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Recombinant full length protein (Human) corresponding to the full expressed region of the human Sumo 1 precursor.
This product can be used as part of an assay for sumoylation activity. Human Aos 1 + Uba 2 (ab3804), Ubc 9 (ab3803) and Sumo 1 (ab3801) can be used to promote in vitro sumoylation of a sumoylation marker (human Topoisomerase I protein fragment) (ab3828). The reaction products can be detected using our Sumo 1 (ab3819 and ab3824) and Topoisomerase I (ab3825) antibodies. Sumoylation assays are carried out in a final volume of 20µl in reaction conditions (20 mM Hepes pH 7.5, 5mM MgCl2, 2mM ATP). Sumoylation Protocol: 1. Prepare a suitable purified substrate protein. (For the control, use 2µl Topoisomerase I marker for each reaction.) 2. In each reaction, add 4µl E2 to substrate first, then 2µl Sumo 1, 2µl 10x reaction buffer, 2µl E1. Finally, add H2O to bring up to 20µl. We would recommend adding fresh 2mM ATP to be sure that sufficient energy is supplied. 3. The best reaction concentration of proteins is as following: Aos 1 + Uba 2: 7.5µg/ml. Ubc 9: 50µg/ml. SUMO 1: 50µg/ml. For the control assay we recommend running the assay at 37ºC for 30-60 minutes. 4. Detect the reaction products by Western blot using a suitable antibody. For the control reaction use 1/1000 dilution of the supplied Topoisomerase I antibody. Four sumoylated bands should be seen on the gel for the control reaction. This assay has been shown to work with crude extracts. Be aware that Uba 2 contains his-rich regions which might cross-react with antibodies against the 6x-His epitope tag. During western analysis with anti-6x-His antibodies, Uba 2 at 80 kDa might be shown.
Our Abpromise guarantee covers the use of ab3819 in the following tested applications.
|WB||1/1000. Detects a band of approximately 12 kDa.
60 minute incubation at 25°C.
Left lane: Western blot (12.5% gel) of sumoylated Topo I protein with Topo I antibody T8N.
Right lane: Western blot of sumoylated Topo I protein with ab3819.
Both primaries were used a dilution of 1/1000 (60 minutes at 25°C).
Topo I protein has multiple sumoylation sites. Four sumoylated Topo I can be seen by Topo I antibody and seven sumoylated Topo I can be seen by Sumo I antibody.
ab3819 has not yet been referenced specifically in any publications.