Methods for detecting tyrosine kinase-binding target proteins and identifying substances that affect SH2 phosphorylated ligand regulatory systems
US5858686A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1995 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Oct 4, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2333/9121
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A novel expression cloning method is provided for the detection, identification and purification of target proteins capable of binding at least to a tryosine-phosphorylated domain of a eukaryotic tyrosine kinase using novel peptide probes comprising an amino acid sequence substantially corresponding to a portion of a tyrosine-phosphorylated domain of a tyrosine kinase. The probe has at least one phosphorlated tyrosine residue and may be detectably labeled. Also disclosed is a method for preparing the probe, a method for mapping to a chormosome a gene encoding a protein capable of binding to tyrosine-phosphorylated domains of tyrosine kinases, and a method for purifiying such a protein with the probe. Non-limiting examples of novel proteins discovered using the above cloning method include GRB-1, GRB-2, GRB-3, GRB-4 and GRB-7, as well as nucleic acid encoding these proteins, and methods for detecting these proteins are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.