Modulating Surface Density of Proteins via Caged Surfaces and Controlled Light Exposure

被引:23
作者
Alvarez, Marta [1 ]
Alonso, Jose Maria [2 ]
Filevich, Oscar [3 ]
Bhagawati, Maniraj [4 ]
Etchenique, Roberto [3 ]
Piehler, Jacob [4 ]
del Campo, Aranzazu [1 ]
机构
[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
[2] Max Planck Inst Met Res, D-70569 Stuttgart, Germany
[3] Univ Buenos Aires, Fac Ciencias Exactas & Nat, INQUIMAE, Dept Quim Inorgan Analit & Quim Fis, Buenos Aires, DF, Argentina
[4] Univ Osnabruck, D-49076 Osnabruck, Germany
关键词
SELF-ASSEMBLED MONOLAYERS; SOLUTION PHOTOGENERATED ACIDS; HISTIDINE-TAGGED PROTEINS; PROTECTING GROUPS; FUNCTIONAL IMMOBILIZATION; OLIGONUCLEOTIDE ARRAYS; DIRECTED SYNTHESIS; MICROMIRROR ARRAY; CELL-ADHESION; RGD PEPTIDES;
D O I
10.1021/la104511x
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We demonstrate the possibility of tuning the degree of functionalization of a surface using photoactivatable chemistries and controlled light exposure. A photosensitive organosilane with a protected amine,terminal group and a tetraethyleneglycol spacer was synthesized. A o-nitrobenzyl cage was used as the photoremovable group to cage the amine functionality. Surfaces with phototunable amine densities were generated by controlled irradiation of silica substrates modified with the photosensitive anchor. Protein layers with different densities could be obtained by successive coupling and assembly steps. Protein surface concentrations were quantified by reflectance interference. Our results demonstrate that the protein density correlates with the photogenerated ligand density. The density control was proved over four coupling steps (biotin, SAv, (BT)tris-NTA, MBP, or GFP), indicating that the interactions between underlying layer and soluble targets are highly specific and the immobilized targets at the four levels maintain their full functionality. Protein micropattems with a gradient of protein density were also obtained.
引用
收藏
页码:2789 / 2795
页数:7
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