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Updated: Apr 10, 2026

Efficient Purification of Elastin-Like Polypeptides (ELPs) from E. coli Using an Organic Solvent-based Extraction and Precipitation Method
Published on: January 9, 2026
Solvent Properties of Water in Aqueous Solutions of Elastin-Like Polypeptide
Luisa A Ferreira1, James T Cole2, Christian Reichardt3
1Analiza, Inc., Cleveland, OH 44114, USA. Luisa.ferreira@cleveland-diagnostics.com.
Abstract:
The phase-transition temperatures of an elastin-like polypeptide (ELP) with the (GVGVP)40 sequence and solvent dipolarity/polarizability, hydrogen-bond donor acidity, and hydrogen-bond acceptor basicity in its aqueous solutions were quantified in the absence and presence of different salts (Na2SO4, NaCl, NaClO4, and NaSCN) and various osmolytes (sucrose, sorbitol, trehalose, and trimethylamine N-oxide (TMAO)). All osmolytes decreased the ELP phase-transition temperature, whereas NaCl and Na2SO4 decreased, and NaSCN and NaClO4 increased it. The determined phase-transition temperatures may be described as a linear combination of the solvent's dipolarity/polarizability and hydrogen-bond donor acidity. The linear relationship established for the phase-transition temperature in the presence of salts differs quantitatively from that in the presence of osmolytes, in agreement with different (direct and indirect) mechanisms of the influence of salts and osmolytes on the ELP phase-transition temperature.
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