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Vol 48(2014) N 3 p. 439-447; DOI 10.1134/S0026893314030145 Full Text

D.G. Naumoff*, A.A. Ivanova, S.N. Dedysh

Phylogeny of β-Xylanases from Planctomycetes

Winogradsky Institute of Microbiology, Russian Academy of Sciences, Moscow, 117312, Russia

*daniil_naumoff@yahoo.com
Received - 2013-11-15; Accepted - 2013-12-03

Here, we present the results of a computational analysis of a group of hypothetical GH10 endo-β-xylanases from the Planctomycetes, a bacterial phylum with poorly characterized functional capabilities. These proteins are encoded in all analyzed genomes of heterotrophic Planctomycetes and form a phylogenetically distinct and tight cluster. In addition, we determined nucleotide sequences for endo-β-xylanase genes from five strains of Isosphaera-Singulisphaera group of the Planctomycetes. The trees constructed for the 16S rRNA genes and the inferred amino acid sequences of endo-β-xylanases were highly congruent, thus suggesting the vertical transfer of endo-β-xylanase genes and their functional importance in Planctomycetes.

Planctomycetes, Singulisphaera, Isosphaera, glycoside hydrolase, endo-glycosidase, β-xylanase, GH10 family, CAZy, hierarchical protein classification, protein evolution, protein phylogenetic tree, search of homologues



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