Archives de la catégorie HGT

Horizontal transfer of expressed genes in a parasitic flowering plant

Horizontal transfer of expressed genes in a parasitic flowering plant

Zhenxiang Xi, Robert K Bradley, Kenneth J Wurdack, K.M. Wong, M. Sugumaran, Kirsten Bomblies, Joshua S Rest and Charles C Davis

BMC Genomics 2012, 13:227 doi:10.1186/1471-2164-13-227

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OGM d’écologistes :-)

Hey, j’évite soigneusement d’écrire sur les OGM depuis quelque temps parce que le sujet est préjudiciable à ma santé (l’énervement vous savez…)

Mais je voulais signaler aux écolos de tout bord qui m’ont cassé les couilles au sujet des transferts de gènes qu’ils doivent cesser d’urgence les greffages divers et variables (ils auraient dû ne pas les pratiquer par précaution d’ailleurs). Maintenant on sait, les gènes passent du greffon au porte-greffe. Faudrait que les anti-OGM arrêtent subito-presto de jouer avec la Nature1 😀

Ah et surtout Horizontal Gene Transfert pour des eucaryotes !

Exchange of Genetic Material Between Cells in Plant Tissue Grafts

Sandra Stegemann and Ralph Bock

Science 1 May 2009: Vol. 324. no. 5927, pp. 649 – 651 doi: 10.1126/science.1170397

Tissue grafting includes applications ranging from plant breeding to animal organ transplantation. Donor and recipient are generally believed to maintain their genetic integrity, in that the grafted tissues are joined but their genetic materials do not mix. We grafted tobacco plants from two transgenic lines carrying different marker and reporter genes in different cellular compartments, the nucleus and the plastid. Analysis of the graft sites revealed the frequent occurrence of cells harboring both antibiotic resistances and both fluorescent reporters. Our data demonstrate that plant grafting can result in the exchange of genetic information via either large DNA pieces or entire plastid genomes. This observation of novel combinations of genetic material has implications for grafting techniques and also provides a possible path for horizontal gene transfer.

Via Ed Yong’s Not Exactly Rocket Science


1. Je plaisante, continuez tranquillement l’ingénierie génétique verte les gens

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Newly introduced genomic prophage islands are critical determinants of in vivo competitiveness in the Liverpool Epidemic Strain of Pseudomonas aeruginosa

Newly introduced genomic prophage islands are critical determinants of in vivo competitiveness in the Liverpool Epidemic Strain of Pseudomonas aeruginosa

Craig Winstanley, Morgan G.I. Langille, Joanne L. Fothergill, Irena Kukavica-Ibrulj, Catherine Paradis-Bleau, François Sanschagrin, Nicholas R. Thomson, Geoff L. Winsor, Michael A. Quail, Nicola Lennard, Alexandra Bignell, Louise Clarke, Kathy Seeger, David Saunders, David Harris, Julian Parkhill, Robert E.W. Hancock, Fiona S.L. Brinkman, and Roger C. Levesque

Published in Advance December 1, 2008, doi: 10.1101/gr.086082.108 Genome Res. 2008.

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Horizontal gene transfer of the algal nuclear gene psbO to the photosynthetic sea slug Elysia chlorotica

Horizontal gene transfer of the algal nuclear gene psbO to the photosynthetic sea slug Elysia chlorotica

Mary E. Rumphoa, Jared M. Worfula, Jungho Leeb, Krishna Kannana, Mary S. Tylerc, Debashish Bhattacharyad, Ahmed Moustafad, and James R. Manharte

PNAS November 18, 2008 vol. 105 no. 46 17867-17871

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Rhodostreptomycins, Antibiotics Biosynthesized Following Horizontal Gene Transfer from Streptomyces padanus to Rhodococcus fascians

Rhodostreptomycins, Antibiotics Biosynthesized Following Horizontal Gene Transfer from Streptomyces padanus to Rhodococcus fascians

Kazuhiko Kurosawa, Ion Ghiviriga, T. G. Sambandan, Philip A. Lessard, Joanna E. Barbara, ChoKyun Rha, and Anthony J. Sinskey

J. Am. Chem. Soc., 130 (4), 1126 -1127, 2008. 10.1021/ja077821p

Two antibiotics have been isolated from a strain of Rhodococcus fascians that emerged from a competitive co-culture with Streptomyces padanus. The structures of these compounds were elucidated by detailed analyses by NMR and MS. They belong to the aminoglycoside family of antibiotics, and they are structurally unrelated to the actinomycins that are produced by S. padanus. The compounds have been named rhodostreptomycins A and B, reflecting their rhodococcal origin and streptomycin-like composition. Rhodostreptomycins exhibit antibiotic activity against a range of Gram-positive and Gram-negative bacteria.

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