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Related Concept Videos

Genomics02:02

Genomics

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...
Genome Annotation and Assembly03:36

Genome 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.
Sanger Sequencing01:57

Sanger Sequencing

DNA sequencing is a fundamental technique that is routinely used in the biological sciences. This method can be applied to a range of questions at different scales - from the sequencing of a cloned DNA fragment or the study of a mutation in a gene up to whole-genome sequencing. However, despite the widespread use of sequencing today, it was not until 1977 that Fredrick Sanger and his collaborators developed the chain-termination method to decode DNA sequences. It relies on the separation of a...
Next-generation Sequencing03:00

Next-generation Sequencing

The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features.
Evolutionary Relationships through Genome Comparisons02:54

Evolutionary 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...
Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

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...

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Related Experiment Video

Updated: Jun 10, 2026

Hybrid De Novo Genome Assembly for the Generation of Complete Genomes of Urinary Bacteria using Short- and Long-read Sequencing Technologies
12:08

Hybrid De Novo Genome Assembly for the Generation of Complete Genomes of Urinary Bacteria using Short- and Long-read Sequencing Technologies

Published on: August 20, 2021

From complete genome sequence to 'complete' understanding?

Michael Y Galperin1, Eugene V Koonin

  • 1National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD 20894, USA. galperin@ncbi.nlm.nih.gov

Trends in Biotechnology
|July 22, 2010
PubMed
Summary
This summary is machine-generated.

Genomic data is growing fast, but understanding gene function lags behind. Protein family classification offers more robust functional assignments than overly specific gene annotations for advancing biological insights.

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Last Updated: Jun 10, 2026

Hybrid De Novo Genome Assembly for the Generation of Complete Genomes of Urinary Bacteria using Short- and Long-read Sequencing Technologies
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Area of Science:

  • Genomics
  • Bioinformatics
  • Molecular Biology

Background:

  • Genome sequencing accelerates, creating a gap with functional characterization.
  • Genomic analysis offers insights but faces challenges in deep biological understanding.

Purpose of the Study:

  • To address the need for more genomes and assess the depth of biological understanding from genomic analysis.
  • To evaluate the utility of gene function annotations versus protein family classifications.
  • To discuss challenges in understanding conserved hypothetical genes.

Main Methods:

  • Comparative analysis of gene function annotation strategies.
  • Evaluation of protein family classification for functional genomics.
  • Review of current challenges in genomic data interpretation.

Main Results:

  • Generic functional assignments based on protein families are more robust than overly specific gene annotations.
  • A significant gap persists between genome sequencing speed and functional characterization.
  • Understanding conserved hypothetical genes remains a key challenge in genomics.

Conclusions:

  • Prioritizing robust functional assignments aids biological understanding.
  • Addressing the genomics-functionality gap is crucial for biological discovery.
  • Further research is needed to elucidate the roles of conserved hypothetical proteins.