Impact of Protein N^α-Modifications on Cellular Functions and Human Health

Area of Science:

• Biochemistry and Molecular Biology
• Enzymology
• Proteomics

Background:

• Most human proteins undergo modifications at the α-amino group of newly synthesized polypeptides.
• Methionine aminopeptidases (MAPs) and acetyltransferases initiate N-terminal modifications, influencing subsequent enzymatic reactions.
• These modifications are vital for protein localization, interactions, and stability, with dysregulation linked to human diseases.

Purpose of the Study:

• To review recent advancements in understanding the roles of N-terminal protein modifications.
• To explore the involvement of these modifications in regulating protein functions.
• To highlight the therapeutic potential of targeting enzymes involved in N-terminal modifications for various human diseases.

Main Methods:

• Literature review of recent research on N-terminal protein modifications.
• Analysis of the enzymatic pathways involved in methionine removal and acetylation.
• Examination of the link between dysregulated modifications and human disease pathogenesis.

Main Results:

• N-terminal modifications critically regulate protein localization, protein-protein interactions, protein-DNA interactions, and protein stability.
• Aberrant N-terminal modification pathways are implicated in the development and progression of several human diseases.
• Enzymes catalyzing these modifications represent promising targets for novel therapeutic strategies.

Conclusions:

• N-terminal protein modifications are fundamental to cellular processes and protein homeostasis.
• Understanding these modifications offers insights into disease mechanisms.
• Targeting enzymes involved in N-terminal modifications presents a viable approach for developing new treatments for human diseases.