Expansion of signal pathways in the ectomycorrhizal fungus <i>Laccaria bicolor</i>&#x2013; evolution of nucleotide sequences and expression patterns in families of protein kinases and RAS small GTPases Export

@article{citeulike:4672857, abstract = {The ectomycorrhizal fungus Laccaria bicolor has the largest genome of all fungi yet sequenced. The large genome size is partly a result of an expansion of gene family sizes. Among the largest gene families are protein kinases and RAS small guanosine triphosphatases (GTPases), which are key components of signal transduction pathways. Comparative genomics and phylogenetic analyses were used to examine the evolution of the two largest families of protein kinases and RAS small GTPases in L. bicolor. Expression levels in various tissues and growth conditions were inferred from microarray data. The two families possessed a large number of young duplicates (paralogs) that had arisen in the Laccaria lineage following the separation from the saprophyte Coprinopsis cinerea. The protein kinase paralogs were dispersed in many small clades and the majority were pseudogenes. By contrast, the RAS paralogs were found in three large groups of RAS1-, RAS2- and RHO1-like GTPases with few pseudogenes. Duplicates of protein kinases and RAS small GTPase have either retained, gained or lost motifs found in the coding regions of their ancestors. Frequent outcomes during evolution were the formation of pseudogenes (nonfunctionalization) or proteins with novel structures and expression patterns (neofunctionalization). New Phytologist (2009)doi: 10.1111/j.1469-8137.2009.02860.x}, address = {Department of Microbial Ecology, Ecology Building, Lund University, SE-223 62, Lund, Sweden; ; UMR1136, INRA-Nancy Universit, Interactions Arbres/Microorganismes, INRA-Nancy, 54280 Champenoux, France}, author = {Rajashekar, Balaji and Kohler, Annegret and Johansson, Tomas and Martin, Francis and Tunlid, Anders and Ahr\'{e}n, Dag}, citeulike-article-id = {4672857}, citeulike-linkout-0 = {http://dx.doi.org/10.1111/j.1469-8137.2009.02860.x}, citeulike-linkout-1 = {http://www3.interscience.wiley.com/cgi-bin/abstract/122381237/ABSTRACT}, doi = {10.1111/j.1469-8137.2009.02860.x}, journal = {New Phytologist}, keywords = {basidiomycota, fungi, gene\_family}, number = {9999}, posted-at = {2009-05-29 04:00:36}, priority = {2}, title = {Expansion of signal pathways in the ectomycorrhizal fungus <i>Laccaria bicolor</i>\&\#x2013; evolution of nucleotide sequences and expression patterns in families of protein kinases and RAS small GTPases}, url = {http://dx.doi.org/10.1111/j.1469-8137.2009.02860.x}, volume = {9999}, year = {2009} }

TY - JOUR ID - citeulike:4672857 L3 - citeulike-article-id:4672857 N2 - The ectomycorrhizal fungus Laccaria bicolor has the largest genome of all fungi yet sequenced. The large genome size is partly a result of an expansion of gene family sizes. Among the largest gene families are protein kinases and RAS small guanosine triphosphatases (GTPases), which are key components of signal transduction pathways. Comparative genomics and phylogenetic analyses were used to examine the evolution of the two largest families of protein kinases and RAS small GTPases in L. bicolor. Expression levels in various tissues and growth conditions were inferred from microarray data. The two families possessed a large number of young duplicates (paralogs) that had arisen in the Laccaria lineage following the separation from the saprophyte Coprinopsis cinerea. The protein kinase paralogs were dispersed in many small clades and the majority were pseudogenes. By contrast, the RAS paralogs were found in three large groups of RAS1-, RAS2- and RHO1-like GTPases with few pseudogenes. Duplicates of protein kinases and RAS small GTPase have either retained, gained or lost motifs found in the coding regions of their ancestors. Frequent outcomes during evolution were the formation of pseudogenes (nonfunctionalization) or proteins with novel structures and expression patterns (neofunctionalization). New Phytologist (2009)doi: 10.1111/j.1469-8137.2009.02860.x IS - 9999 JF - New Phytologist AD - Department of Microbial Ecology, Ecology Building, Lund University, SE-223 62, Lund, Sweden; ; UMR1136, INRA-Nancy Universit, Interactions Arbres/Microorganismes, INRA-Nancy, 54280 Champenoux, France TI - Expansion of signal pathways in the ectomycorrhizal fungus <i>Laccaria bicolor</i>&#x2013; evolution of nucleotide sequences and expression patterns in families of protein kinases and RAS small GTPases VL - 9999 KW - basidiomycota KW - fungi KW - gene_family AU - Rajashekar, Balaji AU - Kohler, Annegret AU - Johansson, Tomas AU - Martin, Francis AU - Tunlid, Anders AU - Ahrén, Dag PY - 2009/// UR - http://dx.doi.org/10.1111/j.1469-8137.2009.02860.x ER -