Atta cephalotes genoom gesequencet

Atta cephalotes genoom gesequencet

Berichtdoor Elan » Za 12 Feb 2011, 11:16

Volledige titel:
The Genome Sequence of the Leaf-Cutter Ant Atta cephalotes Reveals Insights into Its Obligate Symbiotic Lifestyle

Auteur(s):
Garret Suen, Clotilde Teiling, Lewyn Li, Carson Holt, Ehab Abouheif, Erich Bornberg-Bauer, Pascal Bouffard, Eric J. Caldera, Elizabeth Cash, Amy Cavanaugh, Olgert Denas, Eran Elhaik, Marie-Julie Favé, Jürgen Gadau, Joshua D. Gibson, Dan Graur, Kirk J. Grubbs, Darren E. Hagen, Timothy T. Harkins, Martin Helmkamp, Hao Hu, Brian R. Johnson, Jay Kim, Sarah E. Marsh, Joseph A. Moeller, Mónica C. Muñoz-Torres, Marguerite C. Murphy, Meredith C. Naughton, Surabhi Nigam, Rick Overson, Rajendhran Rajakumar, Justin T. Reese, Jarrod J. Scott, Chris R. Smith, Shu Tao, Neil D. Tsutsui, Lumi Viljakainen, Lothar Wissler, Mark D. Yandell, Fabian Zimmer, James Taylor, Steven C. Slater, Sandra W. Clifton, Wesley C. Warren, Christine G. Elsik, Christopher D. Smith, George M. Weinstock, Nicole M. Gerardo, Cameron R. Currie

Gepubliceerd in:
PLoS Genetics

Jaar van publicatie:
2011

Abstract:
Leaf-cutter ants are one of the most important herbivorous insects in the Neotropics, harvesting vast quantities of fresh leaf material. The ants use leaves to cultivate a fungus that serves as the colony's primary food source. This obligate ant-fungus mutualism is one of the few occurrences of farming by non-humans and likely facilitated the formation of their massive colonies. Mature leaf-cutter ant colonies contain millions of workers ranging in size from small garden tenders to large soldiers, resulting in one of the most complex polymorphic caste systems within ants. To begin uncovering the genomic underpinnings of this system, we sequenced the genome of Atta cephalotes using 454 pyrosequencing. One prediction from this ant's lifestyle is that it has undergone genetic modifications that reflect its obligate dependence on the fungus for nutrients. Analysis of this genome sequence is consistent with this hypothesis, as we find evidence for reductions in genes related to nutrient acquisition. These include extensive reductions in serine proteases (which are likely unnecessary because proteolysis is not a primary mechanism used to process nutrients obtained from the fungus), a loss of genes involved in arginine biosynthesis (suggesting that this amino acid is obtained from the fungus), and the absence of a hexamerin (which sequesters amino acids during larval development in other insects). Following recent reports of genome sequences from other insects that engage in symbioses with beneficial microbes, the A. cephalotes genome provides new insights into the symbiotic lifestyle of this ant and advances our understanding of host–microbe symbioses.

Webadres:
http://www.plosgenetics.org/article/inf ... en.1002007

(doi:10.1371/journal.pgen.1002007)



Zie ook een inleidend/samenvattend nieuwsbericht op de site van Scientific American. Handig voor mensen die niet thuis zijn in biologie/genetica jargon.
Laatst gewijzigd door Elan op Zo 13 Feb 2011, 12:42, in totaal 1 keer gewijzigd.
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Re: Atta cephalotes genoom gesequencet

Berichtdoor Elan » Zo 13 Feb 2011, 12:39

Offtopic: Ondanks dat ik mezelf vaak als grammar-nazi beschouw blijf ik Engelse werkwoorden vervoegen op z'n Nederlands toch lastig vinden. Bedankt Floris ;)
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Elan
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