malonyl-CoA

malonyl-CoA
Name	Malonyl-CoA

malonyl-CoA is a central two-carbon donor in anabolic metabolism, serving as an activated malonate ester of coenzyme A used broadly in biochemistry and cellular metabolism. It functions at the intersection of pathways studied by researchers from institutions such as the Max Planck Society, National Institutes of Health, and Salk Institute and has been characterized through work at laboratories including Harvard University and Massachusetts Institute of Technology. Studies published in journals like Nature, Science, and Cell detail its roles in organisms ranging from Escherichia coli to Homo sapiens and model systems such as the Mus musculus and Drosophila melanogaster.

Structure and Chemical Properties

Malonyl-CoA is composed of a malonyl moiety esterified to the thiol of coenzyme A, yielding a thioester with resonance-stabilized carboxylate features that influence reactivity in reactions catalyzed by enzymes from the Royal Society-supported biochemical tradition. Its physicochemical attributes—including molecular formula, mass, pKa, and solubility parameters—have been quantified in studies at the European Molecular Biology Laboratory and validated by structural work from groups at Stanford University and University of Cambridge. The thioester linkage confers high group transfer potential comparable to other acyl-CoA species characterized in work associated with Cold Spring Harbor Laboratory and Johns Hopkins University. Spectroscopic characterization using techniques developed at California Institute of Technology and Imperial College London confirms distinct nuclear magnetic resonance and mass spectrometric signatures used across laboratories such as Riken and Max Delbrück Center.

Biosynthesis and Metabolic Pathways

Biosynthesis of malonyl-CoA is catalyzed primarily by acetyl-CoA carboxylase (ACC) enzymes, a topic advanced by researchers at institutions like University of Oxford, University of California, Berkeley, and Yale University. ACC-mediated carboxylation of acetyl-CoA requires biotin and bicarbonate, following mechanistic frameworks elucidated in papers from Princeton University and Columbia University. In bacteria such as Escherichia coli, malonyl-CoA is also generated via acyl carrier protein systems characterized by teams at University of Wisconsin–Madison and University of Tokyo. Alternative routes and compartmentalized production in organelles have been described in reviews from University of Pennsylvania and University College London, linking malonyl-CoA formation to pathways studied at Dana-Farber Cancer Institute and Fred Hutchinson Cancer Center.

Role in Fatty Acid Synthesis and Elongation

Malonyl-CoA functions as the two-carbon donor for fatty acid synthase (FAS) complexes and elongation systems, central themes in research from University of Chicago and ETH Zurich. In eukaryotic cytosolic FAS, iterative condensation of malonyl-derived units produces palmitate; this mechanism was defined in landmark studies affiliated with Rockefeller University and MRC Laboratory of Molecular Biology. Mitochondrial and microsomal elongation pathways employing malonyl-CoA have been investigated by groups at McGill University and University of Melbourne, with implications for lipid remodeling explored at University of Toronto and Monash University. The biochemical logic here connects to foundational enzymology pursued at Max Planck Institute for Molecular Genetics and enzymatic engineering initiatives at ETH Zurich.

Regulation and Enzymatic Control

Regulation of malonyl-CoA pools involves allosteric control, covalent modification, and transcriptional regulation studied across centers such as University of California, San Francisco, University of Michigan, and Karolinska Institute. ACC isoforms are phosphorylated by kinases including AMP-activated protein kinase (AMPK), a signaling node examined in research from Imperial College London and University of Cambridge. Malonyl-CoA decarboxylase (MCD) and transporters influencing malonyl-CoA distribution have been characterized by investigators at University of Washington and University of Basel. Nutrient and hormonal regulation connecting to Vanderbilt University and Duke University investigations tie malonyl-CoA dynamics to broader metabolic control networks described in consortium efforts like those supported by the European Research Council.

Physiological Functions and Tissue Distribution

Tissue-specific concentrations of malonyl-CoA vary, with high synthetic flux in liver, adipose tissue, and lactating mammary gland—findings produced by studies at Cornell University, University of Illinois Urbana–Champaign, and University of California, Davis. Central nervous system roles and hypothalamic signaling studies from Yale School of Medicine and Mount Sinai Hospital link malonyl-CoA to feeding behavior and energy balance. Muscle and mitochondrial pools described in work from Karolinska Institute and Mayo Clinic inform exercise physiology and metabolic flexibility research pursued at University of Birmingham and University of Sydney.

Clinical Significance and Disease Associations

Altered malonyl-CoA metabolism is implicated in metabolic disorders examined by teams at Harvard Medical School, University of Cambridge, and Johns Hopkins School of Medicine. Associations with insulin resistance, nonalcoholic fatty liver disease, and cardiomyopathy have been reported in clinical studies from Cleveland Clinic and Mount Sinai Health System. Genetic defects affecting ACC or MCD pathways have been identified through collaborations involving Broad Institute and Wellcome Trust Sanger Institute. Therapeutic targeting strategies, including ACC inhibitors and modulators, have advanced in translational programs at GlaxoSmithKline, Novartis, and academic spinouts arising from Stanford University.

Detection, Measurement, and Experimental Methods

Measurement of malonyl-CoA employs liquid chromatography–mass spectrometry (LC–MS) platforms standardized in laboratories like Agilent Technologies partner facilities and methods developed at Thermo Fisher Scientific research centers. Stable isotope tracing with 13C-labeled precursors, workflows refined at Argonne National Laboratory and Lawrence Berkeley National Laboratory, and enzymatic assays used by clinical laboratories at Mayo Clinic enable quantification. Imaging and subcellular fractionation protocols from ETH Zurich and University of Oxford support localization studies, while genetic and pharmacologic perturbation approaches have been executed in model organisms at The Jackson Laboratory and European Molecular Biology Laboratory.

Category:Metabolism