DRB4 | Double-stranded RNA-binding protein 4

Product no: AS15 3104

AS15 3104  |  Clonality: Polyclonal  |  Host: Rabbit  |  Reactivity: Arabidopsis thaliana

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  • Product Info
  • Immunogen:
    KLH-conjugated peptide derived from Arabidopsis thaliana DRB4 sequence, Uniprot: Q8H1D4, TAIR: At3g62800
    Host: Rabbit
    Clonality: Polyclonal
    Purity: Immunogen affinity purified serum in PBS pH 7.4.
    Format: Lyophilized
    Quantity: 50 l
    Reconstitution: For reconstitution add 50 l of sterile water
    Storage: Store lyophilized/reconstituted at -20C; once reconstituted make aliquots to avoid repeated freeze-thaw cycles. Please remember to spin the tubes briefly prior to opening them to avoid any losses that might occur from material adhering to the cap or sides of the tube.
    Tested applications: Western blot (WB)
    Recommended dilution: 1 : 1000-1 : 5000
    Expected | apparent MW: 38,4 | 40 kDa
  • Reactivity
  • Confirmed reactivity: Arabidopsis thaliana
    Predicted reactivity: Brassica napus,Brassica oleracea, Camelina sativa, Capsella rubella, Eutrema salsugineum
    Species of your interest not listed? Contact us
    Not reactive in: No confirmed exceptions from predicted reactivity are currently known
  • Application Examples
  •  Application example
    Western Blot with anti-DRB4 antibody

    100 µg of total protein from Arabidopsis thaliana wt, drb4, and 35S-DRB4  leaves extracted with isolation buffer (50 mM Tris-HCl, pH 7.5, 10% glycerol, 150 mM NaCl, 10 mM MgCl2, 5 mM EDTA, 5 mM DTT, and 1 X protease inhibitor cocktail (Sigma-Aldrich, St. Louis, MO) and denatured by boiling at 100°C. The proteins were separated on 10% SDS-PAGE and blotted 1.5 hrs to PVDF membrane using wet transfer. Blots were blocked with 5% milk powder  for 30 min at room temperature (RT) with agitation. Blot was incubated in the primary antibody at a dilution of 1: 1,000 for 60 min at RT with agitation. The antibody solution was decanted and the blot was rinsed briefly twice, then washed 3 times for 10 min in phosphate buffer (containing 0.1% Tween 20) at RT with agitation. Blot was incubated in secondary antibody (anti-rabbit IgG alkaline phosphatase conjugated) diluted to 1:10,000 for 120 min at RT with agitation. The blot was washed as above and developed with  NBT/BCIP (Fisher Chemicals) using Alkaline phosphatase detection system. The DRB4 specific band was seen within 20 mins and showed a better signal when allowed to develop for longer duration (overnight in this case).

    Courtesy of Dr. Gah-hyun Lim and Prof. Pradeep Kachroo, University of Kentucky, Lexington, USA

    Western blot using anti-DRB4 antibody -2

    300 µg of total protein from Arabidopsis thaliana Col-0 and drb4 mutant flowers, extracted according to Hurkman and Tanaka (Plant Physiol. 1986 Jul; 81(3):802-6) and denatured with WB loading buffer at 95°C for 5 min, were separated on 15% SDS-PAGE and blotted 90 min to PVDF membrane using wet transfer. Blots were blocked with 5% milk powder in PBS, Tween 20 0.1% for 30 min at room temperature (RT) with agitation. Blot was incubated in the primary antibody at a dilution of 1:5000 overnight at 4°C with agitation. The antibody solution was decanted and the blot was washed 4 times for 10 min in PBS Tween20 0.1% at RT with agitation. Blot was incubated in secondary antibody (goat anti-rabbit IgG horse radish peroxidase conjugated, provided by Agrisera) diluted to 1:25000 in PBS 1x, Tween 20 0.1%, milk powder 5% for 3h30 at RT with agitation. The blot was washed as above, incubated for 3 min with Lumi-LightPLUS Western Blotting Substrate (Roche) and revealed using X-ray films. Exposure time was 5 seconds.

    Courtesy of Dr. Patrice Dunoyer, Institut de Biologie Moléculaire des Plantes du CNRS (IBMP-CNRS), France

  • Background
  • Background:
    Double-stranded RNA-binding protein 4 (DRB4) plays a role in RNA-mediated post-transcriptional gene silencing (PTGS). It assists DCL4 during biogenesis of trans-acting small interferring RNAs (ta-siRNAs) and is necessary for DCL4 activity. DRB4 is also involved in RNA silencing of RNA and DNA viruses.

    Alternative name: dsRNA-binding protein 4, DBR4
  • Protocols


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