Chemoselective immobilization of peptides on abiotic and cell surfaces at controlled densities.

Chemoselective immobilization of peptides on abiotic and cell surfaces at controlled densities.
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DOI:
10.1021/la101192v
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发表时间:
2010-06-01
期刊:
Langmuir : the ACS journal of surfaces and colloids
影响因子:
--
通讯作者:
Chaikof EL
Chaikof EL
中科院分区:
其他
文献类型:
--
作者:
Krishnamurthy VR;Wilson JT;Cui W;Song X;Lasanajak Y;Cummings RD;Chaikof EL

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We report herein a new and enabling approach for decorating both living and abiotic surfaces with the extracellular matrix IKVAV peptide in a site-specific manner using strain promoted azide-alkyne cycloaddition. A cyclooctyne derivatized IKVAV peptide was synthesized and immobilized on the surface of pancreatic islets through strain-promoted azide-alkyne cycloaddition with cell surface azides generated by electrostatic adsorption of cytocompatible poly(L-lysine)-graft-poly(ethylene glycol) (PLL-g-PEG) copolymer bearing azido groups (PP-N3). Both “one-pot” and sequential addition of PP-N3 and a cyclooctyne derivatized IKVAV peptide conjugate enabled efficient modification of pancreatic islet surface in less than 60 min. The ability to bind peptides at controlled surface densities was demonstrated in a quantitative manner using microarrays. Additionally, the technique is remarkably rapid and highly efficient, opening new avenues for molecular engineering of cellular interfaces and protein and peptide microarrays.
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