Microarrays of cellulose binding chimeric proteins and methods of use thereof
First Claim
1. An array comprising a plurality of chimeric proteins, each protein comprising a cellulose binding region, wherein the cellulose binding region is devoid of cellulase activity;
- the proteins being immobilized onto discrete locations on a solid surface comprising a polymer capable of binding the cellulose binding region;
with each location having at least one the protein displayed within the location.
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Accused Products
Abstract
The present invention provides microarrays of proteins comprising a cellulose binding region as a means for binding to a cellulase substrate such as cellulose. The cellulose binding region may further contain biologically active exogenous moities introduced therein while maintaining the ability to bind cellulase substrates with high affinity. In addition, methods of construction of the microarrays and using the microarrays are disclosed. The microarrays of the invention are particularly useful for displaying peptide libraries, random or rationally designed, and for high throughput screening for ligands, epitopes or ligand binding sites.
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Citations
62 Claims
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1. An array comprising a plurality of chimeric proteins, each protein comprising a cellulose binding region, wherein the cellulose binding region is devoid of cellulase activity;
- the proteins being immobilized onto discrete locations on a solid surface comprising a polymer capable of binding the cellulose binding region;
with each location having at least one the protein displayed within the location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- the proteins being immobilized onto discrete locations on a solid surface comprising a polymer capable of binding the cellulose binding region;
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20. A method for generating an array comprising a plurality of chimeric proteins comprising a cellulose binding region devoid of cellulase activity wherein the cellulose binding region further contains at least one exogenous peptide introduced therein, comprising the following steps:
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(a) providing a polynucleotide encoding a cellulose binding region;
(b) introducing at least one oligonucleotide sequence encoding at least one exogenous peptide into the polynucleotide of (a) at a predetermined location;
(c) expressing the modified polynucleotide of (b) to obtain a protein comprising a cellulose binding region wherein the cellulose binding region further contains at least one exogenous peptide introduced therein;
(d) determining the binding efficiency of the protein of (c) to a cellulose polymer;
(e) attaching a plurality of proteins of (d) onto discrete locations on a solid support comprising a cellulose polymer to form an array of immobilized proteins; and
(f) determining the exposure of the at least one exogenous peptide contained within the proteins of (d) to the external environment at an accessible orientation. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method for the production of an array comprising a plurality of chimeric proteins comprising a cellulose binding region, wherein each chimeric protein comprises at least one biologically active moiety while maintaining the capacity to bind a cellulose polymer, comprising the steps of:
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(a) providing a polynucleotide comprising a nucleic acid encoding a cellulose binding region devoid of cellulase activity fused to at least one biologically active moiety;
(b) expressing the polynucleotide of (b) to obtain a fusion protein;
(c) determining the binding efficiency of the fusion protein of (b) to a cellulose polymer;
(d) attaching a plurality of fusion proteins of (c) onto discrete locations over a solid support comprising a cellulose polymer to form an array of immobilized fusion proteins; and
(e) determining the exposure of the at least one biological active moiety to the external environment at an accessible orientation.
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32. A method for the production of an array comprising a plurality of chimeric proteins comprising a cellulose binding region capable of binding cellulose polymers with high affinity, wherein each chimeric protein comprises at least one additional biologically active moiety covalently linked to the cellulose binding region while maintaining the capacity to bind a cellulose polymer with high affinity and wherein the at least one biologically active moiety is exposed to the external environment in an accessible orientation while the protein is attached to a solid support, comprising the steps of:
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(a) providing a polynucleotide comprising a nucleic acid encoding a cellulose binding region devoid of cellulase activity;
(b) expressing the polynucleotide of (a) to obtain a protein comprising a cellulose binding region devoid of cellulase activity;
(c) covalently linking the protein of (b) to at least one biologically active moiety to obtain a chimeric protein;
(d) determining the binding efficiency of the chimeric protein of (c) to a cellulose polymer;
(e) attaching a plurality of chimeric proteins of (d) onto discrete locations over a solid support comprising a cellulose polymer to form an array of immobilized chimeric proteins; and
(f) determining the exposure of the at least one biological active moiety to the external environment at an accessible orientation. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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46. A method for screening a plurality of biologically active moieties for interactions with one or more components of a fluid sample comprising the steps of:
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providing a plurality of chimeric proteins immobilized at discrete locations over a solid surface, wherein the surface comprises a cellulose polymer and with the chimeric proteins comprising a cellulose binding region which is devoid of cellulase activity and at least one exogenous peptide introduced therein or at least one biologically active moiety fused or covalently linked thereto thus forming an addressable array of the chimeric proteins at discrete locations such that the at least one exogenous peptide or biologically active moiety is exposed in an accessible orientation;
contacting the array with a sample to be analyzed;
detecting binding interactions between the array and the sample to be analyzed; and
determining the loci of interaction. - View Dependent Claims (47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62)
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Specification