J
2022
A new fibrillization mechanism of β-lactoglobulin in glycine solutions
JAKLIN, M., Jozef HRITZ a B. HRIBAR-LEE
Základní údaje
Originální název
A new fibrillization mechanism of β-lactoglobulin in glycine solutions
Autoři
JAKLIN, M.,
Jozef HRITZ (703 Slovensko, garant, domácí) a B. HRIBAR-LEE
Vydání
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, NETHERLANDS, ELSEVIER, 2022, 0141-8130
Další údaje
Typ výsledku
Článek v odborném periodiku
Obor
10608 Biochemistry and molecular biology
Stát vydavatele
Nizozemské království
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 8.200
Kód RIV
RIV/00216224:14740/22:00126925
Organizační jednotka
Středoevropský technologický institut
Klíčová slova anglicky
beta-lactoglobulinfl-lactoglobulin; FibrillizationBuffer; specific effects;Spheroid oligomers
Příznaky
Mezinárodní význam, Recenzováno
V originále
Even though amyloid aggregates were discovered many years ago the mechanism of their formation is still a mystery. Because of their connection to many of untreatable neurodegenerative diseases the motivation for finding a common aggregation path is high. We report a new high heat induced fibrillization path of a model protein beta-lactoglobulin (BLG) when incubated in glycine instead of water at pH 2. By combining atomic force microscopy (AFM), transmission emission microscopy (TEM), dynamic light scattering (DLS) and circular dichroism (CD) we predict that the basic building blocks of fibrils made in glycine are not peptides, but rather spheroid oligomers of different height that form by stacking of ring-like structures. Spheroid oligomers linearly align to form fibrils by opening up and combining. We suspect that glycine acts as an hydrolysation inhibitor which consequently promotes a different fibrillization path. By combining the known data on fibrillization in water with our experimental conclusions we come up with a new fibrillization scheme for BLG. We show that by changing the fibrillization conditions just by small changes in buffer composition can dramatically change the aggregation pathway and the effect of buffer shouldn't be neglected. Fibrils seen in our study are also gaining more and more attention because of their pore-like structure and a possible cytotoxic mechanism by forming pernicious ion-channels. By preparing them in a simple model system as BLG we opened a new way to study their formation.
Návaznosti
GF20-05789L, projekt VaV | Název: Charakterizace přirozeně neuspořádaných proteinů | Investor: Grantová agentura ČR, Characterization of intrinsically disordered proteins, Partnerská agentura (Rakousko) |
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Zobrazeno: 17. 11. 2024 14:04