TOR | Target of rapamycin
AS12 2608 | Clonality: Polyclonal | Host: Rabbit | Reactivity: Arabidopsis thaliana, Zea mays
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10 of Arabidopsis thaliana 10dag (day-after-germination) seedlings grown on MS agar plate were homogenised in 1.5 Eppis (safe-lock) in Precellys machine (glass beads + N2 liquid) 2x 7'' at max speed. 100uL of 1.5x (Laemmli buffer + 10% BME) was added and samples were boiled at 95C for 5 minutes followed by a 15 minutes centrifugation at max rpm, was loaded in the amount of 40uL per lane and separated on 8% SDS-PAGE. Blotting was done for 1 h at 100 V to PVDF using tank transfer. Blots were blocked with 2 % BSA in 1xPBS-Tween20 0.1% for 1h at RT with agitation. Blot was incubated in the primary antibody at a dilution of 1: 5 000 in 1x PBS-Tween 20 0.1% over night at 4C with agitation. The antibody solution was decanted and the blot was briefly rinsed, then washed 3 times for 10 min in 1xPBS-Tween20 0.1% at RT with agitation. Blot was incubated in secondary antibody (anti-rabbit IgG horse radish peroxidase conjugated) diluted to 1:20 000 in 1xPBS-Tween20 0.1% for 2h at RT with agitation. The blot was washed as above and developed for 1 minute chemiluminescent detection reagent. Exposure time was 30 seconds.
Courtesy of Dr. Mikhail Schepetilnikov, Institut de Biologie Moléculaire des Plantes, CNRS, France
25 mg total protein extract (35S:Raptor-ProtG) was incubated with IgG magnetic beads for 50 minutes. After washing, complexes were eluted, concentrated by speedvac and pellet was dissolved in 30uL 1x sample buffer. For SDS-PAGE 10uL of the eluate was loaded on gel. 20, 40, and 60 μg total protein extract from Arabidopsis thaliana cell suspension culture (Landsberg erecta), or AtTOR protein enriched by immunoprecipitation using AtRAPTOR1B was separated on 4-15 % gradient TGX (Biorad) SDS-PAGE and blotted 15 min. to PVDF using the Trans-Blot Turbo system (setting high MW). As negative control, an unrelated immunoprecipitated sample was loaded. Blots were blocked overnight with 1% PVP40 in TBS-T at 4°C with agitation. Blot was incubated with the primary anti-TOR antibody at a dilution of 1: 1 000 in blocking buffer for 4h at room temperature (RT) with agitation. The antibody solution was decanted and the blot was rinsed briefly once, then washed once for 15 min and 3 times for 5 min in TBS-T at RT with agitation. Blot was incubated in secondary antibody (anti-rabbit IgG horse radish peroxidase conjugated, from Agrisera AS09 602) diluted to 1: 20 000 in blocking buffer for 1h at RT with agitation. The blot was washed as above and developed for 1 min with ECL according to the manufacturer's instructions. Exposure time was 10 seconds.
TOR protein (red arrow) detected after enrichment by immunoprecipitation with IgG beads and Raptor-ProtG fusion, while TOR band is absent in control IP with unrelated ProtG-tagged bait.
TOR is a subjected to post-translational modifications (ubiquitination and phosphorylation), which can change the migration pattern in SDS gel.