Current progress in plant V-ATPase: From biochemical properties to physiological functions

Area of Science:

• Biochemistry
• Plant Biology
• Cell Biology

Background:

• Vacuolar-type adenosine triphosphatase (V-ATPase) is a conserved ATP-driven proton pump found in all eukaryotic cells.
• It comprises two domains: V1 (ATP hydrolysis) and V0 (proton translocation), with at least 13 subunits.
• V-ATPases are vital for plant physiology, influencing growth, development, morphogenesis, and stress responses.

Purpose of the Study:

• To review recent advancements in understanding the biochemical properties of plant V-ATPases.
• To explore the physiological functions of V-ATPases in plants.
• To identify areas requiring further research regarding plant V-ATPase mechanisms.

Main Methods:

• Analysis of distinct V-ATPase mutants in plants.
• In vivo measurements of luminal pH within cellular compartments.
• Literature review of current research on V-ATPase biochemical properties and functions.

Main Results:

• V-ATPases are indispensable for plants, playing key roles in energizing secondary active transport.
• The holoenzyme complex is pivotal for maintaining pH homeostasis in the plant endomembrane system.
• V-ATPases are involved in endocytic and secretory trafficking pathways.

Conclusions:

• Plant V-ATPases are critical for cellular pH regulation and transport processes.
• Further research is needed to fully elucidate the complex biochemical and physiological roles of V-ATPases in plants.
• Understanding V-ATPase function is essential for comprehending plant growth, development, and stress adaptation.