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Related Concept Videos

Genetic Variation01:25

Genetic Variation

297
Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles,...
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Single Nucleotide Polymorphisms-SNPs01:05

Single Nucleotide Polymorphisms-SNPs

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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,...
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Comparing Copy Number Variations and SNPs02:26

Comparing Copy Number Variations and SNPs

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Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
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Genomics02:02

Genomics

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Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
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Variability: Analysis01:11

Variability: Analysis

144
Measures of variability are statistical metrics that reveal the dispersion pattern within a dataset. They are pivotal in biostatistics, providing insights into the heterogeneity within health and biological data. Variability signifies the degree to which data points diverge from one another, helping researchers understand the potential range of values and associated uncertainty within the data.
The range is a simple measure of variability, indicating the difference between the highest and...
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Applications of Molecular Taxonomy01:20

Applications of Molecular Taxonomy

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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...
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Related Experiment Video

Updated: Jul 12, 2025

Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
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COV2Var, a function annotation database of SARS-CoV-2 genetic variation.

Yuzhou Feng1,2, Jiahao Yi3, Lin Yang4

  • 1Department of Laboratory Medicine and West China Biomedical Big Data Center, West China Hospital, Sichuan University, Chengdu 610041, China.

Nucleic Acids Research
|October 28, 2023
PubMed
Summary

The COV2Var database provides functional annotations for SARS-CoV-2 mutations, linking genetic variations to disease severity and viral evolution. This resource aids in understanding viral changes and developing effective countermeasures against COVID-19.

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Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease
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Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease
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Area of Science:

  • Virology
  • Genomics
  • Bioinformatics

Background:

  • The COVID-19 pandemic, caused by SARS-CoV-2, has led to significant global health and economic impacts.
  • Viral mutations in SARS-CoV-2 can alter transmissibility, disease severity, immune evasion, and treatment efficacy.
  • Existing resources lack comprehensive functional annotations for SARS-CoV-2 mutations and their relationships with various factors.

Purpose of the Study:

  • To address the gap in understanding the functional impact of SARS-CoV-2 mutations.
  • To build a comprehensive database of functional annotations for SARS-CoV-2 genetic variations.
  • To facilitate research on the relationship between mutations and factors like disease severity, immune escape, and viral evolution.

Main Methods:

  • Development of the COV2Var database.
  • Identification of common mutations in SARS-CoV-2 variants.
  • Functional annotation of identified mutations.

Main Results:

  • COV2Var provides a centralized resource for SARS-CoV-2 genetic variation with functional annotations.
  • The database links mutations to critical factors including disease severity, immune response, and viral evolution.
  • It aids in assessing the effects of common mutations in SARS-CoV-2 variants.

Conclusions:

  • COV2Var is a valuable resource for researchers studying SARS-CoV-2 evolution and pathogenicity.
  • Understanding mutation-factor relationships is crucial for developing effective COVID-19 strategies.
  • The database supports the development of targeted vaccines and treatments by providing insights into viral adaptation.