Dynamic simulation of cardiolipin remodeling: greasing the wheels for an interpretative approach to lipidomics.
Cardiolipin is a class of mitochondrial specific phospholipid, which is intricately involved in mitochondrial functionality. Differences in cardiolipin species exist in a variety of tissues and diseases. It has been demonstrated that the cardiolipin profile is a key modulator of the functions of many mitochondrial proteins. However, the chemical mechanism(s) leading to normal and/or pathological distribution of cardiolipin species remain elusive. Herein, we describe a novel approach for investigating the molecular mechanism of cardiolipin remodeling through a dynamic simulation. This approach applied data from shotgun lipidomic analyses of the heart, liver, brain, and lung mitochondrial lipidomes to model cardiolipin remodeling, including relative content, regiospecificity, and isomeric composition of cardiolipin species. Generated cardiolipin profiles were nearly identical to those determined by shotgun lipidomics. Importantly, the simulated isomeric compositions of cardiolipin species were further substantiated through product ion analysis. Finally, unique enzymatic activities involved in cardiolipin remodeling were assessed from the parameters used in the dynamic simulation of cardiolipin profiles. Collectively, we described, verified, and demonstrated a novel approach by integrating both lipidomic analysis and dynamic simulation to study cardiolipin biology. We believe this study provides a foundation to investigate cardiolipin metabolism and bioenergetic homeostasis in normal and disease states.
Kiebish
Michael A
MA
Division of Bioorganic Chemistry and Molecular Pharmacology, Washington University School of Medicine, St Louis, MO 63110, USA.
Bell
Rob
R
Yang
Kui
K
Phan
Toan
T
Zhao
Zhongdan
Z
Ames
William
W
Seyfried
Thomas N
TN
Gross
Richard W
RW
Chuang
Jeffrey H
JH
Han
Xianlin
X
D000217:Acyltransferases / Q000378:metabolism; D000818:Animals; D002308:Cardiolipins / Q000737:chemistry* / Q000378:metabolism*; D008297:Male; D013058:Mass Spectrometry; D051379:Mice; D008928:Mitochondria / Q000378:metabolism; D008954:Models, Biological; D009928:Organ Specificity; D015203:Reproducibility of Results; D013237:Stereoisomerism; D013379:Substrate Specificity
D002308:Cardiolipins; D000217:Acyltransferases
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