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Related Concept Videos

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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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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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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The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
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The organization of prokaryotic genes in their genome is notably different from that of eukaryotes. Prokaryotic genes are organized, such that the genes for proteins involved in the same biochemical process or function are located together in groups. This group of genes, along with their regulatory elements, are collectively known as an operon. The functional genes in an operon are transcribed together to give a single strand of mRNA known as polycistronic mRNA.
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Prokaryotic genomes exhibit a streamlined organization of coding and non-coding regions essential for gene expression and protein synthesis. While coding regions contain the genetic instructions for proteins or functional RNAs, non-coding regions regulate the precise transcription and translation of these genes.Coding Regions: Proteins and RNAsThe primary coding regions, known as structural genes, include sequences transcribed into messenger RNA (mRNA) and ultimately translated into...
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Understanding the Impact of Temperate Bacteriophages on Their Lysogens Through Transcriptomics
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Prophage loci predictor for bacterial genomes.

Manu Rajan Nair1, T Amudha1

  • 1Department of Computer Applications, Bharathiar University, Coimbatore, Tamil Nadu, India.

Journal of Bioinformatics and Computational Biology
|March 1, 2021
PubMed
Summary
This summary is machine-generated.

A new algorithm efficiently predicts prophage loci in bacteria using machine learning and Particle Swarm Optimization (PSO). This method offers high accuracy and significantly faster processing speeds compared to existing tools.

Keywords:
Bioinformaticsprediction algorithmprophagessequence hashing

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Area of Science:

  • Bioinformatics
  • Computational Biology
  • Genomics

Background:

  • Prophages are integrated viral DNA within bacterial genomes.
  • Accurate identification of prophage loci is crucial for understanding bacterial evolution and phage-host interactions.
  • Existing prediction tools often face limitations in speed and resource efficiency.

Purpose of the Study:

  • To develop a novel, highly efficient algorithm for predicting prophage loci in bacterial genomes.
  • To reduce the time-space complexity associated with prophage prediction.
  • To offer a competitive alternative to current prophage prediction software.

Main Methods:

  • A machine learning-based pattern recognition approach was employed.
  • A pattern database was constructed using nucleotide sequences from bacteria and viruses.
  • Particle Swarm Optimization (PSO) was utilized for loci prediction in bacterial test sets.

Main Results:

  • The algorithm demonstrated good performance in predicting prophage loci across diverse bacterial sequences.
  • Predictive performance favorably compared with established tools like PhiSpy and ProphET.
  • The method significantly outperformed existing tools in terms of raw processing speed.

Conclusions:

  • The proposed data-centric algorithm provides an efficient and accurate solution for prophage loci prediction.
  • This approach offers a substantial improvement in processing speed, requiring fewer computational resources.
  • The findings suggest the efficacy of machine learning and optimization techniques in genomic analysis.