Conformational flexibility of fatty acid-free bovine serum albumin proteins enables superior antifouling coatings

July 17, 2020

Bovine serum albumin (BSA) protein is widely used to fabricate antifouling coatings for nanobiotechnology applications. Numerous BSA protein options are commercially available and obtained through different purification methods, however, there is no guidance on which ones are preferable for antifouling coatings. Herein, we investigate the real-time fabrication of antifouling coatings composed of BSA proteins obtained through different purification methods, and report significant differences in ultrathin film coating properties and ability to mitigate serum biofouling and to prevent nanoparticle-induced immune reactions. Mechanistic studies unravel the source of these performance variations, which are related to some BSA proteins containing fatty acid stabilizers while other BSA proteins are fatty acid-free depending on the purification method. Fatty acid-free BSA proteins exhibit greater conformational flexibility and less charge repulsion, which allow them to form more rigidly attached and tightly packed coatings on flat surfaces and nanoparticles that result in superior application performance.


Gamaliel Junren Ma, Abdul Rahim Ferhan, Joshua A. Jackman and Nam-Joon Cho

Published in

Communications Materials


Original publication

Back to all publications

Send us an enquiry.

We’ll get back to you as soon as we can.