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DNA Bacteriophages01:26

DNA Bacteriophages

Bacteriophages, or phages, are viruses that specifically infect bacteria, utilizing their genetic material to hijack host cellular machinery for replication. DNA bacteriophages employ single-stranded DNA (ssDNA) or double-stranded DNA (dsDNA) genomes. These phages exhibit diverse replication strategies and host interactions, influencing their ecological roles and applications in biotechnology and medicine.ssDNA BacteriophagesssDNA phages, with their small genomes, utilize unique strategies to...
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Bacteriophages are found throughout the human body. They may even outnumber eukaryotic viruses, forming an important and dynamic component of the human virome. Indeed, phages represent the most abundant viral entities, with densities in the gut reaching up to 10⁹ particles per gram of fecal matter, and many belonging to orders such as Caudovirales and Microviridae, while a substantial proportion remains unclassified as viral “dark matter.”Lysogeny and Genetic ExchangeIn the gut, bacteriophages...
Lytic Cycle of Bacteriophages01:30

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Phage Phenomics: Physiological Approaches to Characterize Novel Viral Proteins
09:40

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Published on: June 11, 2015

In silico identification of genes in bacteriophage DNA.

Andrew M Kropinski1, Mark Borodovsky, Tim J Carver

  • 1Public Health Agency of Canada, Laboratory for Foodborne Diseases, Guelph, Ontario, Canada.

Methods in Molecular Biology (Clifton, N.J.)
|December 17, 2008
PubMed
Summary

Identifying genes, including transfer RNA (tRNA) and protein-encoding genes, is crucial in genome sequencing. This work reviews essential tools like BLASTX for gene identification and various software for genome annotation and comparison.

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Area of Science:

  • Genomics
  • Bioinformatics
  • Molecular Biology

Background:

  • Genome sequencing projects aim to identify all genes within an organism's DNA.
  • Genes are broadly classified into those encoding transfer RNAs (tRNAs) and those encoding proteins.
  • Identifying protein-encoding genes often relies on finding homologous sequences using tools like BLASTX.

Purpose of the Study:

  • To introduce and discuss various computational tools for genome annotation and comparison.
  • To highlight the utility of the Basic Local Alignment Search Tool (BLASTX) in gene identification.
  • To provide an overview of software used by their creators for specific genomic analyses.

Main Methods:

  • Review of established and novel bioinformatics tools for genome analysis.
  • Discussion of gene identification strategies, including homology searches with BLASTX.
  • Categorization of tools based on their primary function: genome annotation or genome comparison.

Main Results:

  • Several tools for genome annotation are presented: GeneMark, Artemis, and BASys.
  • Multiple tools for genome comparison are discussed: Artemis Comparison Tool (ACT), Mauve, CoreGenes, and GeneOrder.
  • The utility of these tools is demonstrated through their application in genome sequencing projects.

Conclusions:

  • A comprehensive suite of bioinformatics tools is available for effective genome annotation and comparison.
  • The selection of appropriate tools depends on the specific research question and data type.
  • These tools are essential for advancing our understanding of genomic structures and functions.