Determination of the optimal connector length to enhance stability of backbone-circularized granulocyte colony-stimulating factor.

FEBS Open Bio

Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Japan.

Published: October 2023

AI Article Synopsis

  • Improving protein stability is crucial for industrial uses, with backbone circularization being a promising technique to achieve this.
  • The study aimed to find the optimal connector length for granulocyte colony-stimulating factor by systematically altering residues and testing thermal stability.
  • Analysis showed that evaluating helix length, backbone angle, and hydrogen bond properties can effectively identify more stable connector lengths.

Article Abstract

Improving protein stability is important for industrial applications, and one promising method for achieving this is backbone circularization. As connector length affects stability, predicting and elucidating a more stable connector length is necessary for development of the backbone circularization method. However, the relationship between connector length and protein stability has not been completely elucidated. Here, we determined the most stable connector length for granulocyte colony-stimulating factor by changing one residue at a time to produce connector length variants and then measuring their thermal stability. Analysis of the local structures obtained from the predicted structures of the circularized variants revealed that an approach using helix length, dihedral backbone angle, and number of unbonded hydrogen bond donors and acceptors is suitable for identifying connector lengths with higher stability.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10549227PMC
http://dx.doi.org/10.1002/2211-5463.13692DOI Listing

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