The molecular architecture of plant secondary cell walls is still not resolved. There are several proposed structures for cellulose fibrils, the main component of plant cell walls and the conformation of other molecules is even less well known. Glucuronic acid (GlcA) substitution of xylan (GUX) enzymes, in CAZy family glycosyl transferase (GT)8, decorate the xylan backbone with various specific patterns of GlcA. It was recently discovered that dicot xylan has a domain with the side chain decorations distributed on every second unit of the backbone (xylose). If the xylan backbone folds in a similar way to glucan chains in cellulose (2-fold helix), this kind of arrangement may allow the undecorated side of the xylan chain to hydrogen bond with the hydrophilic surface of cellulose microfibrils. MD simulations suggest that such interactions are energetically stable. We discuss the possible role of this xylan decoration pattern in building of the plant cell wall.

译文

植物次生细胞壁的分子结构仍未解决。纤维素原纤维有几种提议的结构,植物细胞壁的主要成分和其他分子的构象甚至鲜为人知。在CAZy家族糖基转移酶 (GT)8中,木聚糖 (GUX) 酶的葡萄糖醛酸 (GlcA) 取代用各种特定的GlcA模式装饰木聚糖主链。最近发现双子叶木聚糖有一个结构域,侧链装饰分布在主干 (木糖) 的每第二个单元上。如果木聚糖骨架以与纤维素中的葡聚糖链相似的方式折叠 (2-fold helix),则这种排列可能使木聚糖链的未修饰侧与纤维素微纤维的亲水表面氢键。MD模拟表明,这种相互作用在能量上是稳定的。我们讨论了这种木聚糖装饰模式在植物细胞壁构建中的可能作用。

+1
+2
100研值 100研值 ¥99课程
检索文献一次
下载文献一次

去下载>

成功解锁2个技能,为你点赞

《SCI写作十大必备语法》
解决你的SCI语法难题!

技能熟练度+1

视频课《玩转文献检索》
让你成为检索达人!

恭喜完成新手挑战

手机微信扫一扫,添加好友领取

免费领《Endnote文献管理工具+教程》

微信扫码, 免费领取

手机登录

获取验证码
登录