CO metabolism, sensing, and signaling

Area of Science:

• Biochemistry
• Microbiology
• Cellular Biology

Background:

• Carbon monoxide (CO) is a product of incomplete hydrocarbon combustion.
• Microorganisms use exogenous CO for metabolic processes.
• Eukaryotes utilize endogenous CO in signaling pathways.

Purpose of the Study:

• To review recent advancements in understanding carbon monoxide (CO) metabolism.
• To summarize current knowledge on CO sensing mechanisms.
• To explore the diverse signaling roles of CO in biological systems.

Main Methods:

• Literature review of recent scientific publications.
• Analysis of studies on microbial CO utilization.
• Examination of research on eukaryotic CO signaling pathways.

Main Results:

• Microorganisms metabolize exogenous CO for growth.
• Eukaryotic CO, derived from heme, acts as a neurotransmitter and signaling molecule.
• CO sensors link heme-binding domains to signal transmitters, influencing pathways like soluble guanylate cyclase.

Conclusions:

• CO plays dual roles in biology: metabolic fuel for microbes and signaling molecule in eukaryotes.
• CO sensing involves specialized proteins that transduce signals.
• Low CO concentrations modulate critical cellular signaling pathways, impacting biological functions.