Abstract:
:Elastin-like peptides (ELPs) have been used widely to confer thermoresponsive characteristics onto various materials, but to this point mostly linear ELPs have been studied. A class of linear and dendritic (branched) ELPs based on the GLPGL pentamer repeat unit was synthesized using an on-resin divergent strategy. The effect of peptide topology on the transition temperature (Tt) was examined using circular dichroism to study the peptide secondary structure transition and turbidity to measure the macroscopic phase transition (coacervation). Secondary structure transitions showed no dependence on topology, but a higher Tt was observed for dendritic peptides than for linear peptides with the same number of GLPGL repeats. The data support a phase transition model that consists of two neighboring processes: a secondary structure transition, related to intramolecular interactions, followed by coacervation, associated with intermolecular interactions.
journal_name
Biomacromoleculesjournal_title
Biomacromoleculesauthors
Navon Y,Zhou M,Matson JB,Bitton Rdoi
10.1021/acs.biomac.5b01371subject
Has Abstractpub_date
2016-01-11 00:00:00pages
262-70issue
1eissn
1525-7797issn
1526-4602journal_volume
17pub_type
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