Ma Yingxuan, Johnson Kim
Key Laboratory of Forest Genetics & Biotechnology of Ministry of Education, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu 210037, China.
La Trobe Institute for Sustainable Agriculture & Food, Department of Animal, Plant and Soil Sciences, AgriBio Building, La Trobe University, Bundoora, VIC 3086, Australia.
Cell Surf. 2023 Feb 17;9:100102. doi: 10.1016/j.tcsw.2023.100102. eCollection 2023 Dec.
Arabinogalactan-proteins (AGPs) are cell wall glycoproteins that make up a relatively small component of the extracellular matrix of plants yet have significant influence on wall mechanics and signalling. Present in walls of algae, bryophytes and angiosperms, AGPs have a wide range of functional roles, from signalling, cell expansion and division, embryogenesis, responses to abiotic and biotic stress, plant growth and development. AGPs interact with and influence wall matrix components and plasma membrane proteins to regulate developmental pathways and growth responses, yet the exact mechanisms remain elusive. Comprising a large gene family that is highly diverse, from minimally to highly glycosylated members, varying in their glycan heterogeneity, can be plasma membrane bound or secreted into the extracellular matrix, have members that are highly tissue specific to those with constitutive expression; all these factors have made it extremely challenging to categorise AGPs many qualities and roles. Here we attempt to define some key features of AGPs and their biological functions.
阿拉伯半乳聚糖蛋白（AGPs）是细胞壁糖蛋白，它们在植物细胞外基质中所占比例相对较小，但对细胞壁力学和信号传导有重大影响。AGPs存在于藻类、苔藓植物和被子植物的细胞壁中，具有广泛的功能作用，包括信号传导、细胞扩张和分裂、胚胎发生、对非生物和生物胁迫的反应以及植物生长发育。AGPs与细胞壁基质成分和质膜蛋白相互作用并影响它们，以调节发育途径和生长反应，但其确切机制仍不清楚。AGPs由一个高度多样化的大基因家族组成，从糖基化程度最低到最高的成员都有，聚糖异质性不同，可以与质膜结合或分泌到细胞外基质中，有高度组织特异性的成员，也有组成型表达的成员；所有这些因素使得对AGPs的多种特性和作用进行分类极具挑战性。在这里，我们试图定义AGPs的一些关键特征及其生物学功能。
