相关实验视频
Updated: Feb 27, 2026

10:36
Rare Event Detection Using Error-corrected DNA and RNA Sequencing
Published on: August 3, 2018
12.6K
从基因组学到结构:通过LOOCV验证的集体学习,TP53DNA结合核心中的进化和临床信号
Syed Raza Abbas1, Zeeshan Abbas1,2, Arifa Zahir3
1Department of Precision Medicine, Sungkyunkwan University, School of Medicine, Suwon 16419, Republic of Korea.
Briefings in bioinformatics
|February 26, 2026
概括
了解TP53瘤抑制剂的进化约束是解释其致病变体的关键. 这项研究通过整合进化基因组学,结构生物学和临床数据来确定关键的TP53残留物,包括代码子129和残留物239-248.
科学领域:
- 进化基因组学是进化的基因组学.
- 结构生物学是结构生物学.
- 癌症基因组学 癌症基因组学
背景情况:
- TP53是一种关键的瘤抑制基因.
- 了解TP53的进化约束对于解释致病变体及其临床意义至关重要.
- 识别功能关键残留物有助于了解癌症的发展和潜在的治疗策略.
研究的目的:
- 系统地优先考虑TP53基因中的功能关键残留物.
- 整合进化基因组信号,结构信息和临床变异数据.
- 开发一个可通用的计算框架,用于癌症基因的残留水平优先级.
主要方法:
- 在19个脊椎动物中使用固定效应概率和快速不受约束的贝叶斯近似来进行全基因组对齐和家族遗传学估计.
- 将进化选择信号映射到AlphaFold预测的TP53结构上.
- 将ClinVar和UniProt的人类变体数据与结构和进化信息相结合.
- 机器学习验证使用一次性交叉验证 (LOOCV) 进行预测性绩效评估.
主要成果:
- 在积极或多样化选择下确定了五个TP53位点,通过多种方法始终检测到人类代码子129.
- 致病变体聚集在DNA结合接口,其残留239-248被确定为主要致病热点.
- 一个综合评分系统整合了进化约束,病原负担和域重要性,有效地优先考虑了关键残留物.
- 机器学习模型表现出强大的预测性能,集体方法在族系学距离回归和类别分类中实现了高精度.
结论:
- 进化信号和临床变异汇聚在TP53.3的DNA结合核心中.
- Codon 129 是一个重要的阳性选择地点,而残留物239-248 代表了一个主要的病原热点.
- 开发的基于AlphaFold的LOOCV验证框架为残留物优先排序提供了一个系统的方法.
- 这一框架可以指导机理学研究,并为等待实验验证的精密瘤学应用提供信息.
相关概念视频
Modern Molecular Taxonomy
775
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
775
Phylogeny
63.6K
Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
63.6K
Evolutionary Relationships through Genome Comparisons
7.1K
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...
7.1K
Applications of Molecular Taxonomy
630
Molecular taxonomy has revolutionized the understanding and classification of bacteria, providing precise insights into their diversity, evolutionary relationships, and ecological roles. By utilizing molecular techniques such as DNA sequencing and fingerprinting, researchers have made significant strides in various fields related to bacterial studies.Resolving Taxonomic AmbiguitiesMolecular taxonomy has been instrumental in distinguishing closely related bacterial species initially thought to...
630
Phylogenetic Trees
50.4K
Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.
50.4K
Single Nucleotide Polymorphisms-SNPs
18.8K
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
18.8K

