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Conformational Consequences for Compatible Osmolytes on Thermal Denaturation.

Nimesh Shukla1, Brianna Bembenek2, Erika A Taylor3

  • 1Department of Physics, Wesleyan University, Middletown, CT 06459, USA.

Life (Basel, Switzerland)
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PubMed
Summary
This summary is machine-generated.

Compatible osmolytes like sugars stabilize proteins against stress. Differences in their structure, specifically glycosidic bonds, affect their effectiveness in biopreservation, influencing protein stability and hydration.

Keywords:
compatible osmolytedisaccharidehydration dynamicsthermal denaturationtime-dependent Stokes shift

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Area of Science:

  • Biochemistry
  • Biophysics
  • Materials Science

Background:

  • Compatible osmolytes are crucial for protein stabilization in biological systems.
  • Understanding the molecular basis of osmolyte effectiveness is key for biopreservation applications.
  • Existing research highlights the role of osmolytes in combating environmental stress but lacks detailed molecular insights.

Purpose of the Study:

  • To investigate the molecular features that determine the efficacy of compatible osmolytes in protein stabilization.
  • To compare the biopreservation and hydration properties of trehalose, maltose, and gentiobiose, which differ in glycosidic bonds.
  • To elucidate the relationship between preferential exclusion and the stabilizing capacity of disaccharides.

Main Methods:

  • Utilized time-resolved and steady-state spectroscopic techniques.
  • Employed molecular simulation methods.
  • Analyzed the biopreservation and hydration of trehalose, maltose, and gentiobiose.

Main Results:

  • Disaccharides with different glycosidic bonds exhibit varying degrees of stabilization against thermal denaturation.
  • The extent of preferential sugar exclusion correlates with the observed differences in protein stabilization.
  • Trehalose, maltose, and gentiobiose show distinct hydration and biopreservation capabilities.

Conclusions:

  • Glycosidic bond variations in disaccharides significantly impact their protein-stabilizing potential.
  • Preferential exclusion is a key mechanism underlying the differential effectiveness of compatible osmolytes.
  • These findings provide molecular insights into designing superior biopreservation agents.