Individually addressable parallel peptide synthesis on microchips.
Miniaturized, spatially addressable microchips of peptides and peptidomimetics are powerful tools for high-throughput biomedical and pharmaceutical research and the advancement of proteomics. Here we report an efficient and flexible method for the parallel synthesis of peptides on individually addressable microchips, using digital photolithography and photogenerated acid in the deprotection step. We demonstrate that we are able to synthesize thousands of peptides in a 1 cm(2) area on a microchip using 20 natural amino acids as well as synthetic amino acid analogs, with high stepwise yields and short reaction-cycle times. Epitope screening experiments using a p53 antibody (PAb240) produced clearly defined binding patterns. The peptidomimetic sequences on the microchip show specific antibody binding and provide insights into the molecular details responsible for specificity of epitope binding. Our approach requires just a conventional synthesizer and a computer-controllable optical module, thereby allowing potential development of peptide microchips for various pharmaceutical and proteomic applications in routine research laboratories.
Department of Chemistry, University of Houston, Houston, TX 77004-5003, USA.
Jean Philippe
JP
Pellois
Xiaochuan
X
Zhou
Onnop
O
Srivannavit
Tiecheng
T
Zhou
Erdogan
E
Gulari
Xiaolian
X
Gao
D000595:Amino Acid Sequence; D000939:Epitopes / Q000032:analysis / Q000235:genetics; D016158:Genes, p53 / Q000235:genetics; D006801:Humans; D008027:Light; D008969:Molecular Sequence Data; D020411:Oligonucleotide Array Sequence Analysis / Q000295:instrumentation / Q000379:methods*; D010455:Peptides / Q000138:chemical synthesis* / Q000235:genetics; D010777:Photochemistry / Q000379:methods*; D015202:Protein Engineering / Q000295:instrumentation / Q000379:methods*; D011786:Quality Control
D000939:Epitopes; D010455:Peptides