Related Experiment Video
Updated: Apr 16, 2026
10:59
Enrichment of Bacterial Lipoproteins and Preparation of N-terminal Lipopeptides for Structural Determination by Mass Spectrometry
Published on: May 21, 2018
9.5K
Carnitine in bacterial physiology and metabolism
Jamie A Meadows1, Matthew J Wargo1
1Department of Microbiology and Molecular Genetics, University of Vermont College of Medicine, 95 Carrigan Drive, Burlington, VT, 05405, USA.
Microbiology (Reading, England)
|March 20, 2015
Summary
Carnitine protects bacteria from environmental stress and serves as a nutrient. This review details bacterial carnitine metabolism, including its roles in aerobic and anaerobic pathways and as an electron acceptor.
Area of Science:
- Microbiology
- Biochemistry
Background:
- Carnitine is vital in animal tissues for fatty acid transport.
- In bacteria, carnitine functions as an osmoprotectant and enhances stress tolerance (thermotolerance, cryotolerance, barotolerance).
- Bacteria can acquire carnitine intracellularly or synthesize it from precursors.
Purpose of the Study:
- To review current knowledge of carnitine physiology and metabolism in bacteria.
- To highlight recent advancements in understanding bacterial carnitine metabolic pathways.
Main Methods:
- Literature review of scientific publications on bacterial carnitine.
- Analysis of established and emerging carnitine metabolic pathways in prokaryotes.
Main Results:
- Carnitine serves dual roles in bacteria: as a compatible solute for stress protection and as a nutrient source.
- Recent research clarifies aerobic and anaerobic metabolic routes for carnitine.
- The utilization of carnitine as an electron acceptor in bacterial respiration is increasingly understood.
Conclusions:
- Carnitine metabolism in bacteria is diverse, encompassing stress protection and nutrient utilization.
- Advances in understanding aerobic, anaerobic, and electron acceptor roles are resolving key questions in bacterial carnitine physiology.
More Related Videos
09:27Functional Complementation Analysis FCA: A Laboratory Exercise Designed and Implemented to Supplement the Teaching of Biochemical Pathways
Published on: June 24, 2016
18.3K
08:08An Assay for Measuring the Activity of Escherichia coli Inducible Lysine Decarboxyase
Published on: December 19, 2010
14.8K
Related Concept Videos
01:18Amino Acid Catabolism
1.7K
Microorganisms rely on proteins as an essential carbon and energy source, particularly in environments with limited polysaccharides or lipids. However, proteins are too large to cross the plasma membrane unaided, necessitating enzymatic degradation. Microbes secrete extracellular proteases and peptidases that hydrolyze proteins into peptides, which can then be transported across the membrane. Once inside the cell, intracellular proteases degrade these peptides into free amino acids, which...
1.7K
01:25Lipid Catabolism
1.4K
Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
1.4K
01:24Biosynthesis in Bacteria
994
Biosynthesis in bacteria is a fundamental anabolic process that generates essential macromolecules, including proteins, nucleic acids, lipids, and polysaccharides. These macromolecules are critical for cellular growth, replication, and function. The process is tightly regulated and energetically linked to catabolic pathways to ensure optimal resource utilization.Biosynthetic pathways begin with precursor metabolites such as pyruvate, acetyl-CoA, and glucose-6-phosphate derived from glycolysis,...
994
01:26Respiration Pathways
929
Cellular respiration is a fundamental metabolic process that enables organisms to generate energy from organic molecules. One of its central pathways is the tricarboxylic acid (TCA) cycle, also known as the Krebs cycle, which plays a crucial role in energy production and biosynthetic processes.Conversion of Pyruvate to Acetyl-CoAThe pyruvate generated from glycolysis undergoes oxidative decarboxylation by the pyruvate dehydrogenase complex, producing acetyl-CoA, one molecule of NADH, and one...
929
01:29Amino Acid Biosynthetic Pathways
1.7K
Amino acid biosynthesis is essential for cell growth, protein synthesis, and metabolic regulation. Cells generate essential and non-essential amino acids from metabolic intermediates to sustain vital biological functions. These intermediates originate from key metabolic pathways: glycolysis, the tricarboxylic acid (TCA) cycle, and the pentose phosphate pathway. Important precursors include α-ketoglutarate, pyruvate, oxaloacetate, phosphoenolpyruvate, and erythrose-4-phosphate, which...
1.7K
01:28Overview of Fatty Acid Metabolism
37.9K
Lipids also are sources of energy that power cellular processes. Like carbohydrates, lipids are composed of carbon, hydrogen, and oxygen, but these atoms are arranged differently. Most lipids are nonpolar and hydrophobic. Major types include fats and oils, waxes, phospholipids, and steroids.
Fatty acids are catabolized in a process called beta-oxidation, which takes place in the matrix of the mitochondria and converts their fatty acid chains into two-carbon units of acetyl groups. The acetyl...
Fatty acids are catabolized in a process called beta-oxidation, which takes place in the matrix of the mitochondria and converts their fatty acid chains into two-carbon units of acetyl groups. The acetyl...
37.9K