Article
Chemistry, Multidisciplinary
Soumav Nath, Priti Roy, Raki Mandal, Rajat Roy, Alexander K. Buell, Neelanjana Sengupta, Pradip K. Tarafdar
Summary: The study demonstrates the potential anti-amyloidogenic properties of endogenously derived compounds based on porphyrin, which can inhibit fibril formation of insulin and hen egg white lysozyme. Hematoporphyrin, derived from heme by hydroxylation and metal removal, shows superior inhibitory effects on insulin fibril formation compared to hemin and protoporphyrin.
CHEMISTRY-AN ASIAN JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Yu Zhang, Yuying Liu, Wenhui Zhao, Yunxiang Sun
Summary: The study demonstrates that SWCNT-OH has excellent anti-amyloid properties, inhibiting the fibrillization of beta 2m(21)(-)(31) peptides and destroying pre-formed proto-fibrils.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Multidisciplinary Sciences
Yuechuan Xu, Kaitlin Knapp, Kyle N. Le, Nicholas P. Schafer, Mohammad S. Safari, Aram Davtyan, Peter G. Wolynes, Peter G. Vekilov
Summary: The research delves into the molecular pathways of amyloid fibrillization, revealing the presence of a complex at the fibril tip supported by nonnative contacts that hinder fibril growth. It also uncovers the dynamics of coupled structuring and assembly during fibril growth, which are more intricate than during the folding of most globular proteins.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Biochemistry & Molecular Biology
Vladimir Vanik, Zuzana Bednarikova, Gabriela Fabriciova, Steven S. -S. Wang, Zuzana Gazova, Diana Fedunova
Summary: Amyloid fibrils can be modulated by ionic liquids, and the speed and morphology of fibrillization depend on the concentration and type of ions. The presence of different ions in ionic liquids can promote or hinder the formation of amyloid fibrils. The specific protein-ion interactions and long-range electrostatic shielding play important roles in the impact of ionic liquids.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Andrii S. Kurochka, Dmytro A. Yushchenko, Petr Bour, Volodymyr V. Shvadchak
Summary: The presence of lipids significantly delays the fibrillization process of the alpha-Synuclein protein, with membrane-bound protein not being involved in fibril elongation.
ACS CHEMICAL NEUROSCIENCE
(2021)
Article
Multidisciplinary Sciences
Ketaki D. Belsare, Haifan Wu, Dibyendu Mondal, Annalise Bond, Erika Castillo, Jia Jin, Hyunil Jo, Addison E. Roush, Kala Bharath Pilla, Andrej Sali, Carlo Condello, William F. DeGrado
Summary: The soluble form of TREM2, sTREM2, was found to bind to fibrillar A1340 and A1342, enhancing their uptake into cells. sTREM2 inhibited the secondary nucleation step in A13 fibrillization, but had little effect on the primary nucleation pathway. The disease-associated mutant R47H showed reduced uptake and functional responses to fibrils. Molecular modeling revealed the binding mode of sTREM2 to A13 fibrils.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Applied
Kefan Ouyang, Hexiang Xie, Yufeng Wang, Fangjian Ning, Hua Xiong, Qiang Zhao
Summary: This study investigates the effects of pH, temperature, and protein concentration on the deterioration reactions and color formation during the fibrillization of whey protein isolate fibrils. The results indicate that protein oxidation and the Maillard reaction play a role in the color formation of the fibrils.
FOOD HYDROCOLLOIDS
(2023)
Article
Chemistry, Multidisciplinary
Wujoon Cha, Chaejeong Heo, Sanghyub Lee, Seok Joon Yun, Byeong Wook Cho, Taewoo Ha, Young Hee Lee
Summary: Charge transfer during the fibrillization of A ss proteins was investigated using Raman spectroscopy. The study revealed that small A ss monomers withdraw electrons, while fibrils donate electrons to graphene and molybdenum disulfide. Oligomers undergo transient charge states near the neutrality point.
Article
Biochemistry & Molecular Biology
A. Antosova, M. Gancar, Z. Bednarikova, J. Marek, D. Zahn, S. Dutz, Z. Gazova
Summary: The surface modifications of nanoparticles have significant impact on the aggregation of proteins, specifically on the amyloid fibrillization process. COAT-MNPs were found to inhibit HEWL fibrillization and destroy mature fibrils, with TC-MNPs demonstrating the highest efficacy among the nanoparticles studied.
BIOCHIMICA ET BIOPHYSICA ACTA-GENERAL SUBJECTS
(2021)
Article
Biochemistry & Molecular Biology
Ya-Ping Chuang, Yu-Pei Chang, Ling-Hsien Tu
Summary: The aggregation of proteins or peptides greatly limits their bioavailability, making it difficult to inhibit using small molecules or biocompatible materials. However, a previous study found that modifying certain residues in human calcitonin (hCT) can effectively suppress peptide aggregation. The modified hCT, known as double mutant hCT (DM hCT), acts as a good inhibitor and is biologically active in interacting with the calcitonin receptor. Creating peptide fragments based on the DM hCT sequence further revealed that the formation of a helix structure may contribute to its inhibitory effect.
