Potential Involvement of N-Terminal Acetylation in the Quantitative Regulation of the ε Subunit of Chloroplast ATP Synthase under Drought Stress.

The article discusses the results of a study which analyzes the molecular structure and responses of ATP synthase ε subunit and the effect of N-terminal acetylation on its regulation under drought stress in wild watermelon. Mass spectrometry revealed the formation of two isoforms of ε subunit of chloroplast ATP synthase with different isoelectric points. The study cited the presence or absence of an acetyl group at the N-terminus caused the structural differences of the isoforms.