Subcellular proteomics

Area of Science:

• Cell Biology
• Proteomics
• Molecular Biology

Background:

• Eukaryotic cells feature distinct subcellular compartments (organelles) where proteins perform specific functions.
• Protein localization and dynamic movement are vital for cellular processes like signaling, growth, and cell death.
• Aberrant protein localization is linked to various diseases, highlighting the need to study protein distribution.

Purpose of the Study:

• To provide an overview of major spatial proteomics methods for determining protein location, distribution, and abundance within subcellular structures.
• To discuss the workflows, data outputs, applications, and limitations of current spatial proteomics technologies.
• To identify emerging technologies and areas for innovation in spatial proteome characterization.

Main Methods:

• Fluorescent imaging techniques for visualizing protein localization.
• Protein proximity labeling to map protein interactions and locations.
• Organelle purification and biochemical fractionation for isolating and analyzing subcellular components.
• Cell-wide fractionation approaches to capture global protein distribution.

Main Results:

• Spatial proteomics methods enable the mapping of protein localization and dynamics across different cellular states and perturbations.
• These techniques provide insights into protein functions, cellular processes, and disease mechanisms related to mislocalization.
• The review details the practical aspects, applications, and inherent limitations of various spatial proteomics approaches.

Conclusions:

• Spatial proteomics is essential for a comprehensive understanding of cellular organization and function.
• Current methods offer powerful tools but have limitations, necessitating further technological development.
• Advancements in spatial proteomics will enhance our ability to study cell biology and associated diseases.