没有专门的设备.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 生物信息学是一种生物信息学.
背景情况:
- 组织组织依赖于协调的细胞分子程序.
- 空间基因组学在组织背景下绘制细胞活动的地图.
- 现有的空间基因组学方法通常需要专门的设备,并且规模有限.
研究的目的:
- 开发一种可访问,可扩展,无成像的空间转录学方法.
- 用分子扩散模式计算重建空间数据.
- 克服当前基于成像的空间基因组学技术的局限性.
主要方法:
- 在二维条码数组上使用简单的实验协议,通过分子扩散建立条码相互作用.
- 测序的相互作用生成一个高维矩阵.
- 应用缩小维度 (UMAP) 来计算地重建空间位置.
主要成果:
- 成功地使用分子扩散模式和UMAP重建空间数据.
- 与Slide-seq和Slide-tags.com等现有方法证明了兼容性和高保真性.
- 在大面积 (高达1.2厘米) 上实现了高分辨率的空间重建.
结论:
- 开发的计算方法使可访问和可扩展的空间转录学成为可能.
- 这种无成像的方法产生了高质量的空间基因组学数据.
- 分子扩散模式可以被利用来推断空间组织.
相关概念视频
03:21Genome Size and the Evolution of New Genes
While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
02:54Evolutionary Relationships through Genome Comparisons
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
02:37Gene Duplication and Divergence
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 characterized.
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 characterized.
03:36Genome Annotation and Assembly
The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.
02:46Genetic Screens
Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which result in visible changes...
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which result in visible changes...
03:21Genome Size and the Evolution of New Genes
While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.