甘氨酸脱羧酶复合体H蛋白在颤杨非光合组织中的表达

Expression of a glycine decarboxylase complex H-protein in non-photosynthetic tissues of Populus tremuloides.

作者信息

Wang Yuh-Shuh, Harding Scott A, Tsai Chung-Jui

机构信息

Plant Biotechnology Research Center, School of Forest Resources and Environmental Science, Michigan Technological University, Houghton, MI 49931, USA.

出版信息

Biochim Biophys Acta. 2004 Feb 20;1676(3):266-72. doi: 10.1016/j.bbaexp.2003.12.004.

DOI:10.1016/j.bbaexp.2003.12.004

PMID:14984933

Abstract

The Gly decarboxylase complex (GDC) is abundant in mitochondria of C3 leaves and functions in photorespiratory carbon recovery. However, expression of GDC component proteins has generally been less evident in non-green tissues. Here we report an aspen (Populus tremuloides Michx.) PtgdcH1 gene, encoding a GDC subunit H-protein that is phylogenetically distinct from previously characterized photorespiratory H-proteins. Strong expression of PtgdcH1 in root tips and developing xylem suggests that GDC supports a very active C1 metabolism in non-photosynthetic tissues of aspen.

摘要

乙醇酸脱羧酶复合体（GDC）在C3植物叶片的线粒体中含量丰富，在光呼吸碳回收过程中发挥作用。然而，GDC组成蛋白的表达在非绿色组织中通常不太明显。在此，我们报道了一个山杨（Populus tremuloides Michx.）的PtgdcH1基因，它编码一种GDC亚基H蛋白，在系统发育上与先前鉴定的光呼吸H蛋白不同。PtgdcH1在根尖和正在发育的木质部中强烈表达，这表明GDC在山杨的非光合组织中支持非常活跃的C1代谢。