Influence of Osmolytes on Protein and Water Structure: A Step To Understanding the Mechanism of Protein Stabilization - Publikacja - MOST Wiedzy

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Influence of Osmolytes on Protein and Water Structure: A Step To Understanding the Mechanism of Protein Stabilization

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Results concerning the thermostability of hen egg white lysozyme in aqueous solutions with stabilizing osmolytes, trimethylamine-N-oxide (TMAO), glycine (Gly), and its N-methyl derivatives, N-methylglycine (NMG), N,N-dimethylglycine (DMG), and N,N,N-trimethylglycine (betaine, TMG), have been presented. The combination of spectroscopic (IR) and calorimetric (DSC) data allowed us to establish a link between osmolytes’ influence on water structure and their ability to thermally stabilize protein molecule. Structural and energetic characteristics of stabilizing osmolytes’ and lysozyme’s hydration water appear to be very similar. The osmolytes increase lysozyme stabilization in the order bulk water < TMAO < TMG < Gly < DMG < NMG, which is consistent with the order corresponding to the value of the most probable oxygen–oxygen distance of water molecules affected by osmolytes in their surrounding. Obtained results verified the hypothesis concerning the role of water molecules in protein stabilization, explained the osmophobic effect, and finally helped to bring us nearer to the exact mechanism of protein stabilization by osmolytes.

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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
JOURNAL OF PHYSICAL CHEMISTRY B nr 117,
ISSN: 1520-6106
Język:
angielski
Rok wydania:
2013
Opis bibliograficzny:
Bruździak P., Panuszko A., Stangret J.: Influence of Osmolytes on Protein and Water Structure: A Step To Understanding the Mechanism of Protein Stabilization// JOURNAL OF PHYSICAL CHEMISTRY B. -Vol. 117, nr. 39 (2013),
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1021/jp404780c
Weryfikacja:
Politechnika Gdańska

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