Encyclopedia of Metagenomics

Living Edition
| Editors: Karen E. Nelson

Metagenomic Potential for Understanding Horizontal Gene Transfer

  • Luigi Grassi
  • Jacopo Grilli
  • Marco Cosentino Lagomarsino
Living reference work entry
DOI: https://doi.org/10.1007/978-1-4614-6418-1_704-4

Definition

Horizontal gene transfer (HGT) describes the biological phenomenon by which an organism acquires genes from organisms belonging to other species, genera, or taxa. Its name reflects the fact that the transfer of genetic information between organisms that are not necessarily related is different from the “vertical” transmission of genes from parent to offsprings. Early reports (Smith et al. 1992) interpreted HGT as a rare event, unable to significantly influence the global composition of target genomes. This first impression was rapidly subverted by the advent of genomic sequencing technologies. For example, the comparison of the genomes of Escherichia coli and Haemophilus influenzae, two bacteria belonging to the same evolutionary lineage, shows a significant difference in their gene content (Tatusov et al. 1996). This difference, which is not at all justifiable only in terms of vertical descent, gave a first indication of the massive role played by HGT in the evolution of...

Keywords

Recombination Proteobacteria Lester 
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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Luigi Grassi
    • 1
  • Jacopo Grilli
    • 2
  • Marco Cosentino Lagomarsino
    • 3
    • 4
  1. 1.Physics DepartmentSapienza University of RomeRomeItaly
  2. 2.Dipartimento di Fisica “G. Galilei”, CNISM and INFNUniversità di PadovaPadovaItaly
  3. 3.Computational and Quantitative BiologyUniversity Pierre et Marie CurieParisFrance
  4. 4.CNRSParisFrance