Article
Spectroscopy
Fakhteh Aliakbari, Farnoosh Attar, Monireh Movahedi, Mojtaba Falahati
Summary: This study investigated the acceleratory effect of magnesium oxide nanoparticles (MgO NPs) on the amyloid fibrillization of human tau protein. The results showed that MgO NPs could significantly promote tau fibrillization and increase neurotoxicity against N2a neuron-like cells.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Biochemistry & Molecular Biology
Sain Singh, Govinda R. Navale, Sonia Agrawal, Haobam Kisan Singh, Labhini Singla, Dhiman Sarkar, Manabendra Sarma, Anghuman Roy Choudhury, Kaushik Ghosh
Summary: Misfolding and aggregation of proteins are associated with neurodegenerative disorders. This study synthesized novel ruthenium complexes and investigated their inhibitory activity against protein aggregation and amyloid formation. The complexes showed significant inhibition of protein aggregation and amyloid fibril formation.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Materials Science, Multidisciplinary
Yatao Pan, Guangjing Hou, Xiaojuan Wang, Xia Ran, Pingan Liu, Lijun Guo
Summary: Synthesized and characterized nitrogen and fluorine co-doped graphene quantum dots (N, F-GQDs) effectively inhibit the fibrillization of Amyloid-beta peptide (1-42) (A beta 42). Strong adsorption of A beta 42 on N, F-GQDs reduces beta-sheet structures and cytotoxicity. N, F-GQDs demonstrate good adaptability to resist pH value fluctuations and interference of divalent metal ions.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Yi-Shan Wu, Shing-Jong Huang, Meng-Hsin Wu, Ling-Hsien Tu, Ming-Che Lee, Jerry Chun Chung Chan
Summary: The aggregation of Aβ(40) and Aβ(42) plays a crucial role in the pathogenesis of Alzheimer's disease. In this study, reverse micelles formed by sodium bis(2-ethylhexyl) sulfosuccinate (AOT) were used to prepare oligomeric aggregates of Aβ(40) or Aβ(42) peptides. The resulting globular aggregates had a diameter of approximately 22 nm and were capable of forming mature fibrils through self-aggregation. Furthermore, it was found that Aβ(42) oligomeric aggregates could seed the fibrillization of Aβ(40) monomers. Solid-state NMR results revealed a similar molecular structure near the C-terminus for Aβ(40) fibrils seeded by either Aβ(40) or Aβ(42) oligomers.
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2022)
Article
Biochemistry & Molecular Biology
Jiao Ge, Cuixia Sun, Saiya Li, Nianxiang Deng, Yin Zhang, Yapeng Fang
Summary: This study investigated the fibrillization kinetics and rheological behaviors of panda bean protein isolate (PBPI) at pH 2.0 and 90 degrees C. Results showed the formation of two distinct classes of fibrils after heating for 10 hours, including flexible and rigid fibrils. The secondary structural changes during fibril formation were monitored, and it was found that PBPI-derived fibrils showed extremely high viscosity and storage modulus. These findings provide useful information for manipulating the formation of legume proteins-based fibrils and exploring their potential applications in the future.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biochemistry & Molecular Biology
Katrina Laks, Tiina Kirsipuu, Tuuli Dmitrijeva, Andres Salumets, Peep Palumaa
Article
Multidisciplinary Sciences
Jekaterina Krishtal, Olga Bragina, Kristel Metsla, Peep Palumaa, Vello Tougu
Article
Multidisciplinary Sciences
Julia Smirnova, Ekaterina Kabin, Ivar Jarving, Olga Bragina, Vello Tougu, Thomas Plitz, Peep Palumaa
SCIENTIFIC REPORTS
(2018)
Article
Biochemistry & Molecular Biology
Julia Smirnova, Ekaterina Kabin, Vello Tougu, Peep Palumaa
Article
Neurosciences
Jekaterina Krishtal, Kristel Metsla, Olga Bragina, Vello Tougu, Peep Palumaa
JOURNAL OF ALZHEIMERS DISEASE
(2019)
Article
Biochemistry & Molecular Biology
Merlin Friedemann, Vello Tougu, Peep Palumaa
Article
Chemistry, Multidisciplinary
Elina Berntsson, Merlin Sardis, Andra Noormagi, Juri Jarvet, Per M. Roos, Vello Tougu, Astrid Graslund, Peep Palumaa, Sebastian K. T. S. Warmlander
Summary: Mercury intoxication has more severe effects on individuals with the APOE-e4 gene, possibly due to the ApoE4 protein's poorer ability to clear heavy metals compared to the ApoE2 and ApoE3 variants. In vitro experiments showed that Hg(I) ions have weak interactions with all ApoE variants and induce no significant structural changes. Hg(II) ions, on the other hand, bind strongly to all three ApoE isoforms and cause alterations in their superhelicity, with the most pronounced effects observed in the ApoE4 protein.
Article
Chemistry, Multidisciplinary
Andra Noormagi, Tatjana Golubeva, Elina Berntsson, Sebastian K. T. S. Warmlander, Vello Tougu, Peep Palumaa
Summary: Copper is an essential biometal that serves as a cofactor in many proteins. ATCUN motifs, small peptide sequences, can bind to copper ions. These motifs are present in various proteins and peptides and play a role in copper metabolism. The binding affinity of ATCUN peptides can vary greatly. In this study, it was demonstrated that ATCUN motifs have similar affinity to HSA for binding copper ions in blood and cerebrospinal fluid.
Meeting Abstract
Biochemistry & Molecular Biology
J. Smirnova, E. Golendukhina, I. Jarving, V. Tougu, T. Plitz, P. Palumaa