Protein palmitoylation: Palmitoyltransferases and their specificity

Area of Science:

• Biochemistry
• Cell Biology
• Molecular Biology

Background:

• Protein lipidation, specifically S-palmitoylation, is a vital post-translational modification regulating protein trafficking and function.
• The aspartate-histidine-histidine-cysteine motif-containing protein acyltransferases (PATs) catalyze S-palmitoylation via a ping-pong kinetic mechanism.

Purpose of the Study:

• To review the current understanding of protein palmitoylation and depalmitoylation mechanisms.
• To discuss the topology, cellular localization, and regulation of PATs.
• To highlight recent discoveries in depalmitoylating enzymes, such as ABHD17A.

Main Methods:

• Literature review of recent advancements in protein lipidation research.
• Discussion of enzymatic mechanisms involved in palmitoylation and depalmitoylation.
• Analysis of protein acyltransferase (PAT) function and regulation.

Main Results:

• S-palmitoylation is a reversible modification critical for cellular signal transduction.
• The interplay between palmitoylation and depalmitoylation influences membrane organization.
• New insights into depalmitoylating enzymes like ABHD17A have emerged.

Conclusions:

• Understanding protein palmitoylation and depalmitoylation is fundamental to cellular signaling.
• Further research is needed to elucidate the regulation of PATs and depalmitoylating enzymes (APTs).
• This review provides a foundation for future studies on these critical cellular processes.