Abstract
Human serum albumin (HSA) is the most abundant protein in human plasma and plays versatile biological role. HSA has been widely used to treat several diseases and develop biocompatible biomaterials for biomedical applications. However, pharmaceutical-grade HSA (p-HSA) showed the altered oxidative and ligand-binding properties compare to native HSA. To investigate the influences of the manufacturing process on the molecular state of HSA, we determined the first crystal structure of p-HSA using the commercial HSA solution without any defatting step and further purification and carried out mass spectrometry to identify bound ligands. The crystal structure of p-HSA revealed that medium- and long-chain fatty acids and tryptophan are bound to p-HSA and one free cysteine is oxidized to cysteine-sulfenic acid. The mass spectra of p-HSA also confirmed the existence of fatty acids and tryptophan in p-HSA. Our results enhance understanding of the molecular state of p-HSA and can be utilized to produce p-HSA solutions and HSA-based biomaterials that has a higher biorelevance.
Original language | English |
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Pages (from-to) | 221-228 |
Number of pages | 8 |
Journal | International Journal of Biological Macromolecules |
Volume | 166 |
DOIs | |
State | Published - 1 Jan 2021 |
Bibliographical note
Funding Information:This work was supported by the Basic Science Research Programmes, 2018R1D1A1B07050781 to DHS and 2018R1D1A1B07050942 to MK, funded by the National Research Foundation of Korea grant granted by the Ministry of Education, Science and Technology, Republic of Korea (MEST). JP is supported by a KIAS Individual Grant ( CG063303 ) at Korea Institute for Advanced Study .
Publisher Copyright:
© 2020 Elsevier B.V.
Keywords
- Crystal structure
- Human serum albumin
- Pharmaceutical-grade albumin