Evolution of xyloglucan-related genes in green plants.
Evolution of xyloglucan-related genes in green plants.
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DOI：
10.1186/1471-2148-10-341
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发表时间：
2010-11-05
影响因子：
3.4
通讯作者：
Vincentz MG
中科院分区：
文献类型：
--
作者：
Del Bem LE;Vincentz MG
植物组织的细胞形状和形态与初生细胞壁的结构修饰密切相关，而初生细胞壁的结构修饰与细胞生长和分化调节的关键过程相关。初生细胞壁主要由浸入半纤维素、果胶、木质素和一些结构蛋白基质中的纤维素组成。木葡聚糖是一种半纤维素多糖，存在于所有陆地植物（有胚植物）的细胞壁中，是非禾本科被子植物中的主要半纤维素。在这项工作中，我们使用比较基因组方法来获得对绿色植物中木葡聚糖相关酶机制进化的新见解。对木葡聚糖合成（木葡聚糖转糖基酶/水解酶、α-木糖苷酶、β-半乳糖苷酶、β-葡萄糖苷酶和 α-岩藻糖苷酶）和动员/降解（β-(1→4)-葡聚糖合成酶、α-岩藻糖基转移酶、β-半乳糖基转移酶和α-木糖基转移酶）基于 12 个完全测序的基因组和来自 29 种绿色植物的表达序列标签。来自绿藻门和链藻门绿藻的证据表明，部分胚胎植物门木葡聚糖相关机制在陆地殖民之前在水生环境中进化。链藻具有至少三种木葡聚糖机械酶：木葡聚糖转糖基酶/水解酶、来自纤维素合酶样 C 家族的 β-(1→4)-葡聚糖合酶和叶绿藻中也存在的 α-木糖苷酶。有趣的是，还检测到具有专门水解活性的木葡聚糖转糖基酶/水解酶的裸子序列直系同源物，这表明这种活性必定出现在种子植物的最后共同祖先中。每个基因家族中创始基因的数量与植物细胞壁的复杂性之间存在正相关。我们的数据支持这样的观点，即链藻中出现了一种原始的木葡聚糖类聚合物，作为一种预适应，使植物能够随后在陆地栖息地定居。我们的结果还提供了额外的证据，证明轮藻类藻类和陆地植物是姐妹类群。
The cell shape and morphology of plant tissues are intimately related to structural modifications in the primary cell wall that are associated with key processes in the regulation of cell growth and differentiation. The primary cell wall is composed mainly of cellulose immersed in a matrix of hemicellulose, pectin, lignin and some structural proteins. Xyloglucan is a hemicellulose polysaccharide present in the cell walls of all land plants (Embryophyta) and is the main hemicellulose in non-graminaceous angiosperms. In this work, we used a comparative genomic approach to obtain new insights into the evolution of the xyloglucan-related enzymatic machinery in green plants. Detailed phylogenetic analyses were done for enzymes involved in xyloglucan synthesis (xyloglucan transglycosylase/hydrolase, α-xylosidase, β-galactosidase, β-glucosidase and α-fucosidase) and mobilization/degradation (β-(1→4)-glucan synthase, α-fucosyltransferases, β-galactosyltransferases and α-xylosyl transferase) based on 12 fully sequenced genomes and expressed sequence tags from 29 species of green plants. Evidence from Chlorophyta and Streptophyta green algae indicated that part of the Embryophyta xyloglucan-related machinery evolved in an aquatic environment, before land colonization. Streptophyte algae have at least three enzymes of the xyloglucan machinery: xyloglucan transglycosylase/hydrolase, β-(1→4)-glucan synthase from the celullose synthase-like C family and α-xylosidase that is also present in chlorophytes. Interestingly, gymnosperm sequences orthologs to xyloglucan transglycosylase/hydrolases with exclusively hydrolytic activity were also detected, suggesting that such activity must have emerged within the last common ancestor of spermatophytes. There was a positive correlation between the numbers of founder genes within each gene family and the complexity of the plant cell wall. Our data support the idea that a primordial xyloglucan-like polymer emerged in streptophyte algae as a pre-adaptation that allowed plants to subsequently colonize terrestrial habitats. Our results also provide additional evidence that charophycean algae and land plants are sister groups.
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影响因子：
4.2
作者：
Becker, Burkhard;Marin, Birger
通讯作者：
Marin, Birger
影响因子：
11.6
作者：
Baumann, Martin J.;Eklof, Jens M.;Brumer, Harry, III
通讯作者：
Brumer, Harry, III
DOI：
10.1073/pnas.0703133104
发表时间：
2007-05-15
影响因子：
11.1
作者：
Cocuron, Jean-Christophe;Lerouxel, Olivier;Wilkerson, Curtis G.
通讯作者：
Wilkerson, Curtis G.
影响因子：
4.3
作者：
Crombie, HJ;Chengappa, S;Reid, JSG
通讯作者：
Reid, JSG
影响因子：
4.1
作者：
Boisselier-Dubayle, MC;Lambourdière, J;Bischler, H
通讯作者：
Bischler, H