Effects of chain length on oligopeptide hydrogelation

Marc B. Taraban, Sivakumar Ramachandran, Ignacy Gryczynski, Zygmunt Gryczynski, Jill Trewhella, Yihua Bruce Yu

Research output: Contribution to journalArticle

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Abstract

The co-assembly of mutually complementary, but self-repulsive oligopeptide pairs into viscoelastic hydrogels has been studied. Oligopeptides of 6, 10, and 14 amino acid residues were used to investigate the effects of peptide chain length on the structural and mechanical properties of the resulting hydrogels. Biophysical characterizations, including dynamic rheometry, small-angle X-ray scattering (SAXS) and fluorescence spectroscopy, were used to investigate hydrogelation at the bulk, fiber, and molecular levels, respectively. Upon mixing, the 10-mer peptides and the 14-mer peptides both form hydrogels while the 6-mer peptides do not. SAXS studies point to morphological similarity of the cross-sections of fibers underlying the 10:10 and 14:14 gels. However, fluorescence spectroscopy data suggest tighter packing of the amino acid side chains in the 10:10 fibers. Consistent with this tighter packing, dynamic rheometry data show that the 10:10 gel has much higher elastic modulus than the 14:14-mer (18 kPa vs. 0.1 kPa). Therefore, from the standpoint of mechanical strength, the optimum peptide chain length for this class of oligopeptide-based hydrogels is around 10 amino acid residues.

Original languageEnglish
Pages (from-to)2624-2631
Number of pages8
JournalSoft Matter
Volume7
Issue number6
DOIs
StatePublished - 21 Mar 2011

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Oligopeptides
Chain length
Hydrogels
peptides
Peptides
amino acids
Fluorescence spectroscopy
X ray scattering
Amino Acids
fibers
Fibers
Gels
gels
fluorescence
scattering
spectroscopy
Strength of materials
Structural properties
modulus of elasticity
x rays

Cite this

Taraban, M. B., Ramachandran, S., Gryczynski, I., Gryczynski, Z., Trewhella, J., & Yu, Y. B. (2011). Effects of chain length on oligopeptide hydrogelation. Soft Matter, 7(6), 2624-2631. https://doi.org/10.1039/c0sm00919a
Taraban, Marc B. ; Ramachandran, Sivakumar ; Gryczynski, Ignacy ; Gryczynski, Zygmunt ; Trewhella, Jill ; Yu, Yihua Bruce. / Effects of chain length on oligopeptide hydrogelation. In: Soft Matter. 2011 ; Vol. 7, No. 6. pp. 2624-2631.
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Taraban, MB, Ramachandran, S, Gryczynski, I, Gryczynski, Z, Trewhella, J & Yu, YB 2011, 'Effects of chain length on oligopeptide hydrogelation', Soft Matter, vol. 7, no. 6, pp. 2624-2631. https://doi.org/10.1039/c0sm00919a

Effects of chain length on oligopeptide hydrogelation. / Taraban, Marc B.; Ramachandran, Sivakumar; Gryczynski, Ignacy; Gryczynski, Zygmunt; Trewhella, Jill; Yu, Yihua Bruce.

In: Soft Matter, Vol. 7, No. 6, 21.03.2011, p. 2624-2631.

Research output: Contribution to journalArticle

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