Proteome-wide lysine succinylome profiling and comprehensive analysis of protein lysine co-modification in developing rice seeds

ABSTRACT: Lysine succinylation has been recognized as a post-translational modification (PTM) in recent years. It is plausible that succinylation may have a vaster functional impact than acetylation due to bulkier structural changes and greater charge differences on the modified lysine residue. Currently, however, the quantity of identified succinylated proteins and their corresponding functions in cereal plants remain largely unknown. In this study, 854 lysine succinylation sites on 347 proteins have been identified by a thorough investigation in developing rice seeds. Six motifs were revealed as preferred amino-acid sequence arrangements for succinylation sites, and a noteworthy motif preference was discovered in proteins associated with different biological processes, molecular functions, pathways, and domains. Remarkably, heavy succinylation was detected on major seed storage proteins, in conjunction with key enzymes involved in central carbon metabolism and starch biosynthetic pathways for rice seed development. Conserved succinylated proteins were identified amongst varying organisms. Rice proteins with co-modifications of succinylation, acetylation, malonylation, crotonylation, and 2-hydroxyisobutyrylation were identified through a comprehensive comparison analysis. A striking number of highly conserved succinyl-proteins and multi-modified proteins were shown to be involved in vital metabolic events. Our study delivers a platform for expansive investigation of molecular networks administrating cereal seed development via PTMs.

INSTRUMENT(S): Q Exactive Plus

ORGANISM(S): Oryza Sativa (rice)

TISSUE(S): Seed

SUBMITTER: xiaonan fu  

LAB HEAD: Zhaohua Peng

PROVIDER: PXD013664 | Pride | 2019-09-09

REPOSITORIES: Pride