Human PRMT5 (GenBank Accession No. NM_006109), a.a. 2-end, with N-terminal FLAG-tag, MW=73 kDa, and human MEP50 (GenBank Accession No. NM_024102), a.a. 2-end, with N-terminal His-tag, MW=37 kDa, coexpressed in a Baculovirus infected Sf9 cell expression system.
host species: insect
Host species: insect
Host cell line: Sf9
Background
Three types of arginine methylation exist in mammalian cells: monomethylarginine (MMA), asymmetric dimethylarginine (ADMA) and symmetric dimethylarginine (SDMA). Type I PRMTs ((CARM1, PRMT1, PRMT2, PRMT3, PRMT6, and PRMT8) catalyze ADMA, while type II PRMTs (e.g. PRMTs 5 and 7) catalyze SDMA. Type II PRMTs are found to be strongly implicated in diseases like cancer. For example, PRMT5 plays a role in the repression of certain tumor suppressor genes such as RB tumor suppressors while PRMT7 overexpression is observed in breast cancer
40 mM Tris-HCl, pH 8.0, 110 mM NaCl, 2.2 mM KCl, 80 ug/ml Flag Peptide, and 20% Glycerol.
Species
Human
Application
Useful for the study of enzyme kinetics, screening inhibitors, and selectivity profiling
Notes
50 ul reaction mix (20 mM phosphate buffer pH 7.4, 20 uM S-adenosyl methionine, and 10-100 ng methyltransferase PRMT5) add to the wells coated with the substrate. Incubate at room temperature for 1 hr. Add antibody against methylated R3 residue of histone H4, incubate 1 hr. Add secondary HRP-labeled antibody and incubate 30 min. Finally, add HRP chemiluminescent substrates and read luminesence.