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The stabilization o...
The stabilization of S100A9 structure by calcium inhibits the formation of amyloid fibrils
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- Sanders, Ella (författare)
- Centre for Biological Sciences, University of Southampton, Southampton, United Kingdom
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- Csondor, Rebecca (författare)
- Centre for Biological Sciences, University of Southampton, Southampton, United Kingdom
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- Šulskis, Darius (författare)
- Sector of Amyloid Research, Institute of Biotechnology, Life Sciences Centre, Vilnius University, Vilnius, Lithuania
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- Baronaitė, Ieva (författare)
- Sector of Amyloid Research, Institute of Biotechnology, Life Sciences Centre, Vilnius University, Vilnius, Lithuania
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- Smirnovas, Vytautas (författare)
- Sector of Amyloid Research, Institute of Biotechnology, Life Sciences Centre, Vilnius University, Vilnius, Lithuania
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- Maheswaran, Luckshi (författare)
- Centre for Biological Sciences, University of Southampton, Southampton, United Kingdom
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- Horrocks, Jack (författare)
- Centre for Biological Sciences, University of Southampton, Southampton, United Kingdom
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- Munro, Rory (författare)
- Centre for Biological Sciences, University of Southampton, Southampton, United Kingdom
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- Georgiadou, Christina (författare)
- Centre for Biological Sciences, University of Southampton, Southampton, United Kingdom
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- Horvath, Istvan (författare)
- Umeå universitet,Institutionen för medicinsk kemi och biofysik
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- Morozova-Roche, Ludmilla A. (författare)
- Umeå universitet,Institutionen för medicinsk kemi och biofysik
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- Williamson, Philip T. F. (författare)
- Centre for Biological Sciences, University of Southampton, Southampton, United Kingdom
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(creator_code:org_t)
- MDPI, 2023
- 2023
- Engelska.
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Ingår i: International Journal of Molecular Sciences. - : MDPI. - 1661-6596 .- 1422-0067. ; 24:17
- Relaterad länk:
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https://doi.org/10.3...
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- The calcium-binding protein S100A9 is recognized as an important component of the brain neuroinflammatory response to the onset and development of neurodegenerative disease. S100A9 is intrinsically amyloidogenic and in vivo co-aggregates with amyloid-β peptide and α-synuclein in Alzheimer’s and Parkinson’s diseases, respectively. It is widely accepted that calcium dyshomeostasis plays an important role in the onset and development of these diseases, and studies have shown that elevated levels of calcium limit the potential for S100A9 to adopt a fibrillar structure. The exact mechanism by which calcium exerts its influence on the aggregation process remains unclear. Here we demonstrate that despite S100A9 exhibiting α-helical secondary structure in the absence of calcium, the protein exhibits significant plasticity with interconversion between different conformational states occurring on the micro- to milli-second timescale. This plasticity allows the population of conformational states that favour the onset of fibril formation. Magic-angle spinning solid-state NMR studies of the resulting S100A9 fibrils reveal that the S100A9 adopts a single structurally well-defined rigid fibrillar core surrounded by a shell of approximately 15–20 mobile residues, a structure that persists even when fibrils are produced in the presence of calcium ions. These studies highlight how the dysregulation of metal ion concentrations can influence the conformational equilibria of this important neuroinflammatory protein to influence the rate and nature of the amyloid deposits formed.
Ämnesord
- NATURVETENSKAP -- Biologi -- Biofysik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biophysics (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Neurologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Neurology (hsv//eng)
Nyckelord
- Alzheimer’s disease
- amyloid
- neurodegenerative disease
- Parkinson’s disease
- protein stability
- S100A9
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Sanders, Ella
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Csondor, Rebecca
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Šulskis, Darius
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Baronaitė, Ieva
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Smirnovas, Vytau ...
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Maheswaran, Luck ...
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visa fler...
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Horrocks, Jack
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Munro, Rory
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Georgiadou, Chri ...
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Horvath, Istvan
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Morozova-Roche, ...
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Williamson, Phil ...
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- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Biologi
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och Biofysik
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- MEDICIN OCH HÄLSOVETENSKAP
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MEDICIN OCH HÄLS ...
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och Klinisk medicin
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och Neurologi
- Artiklar i publikationen
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International Jo ...
- Av lärosätet
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Umeå universitet