Comparative and evolutionary analyses of the divergence of plant oligosaccharyltransferase STT3 isoforms

Niu, Guanting1; Shao, Zhuqing1; Liu, Chuanfa2; Chen, Tianshu1; Jiao, Qingsong1; Hong, Zhi1

2020-02-19

10.1002/2211-5463.12804

FEBS Open Bio   影响因子和分区

2211-5463

STT3 is a catalytic subunit of hetero-oligomeric oligosaccharyltransferase (OST), which is important for asparagine-linked glycosylation. In mammals and plants, OSTs with different STT3 isoforms exhibit distinct levels of enzymatic efficiency or different responses to stressors. Although two different STT3 isoforms have been identified in both plants and animals, it remains unclear whether these isoforms result from gene duplication in an ancestral eukaryote. Furthermore, the molecular mechanisms underlying the functional divergences between the two STT3 isoforms in plant have not been well elucidated. Here, we conducted phylogenetic analysis of the major evolutionary node species and suggested that gene duplications of STT3 may have occurred independently in animals and plants. Across land plants, the exon-intron structure differed between the two STT3 isoforms, but was highly conserved for each isoform. Most angiosperm STT3a genes had 23 exons with intron phase 0, while STT3b genes had 6 exons with intron phase 2. Characteristic motifs (motif 18 and 19) of STT3s were mapped to different structure domains in the plant STT3 proteins. These two motifs overlap with regions of high nonsynonymous-to-synonymous substitution rates, suggesting the regions may be related to functional difference between STT3a and STT3b. In addition, promoter elements and gene expression profiles were different between the two isoforms, indicating expression pattern divergence of the two genes. Collectively, the identified differences may result in the functional divergence of plant STT3s.

evolution N-glycosylation oligosaccharyltransferase selection pressure subunit cooperation

SCI

英语

其他

National Natural Science Foundation of China[31322008] ; National Natural Science Foundation of China[31870263]

Biochemistry & Molecular Biology

Biochemistry & Molecular Biology

WOS:000514327600001

WILEY

Web of Science

1.Nanjing Univ, Sch Life Sci, NAILS, State Key Lab Pharmaceut Biotechnol, Nanjing 210023, Jiangsu, Peoples R China
2.Southern Univ Sci & Technol, Inst Plant & Food Sci, Dept Biol, Shenzhen, Peoples R China

Niu, Guanting,Shao, Zhuqing,Liu, Chuanfa,et al. Comparative and evolutionary analyses of the divergence of plant oligosaccharyltransferase STT3 isoforms[J]. FEBS Open Bio,2020,10(3):468-483.

Niu, Guanting,Shao, Zhuqing,Liu, Chuanfa,Chen, Tianshu,Jiao, Qingsong,&Hong, Zhi.(2020).Comparative and evolutionary analyses of the divergence of plant oligosaccharyltransferase STT3 isoforms.FEBS Open Bio,10(3),468-483.

Niu, Guanting,et al."Comparative and evolutionary analyses of the divergence of plant oligosaccharyltransferase STT3 isoforms".FEBS Open Bio 10.3(2020):468-483.