Methods, kits, and compositions for detecting enzyme activity

Chemistry: molecular biology and microbiology – Apparatus – Including measuring or testing

Reexamination Certificate

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Reexamination Certificate

active

07927864

ABSTRACT:
The inventive subject matter relates to methods, kits, and compositions for detecting enzyme activity in a biological sample. In particular, the inventive subject matter relates to methods, kits, and compositions for detecting von Willebrand factor degrading enzyme activity in a biological sample.

REFERENCES:
patent: 2007/0065895 (2007-03-01), Miyata et al.
Kokame et al. “FRETS-VWF73, a first fluorogenic substrate for ADAMTS13 assay”, British Journal of Haematology, 2005, 129:93-100.
Kruger et al. “An economical and preparative orthogonal solid phase synthesis of fluorescein and rhodamine derivatized peptides: FRET substrates for theStaphylococcus aureussortase SrtA transpeptidase reation”, Chem, Commun. 2002:2092-2093.
Kokame et al. British Journal of Haematology 2005;129:93-100.
Zhang Biochem & Biophy Res Communication 2004, 323:674-678.
Zanardelli, et al., ADAMTS13 substrate recognition of von Willebrand factor A2 domain. J Biol Chem. Jan. 20, 2006;281 (3): 1555-63. Epub Oct. 12, 2005.
Sutherland, et al., Molecular modeling of the von Willebrand factor A2 Domain and the effects of associated type 2A von Willebrand disease mutations. J Mol Model. Aug. 2004;10(4):259-70. Epub Aug. 3, 2004.
Hassenpflug, et al., Impact of mutations in the von Willebrand factor A2 domain on ADAMTS13-dependent proteolysis. Blood. Mar. 15, 2006;107(6):2339-45. Epub Dec. 1, 2005.
Kokame, et al., VWF73, a region from D1596 to R1668 of von Willebrand factor, provides a minimal substrate for ADAMTS-13. Blood. Jan. 15, 2004;103(2):607-12. Epub Sep. 25, 2003.
Jenkins, et al., Molecular modeling of ligand and mutation sites of the type A domains of human von Willebrand factor and their relevance to von Willebrand's disease. Blood. Mar. 15, 1998;91(6):2032-44.
Dong, et al., ADAMTS-13 metalloprotease interacts with the endothelial cell-derived ultra-large von Willebrand factor. J Biol Chem. Aug. 8, 2003;278(32):29633-9. Epub May 29, 2003.
Anderson, et al., Zinc and calcium ions cooperatively modulate ADAMTS13 activity. J Biol Chem. Jan. 13, 2006;281 (2):850-7. Epub Nov. 11, 2005.
Majerus, et al., Binding of ADAMTS13 to von Willebrand factor. J Biol Chem. Jun. 10, 2005;280(23):21773-8. Epub Apr. 11, 2005.
Sheffield University VWF Information Homepage, including links to von Willebrand Factor mutations and polymorphisms associated with von Willebrand Diseases; Type 2A mutations: see http://www.ragtimedesign.com/vwf/mutation/mutationtableresults.php; Type 2A polymorphisms: http://www.ragtimedesign.com/vwf/polymorphism/polytableresults.php.

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