Ramaiya P

References (2)

Title : Genome, transcriptome, and secretome analysis of wood decay fungus Postia placenta supports unique mechanisms of lignocellulose conversion - Martinez_2009_Proc.Natl.Acad.Sci.U.S.A_106_1954
Author(s) : Martinez D , Challacombe J , Morgenstern I , Hibbett D , Schmoll M , Kubicek CP , Ferreira P , Ruiz-Duenas FJ , Martinez AT , Kersten P , Hammel KE , Vanden Wymelenberg A , Gaskell J , Lindquist E , Sabat G , Bondurant SS , Larrondo LF , Canessa P , Vicuna R , Yadav J , Doddapaneni H , Subramanian V , Pisabarro AG , Lavin JL , Oguiza JA , Master E , Henrissat B , Coutinho PM , Harris P , Magnuson JK , Baker SE , Bruno K , Kenealy W , Hoegger PJ , Kues U , Ramaiya P , Lucas S , Salamov A , Shapiro H , Tu H , Chee CL , Misra M , Xie G , Teter S , Yaver D , James T , Mokrejs M , Pospisek M , Grigoriev IV , Brettin T , Rokhsar D , Berka R , Cullen D
Ref : Proc Natl Acad Sci U S A , 106 :1954 , 2009
Abstract : Brown-rot fungi such as Postia placenta are common inhabitants of forest ecosystems and are also largely responsible for the destructive decay of wooden structures. Rapid depolymerization of cellulose is a distinguishing feature of brown-rot, but the biochemical mechanisms and underlying genetics are poorly understood. Systematic examination of the P. placenta genome, transcriptome, and secretome revealed unique extracellular enzyme systems, including an unusual repertoire of extracellular glycoside hydrolases. Genes encoding exocellobiohydrolases and cellulose-binding domains, typical of cellulolytic microbes, are absent in this efficient cellulose-degrading fungus. When P. placenta was grown in medium containing cellulose as sole carbon source, transcripts corresponding to many hemicellulases and to a single putative beta-1-4 endoglucanase were expressed at high levels relative to glucose-grown cultures. These transcript profiles were confirmed by direct identification of peptides by liquid chromatography-tandem mass spectrometry (LC-MS/MS). Also up-regulated during growth on cellulose medium were putative iron reductases, quinone reductase, and structurally divergent oxidases potentially involved in extracellular generation of Fe(II) and H(2)O(2). These observations are consistent with a biodegradative role for Fenton chemistry in which Fe(II) and H(2)O(2) react to form hydroxyl radicals, highly reactive oxidants capable of depolymerizing cellulose. The P. placenta genome resources provide unparalleled opportunities for investigating such unusual mechanisms of cellulose conversion. More broadly, the genome offers insight into the diversification of lignocellulose degrading mechanisms in fungi. Comparisons with the closely related white-rot fungus Phanerochaete chrysosporium support an evolutionary shift from white-rot to brown-rot during which the capacity for efficient depolymerization of lignin was lost.
ESTHER : Martinez_2009_Proc.Natl.Acad.Sci.U.S.A_106_1954
PubMedSearch : Martinez_2009_Proc.Natl.Acad.Sci.U.S.A_106_1954
PubMedID: 19193860
Gene_locus related to this paper: pospm-b8p1f3 , pospm-b8p2q7 , pospm-b8p4n0 , pospm-b8p4n9 , pospm-b8p5g9 , pospm-b8p5r9 , pospm-b8p6h2 , pospm-b8p7b1 , pospm-b8p7c4 , pospm-b8p8w7 , pospm-b8p9j1 , pospm-b8p164 , pospm-b8p280 , pospm-b8p423.1 , pospm-b8p423.2 , pospm-b8p858 , pospm-b8pam2 , pospm-b8pam5 , pospm-b8pb68 , pospm-b8pbm3 , pospm-b8pc54 , pospm-b8pc56 , pospm-b8pce4 , pospm-b8pd91 , pospm-b8pdk6 , pospm-b8ph32 , pospm-b8ph43 , pospm-b8phc9 , pospm-b8php7 , pospm-b8phy5 , pospm-b8pjg8 , pospm-b8pji9 , pospm-b8plr5 , pospm-b8pmk3 , pospm-b8pfg0 , pospm-b8pg35 , pospm-b8pa20.1 , pospm-b8pa20.2 , pospm-b8p4g8 , pospm-b8phn6

Title : Complete genome sequence of the industrial bacterium Bacillus licheniformis and comparisons with closely related Bacillus species - Rey_2004_Genome.Biol_5_R77
Author(s) : Rey MW , Ramaiya P , Nelson BA , Brody-Karpin SD , Zaretsky EJ , Tang M , Lopez de Leon A , Xiang H , Gusti V , Clausen IG , Olsen PB , Rasmussen MD , Andersen JT , Jorgensen PL , Larsen TS , Sorokin A , Bolotin A , Lapidus A , Galleron N , Ehrlich SD , Berka RM
Ref : Genome Biol , 5 :R77 , 2004
Abstract : BACKGROUND: Bacillus licheniformis is a Gram-positive, spore-forming soil bacterium that is used in the biotechnology industry to manufacture enzymes, antibiotics, biochemicals and consumer products. This species is closely related to the well studied model organism Bacillus subtilis, and produces an assortment of extracellular enzymes that may contribute to nutrient cycling in nature.
RESULTS: We determined the complete nucleotide sequence of the B. licheniformis ATCC 14580 genome which comprises a circular chromosome of 4,222,336 base-pairs (bp) containing 4,208 predicted protein-coding genes with an average size of 873 bp, seven rRNA operons, and 72 tRNA genes. The B. licheniformis chromosome contains large regions that are colinear with the genomes of B. subtilis and Bacillus halodurans, and approximately 80% of the predicted B. licheniformis coding sequences have B. subtilis orthologs.
CONCLUSIONS: Despite the unmistakable organizational similarities between the B. licheniformis and B. subtilis genomes, there are notable differences in the numbers and locations of prophages, transposable elements and a number of extracellular enzymes and secondary metabolic pathway operons that distinguish these species. Differences include a region of more than 80 kilobases (kb) that comprises a cluster of polyketide synthase genes and a second operon of 38 kb encoding plipastatin synthase enzymes that are absent in the B. licheniformis genome. The availability of a completed genome sequence for B. licheniformis should facilitate the design and construction of improved industrial strains and allow for comparative genomics and evolutionary studies within this group of Bacillaceae.
ESTHER : Rey_2004_Genome.Biol_5_R77
PubMedSearch : Rey_2004_Genome.Biol_5_R77
PubMedID: 15461803
Gene_locus related to this paper: bacld-q62u01 , bacld-Q65L73 , bacld-q62yz9 , bacld-q65dz7 , bacld-q65e02 , bacld-q65eq1 , bacld-q65fc5 , bacld-q65fg2 , bacld-q65fg3 , bacld-q65fk9 , bacld-q65ft3 , bacld-q65fw3 , bacld-q65fy2 , bacld-q65gx2 , bacld-q65hn8 , bacld-q65hr4 , bacld-q65if8 , bacld-q65iy4 , bacld-q65j72 , bacld-q65le0 , bacld-q65ly2 , bacld-q65m29 , bacld-q65mg8 , bacld-q65my7 , bacld-q65n63 , bacld-q65nk2 , bacld-q65nm7 , bacli-LICC