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Schiffer JM, Luo M, Dommer AC, Thoron G, Pendergraft M, Santander MV, Lucero D, Pecora de Barros E, Prather KA, Grassian VH, Amaro RE. Impacts of Lipase Enzyme on the Surface Properties of Marine Aerosols. J Phys Chem Lett 2018; 9:3839-3849. [PMID: 29916254 DOI: 10.1021/acs.jpclett.8b01363] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Triacylglycerol lipases have recently been shown to be transferred from the ocean to the atmosphere in atmospheric sea spray aerosol (SSA). Lipases have the potential to alter the composition of SSA; however, the structure and properties of enzymes in the high salt, high ionic strength, and low pH conditions found in SSA have never been explored. Here, we study the dynamics of Burkholderia cepacia triacylglycerol lipase (BCL) at SSA model surfaces comprised of palmitic acid and dipalmitoylphosphatidic acid (DPPA), two commonly found lipids at SSA surfaces. Surface adsorption Langmuir isotherm experiments and all-atom explicit solvent molecular dynamics simulations together illuminate how and why BCL expands the ordering of lipids at palmitic acid surfaces the most at pH < 4 and the least in DPPA surfaces at pH 6. Taken together, these results represent a first glimpse into the complex interplay between lipid surface structure and protein dynamics within enzyme-containing aerosols.
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Affiliation(s)
- J M Schiffer
- Department of Chemistry and Biochemistry , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0378 , United States
| | - M Luo
- Department of Chemistry and Biochemistry , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0378 , United States
| | - A C Dommer
- Department of Chemistry and Biochemistry , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0378 , United States
| | - G Thoron
- San Diego Met High School , 7250 Mesa College Drive, Room K203 , San Diego , California 92111 , United States
| | - M Pendergraft
- Scripps Institution of Oceanography , University of California, San Diego , La Jolla , California 92093 , United States
| | - M V Santander
- Department of Chemistry and Biochemistry , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0378 , United States
| | - D Lucero
- Scripps Institution of Oceanography , University of California, San Diego , La Jolla , California 92093 , United States
| | - E Pecora de Barros
- Department of Chemistry and Biochemistry , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0378 , United States
| | - K A Prather
- Department of Chemistry and Biochemistry , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0378 , United States
- Scripps Institution of Oceanography , University of California, San Diego , La Jolla , California 92093 , United States
| | - V H Grassian
- Department of Chemistry and Biochemistry , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0378 , United States
- Scripps Institution of Oceanography , University of California, San Diego , La Jolla , California 92093 , United States
- Department of Nanoengineering , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0378 , United States
| | - R E Amaro
- Department of Chemistry and Biochemistry , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0378 , United States
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