Systematic Analysis of Lysine Succinylation in Streptococcus mutans

Area of Science:

• Microbiology
• Biochemistry
• Molecular Biology

Background:

• Lysine succinylation (Ksuc) is an emerging post-translational modification (PTM) regulating bacterial functions.
• Streptococcus mutans is a major pathogen causing dental caries, but its Ksuc profile remains uncharacterized.

Purpose of the Study:

• To investigate the global lysine succinylome in Streptococcus mutans.
• To compare Ksuc patterns between planktonic and biofilm growth states.
• To explore the relationship between Ksuc and other PTMs like lysine acetylation.

Main Methods:

• Global proteomic analysis to identify succinylated lysine sites.
• Quantitative mass spectrometry to compare Ksuc in different growth conditions.
• Bioinformatic analysis to categorize modified proteins and pathways.

Main Results:

• Identified 2250 succinylated sites across 580 proteins in S. mutans.
• Observed significant alterations in Ksuc substrates between planktonic and biofilm states.
• Found extensive overlap between lysine succinylation and acetylation, particularly in proteins involved in biofilm formation and metabolism.

Conclusions:

• This study provides the first comprehensive map of the lysine succinylome in S. mutans.
• Ksuc plays a significant role in regulating S. mutans physiology and virulence, especially during biofilm development.
• The interplay between Ksuc and acetylation offers new insights into bacterial adaptation and pathogenicity.