, Volume 52, Issue 8, pp 711–727 | Cite as

Differential Interaction of Myoglobin with Select Fatty Acids of Carbon Chain Lengths C8 to C16

  • Thomas Jue
  • Lifan Shih
  • Youngran Chung
Original Article


Previous studies have shown that palmitic acid (PAM) and oleic acid (OLE) can bind myoglobin (Mb). How fatty acids (FA) with different carbon chain lengths and sulfate substitution interact with Mb remains uncertain. Indeed, C8:0 and C10:0 fatty acids do not perturb the intensities of the 1H-NMR MbCN signal intensity at FA:Mb ratios below 2:1. Starting with C12:0, C12:0-C16:0, FA induce a noticeable spectral change. C12:0 and C14:0 FA affect both the 5- and 8-heme methyl signals, whereas the C16:0 FA perturbs only the 8-heme methyl signal. All C12:0–C16:0 saturated FA induce upfield shifts in the –CH2 peak of different FA in the presence of Mb. Increasing the apparent solubility with a sulfate group substitution enhances the FA interaction of lauric sulfate (LAU 1-SO4) but not palmitate sulfate acid (PAM 1-SO4). The detergent (DET) property of FA has no significant contribution. Common positive, neutral, and negative DET at DET:Mb ratio of 1:1 induce no perturbation of the MbCN spectra. The experiment observations establish a basis to investigate the molecular mechanism underlying the FA interaction with Mb.


Lipid Lipid–protein interaction Fatty acid NMR Metabolism Bioenergetics Hydrophobicity Detergent 



Fatty acid(s)


Octanoic acid, C8:0


Decanoic acid, C10:0


Lauric acid, C12:0


Myristic acid, C14:0


Palmitic acid, C16:0


Lauryl sulfate


Palmityl sulfate


Fatty acid binding protein







We gratefully acknowledge funding support from NIH GM 58688 (TJ), the guidance of Dr. Ulrike Kreutzer, and scientific discussion with Clayton Germolus and Jessica Gregory.


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Copyright information

© AOCS 2017

Authors and Affiliations

  1. 1.Department of Biochemistry and Molecular MedicineUniversity of California DavisDavisUSA

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