Illuminating the Cell's Biochemical Activity Architecture.

Area of Science:

• Cellular biology
• Biochemistry
• Microscopy

Background:

• Cellular behaviors depend on coordinated intracellular biochemical pathways.
• Fluorescence imaging has revolutionized the study of these processes over the last two decades.
• Understanding molecular underpinnings of biological function is critical.

Purpose of the Study:

• To highlight recent imaging studies providing insights into molecular activity within cells.
• To emphasize the role of spatiotemporal regulation of biochemical processes.
• To present the emerging concept of biochemical activity architecture.

Main Methods:

• Utilizing advances in fluorescence imaging, including genetically encoded fluorescent reporters.
• Employing new imaging technologies for real-time observation.
• Analyzing studies that detail the location and activity of molecules within living cells.

Main Results:

• Cells achieve specific biological outcomes through spatial control of biomolecule distribution and activity.
• Biochemical activity compartmentalization is pervasive across various spatial scales within cells.
• Imaging studies offer detailed insights into where molecules are active, not just where they are located.

Conclusions:

• The spatial organization of biochemical activity is a fundamental aspect of cellular function.
• Biochemical activity architecture complements the physical architecture of a cell.
• Real-time imaging provides unprecedented views into the dynamic nature of cellular processes.