Premium
Generating addressable protein microarrays with PROfusion™ covalent mRNA‐protein fusion technology
Author(s) -
Weng Shawn,
Gu Ke,
Hammond Philip W.,
Lohse Peter,
Rise Cecil,
Wagner Richard W.,
Wright Martin C.,
Kuimelis Robert G.
Publication year - 2002
Publication title -
proteomics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.26
H-Index - 167
eISSN - 1615-9861
pISSN - 1615-9853
DOI - 10.1002/1615-9861(200201)2:1<48::aid-prot48>3.0.co;2-i
Subject(s) - fusion protein , dna microarray , protein microarray , messenger rna , nucleic acid , translation (biology) , biology , microbiology and biotechnology , protein biosynthesis , oligonucleotide , microarray , computational biology , chemistry , dna , biochemistry , gene , gene expression , recombinant dna
An mRNA‐protein fusion consists of a polypeptide covalently linked to its corresponding mRNA. These species, prepared individually or en masse by in vitro translation with a modified mRNA conjugate (the PROfusion™ process), link phenotype to genotype and enable powerful directed evolution schemes. We have exploited the informational content of the nucleic acid component of the mRNA‐protein fusion to create an addressable protein microarray that self‐assembles via hybridization to surface‐bound DNA capture probes. The nucleic acid component not only directs the mRNA‐protein fusion to the proper coordinate of the microarray, but also positions the protein in a uniform orientation. We demonstrate the feasibility of this protein chip concept with several mRNA‐protein fusions, each possessing a unique peptide epitope sequence. These addressable proteins could be visualized on the microarray both by autoradiography and highly specific monoclonal antibody binding. The anchoring of the protein to the chip surface is surprisingly robust, and the system is sensitive enough to detect sub‐attomole quantities of displayed protein without signal amplification. Such protein arrays should be useful for functional screening in massively parallel formats, as well as other applications involving immobilized peptides and proteins.