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副溶血性弧菌中蛋白质赖氨酸琥珀酰化谱的全局分析及其与赖氨酸乙酰化的重叠

Global Analysis of Protein Lysine Succinylation Profiles and Their Overlap with Lysine Acetylation in the Marine Bacterium Vibrio parahemolyticus.

作者信息

Pan Jianyi, Chen Ran, Li Chuchu, Li Weiyan, Ye Zhicang

机构信息

Institute of Proteomics and Molecular Enzymology, School of Life Sciences, Zhejiang Sci-Tech University , Hangzhou 310018, China.

出版信息

J Proteome Res. 2015 Oct 2;14(10):4309-18. doi: 10.1021/acs.jproteome.5b00485. Epub 2015 Sep 21.

Abstract

Protein lysine acylation, including acetylation and succinylation, has been found to be a major post-translational modification (PTM) and is associated with the regulation of cellular processes that are widespread in bacteria. Vibrio parahemolyticus is a model marine bacterium that causes seafood-borne illness in humans worldwide. The lysine acetylation of V. parahemolyticus has been extensively characterized in our previous work, and here, we report the first global analysis of lysine succinylation and the overlap between the two types of acylation in this bacterium. Using high-accuracy nano liquid chromatography-tandem mass spectrometry combined with affinity purification, we identified 1931 lysine succinylated peptides matched on 642 proteins, with the quantity of the succinyl-proteins accounting for 13.3% of the total proteins in cells. Bioinformatics analysis results showed that these succinylated proteins are involved in almost every cellular process, particularly in protein biosynthesis and metabolism, and are distributed in diverse subcellular compartments. Moreover, several sequence motifs were identified, including succinyl-lysine flanked by a lysine or arginine residue at the -8, -7, or +7 position and without these residues at the -1 or +2 position, and these motifs differ from those found in other bacteria and eukaryotic cells. Furthermore, a total of 517 succinyl-lysine sites (26.7%) on 288 proteins (44.9%) were also found to be acetylated, suggesting extensive overlap between succinylation and acetylation in this bacterium. This systematic analysis provides a promising starting point for further investigations of the physiologic and pathogenic roles of lysine succinylation and acetylation in V. parahemolyticus.

摘要

蛋白质赖氨酸酰化,包括乙酰化和琥珀酰化,已被发现是一种主要的翻译后修饰(PTM),并与细菌中广泛存在的细胞过程调控相关。副溶血性弧菌是一种典型的海洋细菌,可在全球范围内导致人类食源性疾病。我们之前的工作已对副溶血性弧菌的赖氨酸乙酰化进行了广泛表征,在此,我们报告了对该细菌赖氨酸琥珀酰化的首次全局分析以及两种酰化类型之间的重叠情况。使用高精度纳米液相色谱 - 串联质谱联用亲和纯化技术,我们鉴定出了642个蛋白质上匹配的1931个赖氨酸琥珀酰化肽段,琥珀酰化蛋白质的数量占细胞中总蛋白质的13.3%。生物信息学分析结果表明,这些琥珀酰化蛋白质几乎参与了每一个细胞过程,特别是在蛋白质生物合成和代谢过程中,并且分布在不同的亚细胞区室中。此外,还鉴定出了几个序列基序,包括在 -8、-7或 +7位置侧翼为赖氨酸或精氨酸残基且在 -1或 +2位置没有这些残基的琥珀酰赖氨酸,这些基序与在其他细菌和真核细胞中发现的基序不同。此外,还发现288个蛋白质(44.9%)上的总共517个琥珀酰赖氨酸位点(26.7%)也被乙酰化,这表明该细菌中琥珀酰化和乙酰化之间存在广泛重叠。这种系统分析为进一步研究赖氨酸琥珀酰化和乙酰化在副溶血性弧菌中的生理和致病作用提供了一个有前景的起点。

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