DHAR2 | Dehydroascorbate Reductase 2

KLH-conjugated synthetic peptide derived from known DHAR1 sequence of Arabidopsis thaliana Q9FRL8, At1g75270

application example

1cm2 of a leaf from Arabidopsis thaliana Col-0 (1) and or t-DNA insertion lines dhar1-1 (2), dhar1-2 (3), dhar1-3 (4), dhar2-1 (5), dhar2-2 (6), dhar1-3 EOS-DHAR1 (7), was extracted using 200µl Lyse&Load-Buffer (Grefen et al. 2009). 10 µl were separated on a 15% SDS-PAGE and blotted 1h to PVDF (using Bjerrum Buffer in a semidry blot). Blots were blocked with 5% Milk in 1xTBS-Tween20 (1%) for 1h at room temperature (RT) with agitation. Blot was incubated in the primary antibody at a dilution of 1:5000 (in 5% Milk 1xTBS-Tween20 (1%) + 0.01 % NaN3) ON at 4°C with agitation. The antibody solution was decanted and the blot was washed 3 times for 10 minutes with 1x TBS-Tween20 at RT with agitation. Blot was incubated in secondary antibody BioRad anti-rabbit IgG AP-conjugate (#170-6518) diluted to 1:2000 in 5% Milk 1xTBS-Tween20 (1%) + 0.01 % NaN3 for 1h at RT with agitation. The blot was washed as above, equilibrated in staining buffer (100mM Tris-HCl, 100mM NaCl, 5mM MgCl2, see Grefen et al. 2009) and developed for 5-15 min. with staining solution (Nitro blue tetrazolium chloride (NBT) and 5-bromo-4-chloro-3-indoylphosphate-p-toluidin (BCIP) in staining buffer).

Courtesy Dr. Chrisopher Grefen, UK

DHAR2 ( Dehydroascorbate Reductase 2) the protein is induced by jasmonic acid and oxidative chemical stresses and is a key component of the ascorbate recycling system. Involved in redox homeostasis under biotic and abiotic inducers. Localized in cytoplasm. Synonymes: chloride intracellular channel homolog 2, CLIC homolog 2, glutathione-dependent dehydroascorbate reductase 2, DHAR2, CytDHAR, GSH-dependent dehydroascorbate reductase 2.