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Related Concept Videos

DNA Bacteriophages01:26

DNA Bacteriophages

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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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Lytic Cycle of Bacteriophages01:30

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Bacteriophages, also known as phages, are specialized viruses that infect bacteria. A key characteristic of phages is their distinctive “head-tail” morphology. A phage begins the infection process (i.e., lytic cycle) by attaching to the outside of a bacterial cell. Attachment is accomplished via proteins in the phage tail that bind to specific receptor proteins on the outer surface of the bacterium. The tail injects the phage’s DNA genome into the bacterial cytoplasm. In the...
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Lysogenic Cycle of Bacteriophages00:43

Lysogenic Cycle of Bacteriophages

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In contrast to the lytic cycle, phages infecting bacteria via the lysogenic cycle do not immediately kill their host cell. Instead, they combine their genome with the host genome, allowing the bacteria to replicate the phage DNA along with the bacterial genome. The incorporated copy of the phage genome is called the prophage. Some prophages can re-activate and enter the lytic cycle. This often occurs in response to a perturbation, such as DNA damage, but can also transpire in the absence of...
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Viral Replication: Lytic Cycle01:20

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Bacteriophages, or phages, are viruses that specifically infect bacteria. Among them, T-even bacteriophages, such as T4, exhibit a well-characterized lytic replication cycle in Escherichia coli (E. coli). This process ensures the rapid proliferation of the virus while ultimately leading to the destruction of the bacterial host.Attachment and DNA InjectionThe infection process begins with the recognition and binding of the T4 phage to the E. coli cell surface. Tail fibers of the phage...
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Phagocytosis00:41

Phagocytosis

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Cells pull particles inward and engulf them in spherical vesicles in an energy-requiring process called endocytosis. Phagocytosis ("cellular eating") is one of three major types of endocytosis. Cells use phagocytosis to take in large objects, such as other cells (or their debris), bacteria, and even viruses.
The objective of phagocytosis is often destruction. Cells use phagocytosis to eliminate unwelcome visitors, like pathogens (e.g., viruses and bacteria). Many immune system cells,...
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Viral Replication: Lysogenic Cycle01:16

Viral Replication: Lysogenic Cycle

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The lysogenic cycle is a crucial viral replication strategy that allows bacteriophages to persist within host cells without immediately destroying them. This process is primarily observed in temperate phages, such as bacteriophage lambda (λ), which infects Escherichia coli. The cycle allows the viral genome to persist across bacterial generations while keeping host cells viable.Integration of the Viral GenomeUpon infection, bacteriophage lambda attaches to the bacterial surface and injects...
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Jumbo phages.

Kate R Harding1, Natalie Kyte2, Peter C Fineran3

  • 1Department of Microbiology and Immunology, University of Otago, Dunedin 9054, New Zealand; Genetics Otago, University of Otago, Dunedin 9054, New Zealand; Maurice Wilkins Centre for Molecular Biodiscovery, University of Otago, Dunedin 9054, New Zealand.

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|July 25, 2023
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Summary
This summary is machine-generated.

Jumbo phages are giant viruses that infect bacteria. This guide introduces these often-overlooked organisms and their significance in microbiology.

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Area of Science:

  • Microbiology
  • Virology
  • Genomics

Background:

  • Bacteriophages (phages) are viruses that infect bacteria.
  • Phages are abundant in diverse environments and play crucial roles in microbial ecosystems.
  • Jumbo phages represent a distinct and understudied group within the phage universe.

Purpose of the Study:

  • To introduce jumbo phages, a class of large bacteriophages.
  • To highlight the significance and characteristics of these giant phages.
  • To provide a concise overview for researchers entering the field.

Main Methods:

  • Literature review of existing studies on jumbo phages.
  • Analysis of genomic and morphological data of representative jumbo phages.
  • Comparative analysis with smaller phage counterparts.

Main Results:

  • Jumbo phages possess significantly larger genomes compared to typical phages.
  • Their complex structures and unique gene content distinguish them.
  • They infect a range of bacterial hosts, impacting microbial communities.

Conclusions:

  • Jumbo phages are a significant, yet often overlooked, component of the phage world.
  • Further research into their biology and ecological roles is warranted.
  • Understanding jumbo phages can offer new insights into viral evolution and function.