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Identification of Novel Genes Associated with Alginate Production in Pseudomonas aeruginosa Using Mini-himar1 Mariner Transposon-mediated Mutagenesis
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Actinomycete integrative and conjugative pMEA-like elements of Amycolatopsis and Saccharopolyspora decoded

Evelien M te Poele1, Markiyan Samborskyy, Markiyan Oliynyk

  • 1Department of Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Kerklaan 30, 9751 NN Haren, The Netherlands.

Plasmid
|February 26, 2008
PubMed

Insights

Actinomycete integrative and conjugative elements (AICEs) are conserved across bacteria, playing roles in gene transfer. This study analyzes AICE structure and function, revealing new elements and their potential impact on antibiotic resistance and genome evolution.

Area of Science:

  • Microbiology and Molecular Biology
  • Genomics and Bioinformatics
  • Bacterial Genetics

Background:

  • Actinomycete integrative and conjugative elements (AICEs) are crucial mobile genetic elements in actinomycetes, key producers of bioactive compounds.
  • Understanding AICEs is vital for comprehending secondary metabolite production and bacterial evolution.

Purpose of the Study:

  • To analyze the conserved structural organization and functional modules of AICEs.
  • To identify and characterize novel AICEs in actinomycete genomes.
  • To investigate the evolutionary origins and functional properties of AICEs.

Main Methods:

  • Comparative genomics of AICEs from Amycolatopsis mediterranei, Amycolatopsis methanolica, and Saccharopolyspora erythraea.
  • Bioinformatic analysis of conserved and novel AICE sequences.
  • Identification of homologous proteins in other actinomycete genera.

Main Results:

  • A highly conserved four-module structure (replication, excision/integration, regulation, conjugative transfer) was identified in AICEs.
  • Two novel putative AICEs, pSE222 and pSE102, were discovered in Saccharopolyspora erythraea, with pSE102 potentially conferring antibiotic resistance.
  • Functional AICEs were suggested within Streptomyces coelicolor genome insertions, and homologous proteins were found in Frankia and Salinispora species.

Conclusions:

  • AICEs exhibit conserved structural organization and functional modules, contributing to genome plasticity.
  • AICEs are implicated in horizontal gene transfer, potentially spreading antibiotic resistance genes.
  • This research enhances understanding of AICE evolution and their role in bacterial adaptation.

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