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首页> 外文期刊>Fungal Genetics and Biology >Sequence diversity and gene expression analyses of expansin-related proteins in the white-rot basidiomycete, Phanerochaete carnosa
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Sequence diversity and gene expression analyses of expansin-related proteins in the white-rot basidiomycete, Phanerochaete carnosa

机译：白腐担子菌Phanerochaete carnosa扩展蛋白相关蛋白的序列多样性和基因表达分析

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摘要

Expansin and expansin-related proteins loosen plant cell wall architectures and are widely distributed in several types of organisms, including plants, fungi and bacteria. Here we describe sequence diversity and unique gene expression profiles of multiple expansin-related proteins identified in the basidiomycete, Phanerochaete carnosa. The protein sequences were homologous to loosenin, an expansin-related protein reported in the basidiomycete, Bjerkandera adusta. We identified homologous sequences of each of those P. carnosa proteins in many basidiomycete species. Twelve P. carnosa loosenin-like proteins (LOOLs) were classified into two subgroups according to sequence homology. Conservation of polysaccharide-binding amino acid residues was stricter in subgroup A. Subgroup A sequences included a conserved 8-9 amino acid insertion in a polysaccharide-binding groove whereas subgroup B contained a 12-18 amino acid insertion next to the binding groove. The P. carnosa genome also encodes the expansin-related protein, DREX1, which adopts a loosenin-like structure but has lower sequence homology to other LOOLs. The gene expression analysis of those proteins showed distinct patterns that were not significantly related to subgroupings. The variation in the protein sequences and gene expression patterns, and wide distribution among the basidiomycota, suggest that the diverse cell wall loosening proteins contribute to effective plant cell wall association and utilization by basidiomycetes. (C) 2014 Elsevier Inc. All rights reserved.
机译：扩张蛋白和扩张蛋白相关蛋白使植物细胞壁结构松动，并广泛分布于几种类型的生物体中，包括植物，真菌和细菌。在这里，我们描述了在担子菌，Phanerochaete carnosa中鉴定的多个扩展蛋白相关蛋白的序列多样性和独特的基因表达谱。蛋白质序列与疏松素同源，疏松素是basidiomycete（Bjerkandera adusta）中报道的一种与扩展蛋白相关的蛋白质。我们在许多担子菌属物种中鉴定出了这些P. carnosa蛋白的同源序列。根据序列同源性，将十二种肉食性松动蛋白样蛋白（LOOL）分为两个亚组。在亚组A中，与多糖结合的氨基酸残基的保守性更严格。亚组A序列在多糖结合槽中包括保守的8-9个氨基酸插入，而亚组B在结合槽附近包含12-18个氨基酸插入。 Carnosa P. carnosa基因组还编码与扩张蛋白相关的蛋白质DREX1，该蛋白质采用类似疏松素的结构，但与其他LOOL的序列同源性较低。这些蛋白质的基因表达分析显示出与亚组无关的独特模式。蛋白质序列和基因表达模式的变化以及在担子菌中的广泛分布表明，细胞壁松散蛋白的多样性有助于担子菌有效地与植物细胞壁结合和利用。 （C）2014 Elsevier Inc.保留所有权利。

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