| Assay Method Information | |
| | Biochemical Assay of the Compounds |
| Description: | Preparation of full-length SARM1 (FL-SARM1) lysate: HEK293T cells (ATCC: CRL-3216) were grown on 150 mm TC-treated dishes to 80-90% confluency in complete DMEM (DMEM (Thermo Fisher: 11965175) supplemented with 10% HI-FBS (VWR: 10802-772), 1x Pen/Strep (Thermo Fisher: 15140122), 1x NEAA (Thermo Fisher: 1140050), 1x glutamax (Thermo Fisher: 35050061), and 1 mM sodium pyruvate (Thermo Fisher: 11360070)) at 37 °C and 5% CO2. One hour prior to transfection, the media was replaced with fresh, 37 °C complete DMEM (20 mL per one 150 mm dish) supplemented with additional 10mM glucose (Alfa Aesar AAJ60067EQE). Per one 150 mm dish, 30 µg FL-SARM1 (SEQ. ID.1; cloned in-house) plasmid was dissolved in 1 mL DMEM at ambient temperature and were mixed by inverting the tube 8-10 times.90 µL of GenJet™ in vitro DNA transfection reagent (Ver2) was dissolved in 1 mL DMEM at ambient temperature and were mixed by inverting the tube 8-10 times. The plasmid and transfection agent solutions were combined, mixed by 8-10 inversions and incubated for 10 minutes at ambient temperature.2 mL of this transfection mixture was added to each dish containing HEK293T cells as prepared above followed by a gentle mixing of 4-5 horizontal rotations. The dishes were incubated at 37^°C and 5% CO2 for 24 h. The dishes were removed from the incubator, the medium was aspirated and the cells were scraped off using cell scrapers in ice-cold 1x PBS (5 mL/dish, Thermo Fisher Scientific 10010023). The collected cells were centrifuged at 300 g for 5 minutes at 4 °C. The supernatant was aspirated and the pellet was frozen at -80 °C until needed. The cell pellet from 30 dishes was dissolved in 30 mL 1x PBS supplemented with 4 tablets of Complete, Mini EDTA-free protease inhibitor cocktail at 4 °C. This mixture was sonicated on ice for 10 minutes at 50% amplitude with a 1 second on/1 second off interval using a Model 120 sonicator (Thermo Fisher Scientific, FB120110). The lysate was centrifuged at 16000 g for 10 minutes at 4 °C. Batches with supernatant possessing NMN-dependent SARM1 activity were selected, pooled, and stored at -80 °C until used in the FL-SARM1 cellular lysate assay described below. |
| Affinity data for this assay | |
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