AS07 268 | Clonality: Polyclonal | Host: Rabbit | Reactivity: Higher plants
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core fucose residues bound to the N-glycan in alpha 1,3
10 - 100 for various glycoproteins
For each sample, 1µg of purified protein was denatured with leammli sample buffer at 100°C for 10 minutes loaded on a Bis-Tris gel 4-12% and blotted 1h15 to nitrocellulose membrane using semi-dry transfer. Blots were saturated in TBST over night with agitation. Blot was incubated for 2 hours with primary antibody at a dilution of 1:5000 in TBST at RT with agitation. The antibody solution was discarded and after quick whashes with TBST, the blot was washed 3X15 min in TBST. Blot was incubated in secondary antibody (Goat anti Rabbit IgG, HRP conjugated AS09 602 lot 1707 from AGRISERA) diluted to 1:50 000 in TBST for 1 hour at RT with agitation. The blot was washed as above, plus 1 wash in TBS for 10 min at RT with agitation. The blot was developed for 5 min with chemiluminescent detection reagent. Exposure time was 5 seconds.
RiboB: RiboNuclease B contains only oligomannosidic N-Glycans. Used here as a negative control. PLA2: Phospholipase A2 from honey bee venom (Apis mellifera) contains α1,3 Fucose residues. aFet: Asialofetuin is a glycoprotein with α1,6 fucose. Used here as a negative control. Av: recombinant Avidin expressed in corn contains α1,3 Fucose residues.
Courtesy Dr. Muriel Bardor, University of Rouen, France
Total cell extract from Arabidopsis thaliana wild type (1) and cell extracts from different mutants defective in fucosyltransferases (2-5) (data not published yet).
Primary antibody has been used at 10 µg/10 ml of incubation buffer. Detection has been done using enchanced chemiluminescence (ECL).
Dot blot reaction of anti-Fucose and anti-Xylose antibodies with various controls: Avidin (Fuc+/Xyl+), Fetuin (Fuc-/Xyl-), PLA2 (Fuc+/Xyl-) and Mur1-2 (Fuc-/Xyl+). 2 µl of each extract were spotted on a nitrocellulose membrane, placed on top of 2 WHATMAN filters (one soaked in TBS-T) and dried for 1.5 h at RT. The mem-brane was blocked for 30 min with 2% low-fat milk powder in TBS-T (0.1% TWEEN 20) and incubated with anti-Fucose(1) (AS07 268, 1:1000) or anti-Xylose(2) (AS07 267, 1:1000) for 30 min and then with secondary anti-rabbit(1:1000) antibody (ALP conjugated, recommended secondary antibody AS09 607). Membrane was washed with TBS-T 3 x 10 minutes before reaction development using alkaline phosphatase reagent BCIP®/NTB premixed solution (Sigma, Prod. No. B6404).
Please follow this link for a more detailed Dot-Blot protocol
Immunolocalization using anti-fucose antibodies on a 40µm vibratome section of a 21 day old Arabidopsis thaliana hypocotyl (wood). Fixation: 4% formaldehyde fixation in 1X PME (100 mM PIPES, 1 mM MgSO4, 2 mM EGTA); blocking: 5 % BSA; primary antibody dilution: 1:40; secondary antibody: 1:300 AlexaFluor568 from Invitrogen (Life Technologies), Alexa Fluor® 568 Goat Anti-Rabbit IgG (H+L); Left panel, immunolabel channel (cyan) overlaid on grayscale channel (0.001% Calcofluor white which stains cellulose and hemicellulose). Right panel, only immunolabelling
Courtesy of Dr. Hardy Hall and Dr. Urs Fischer, Umeå Plant Science Centre, Sweden
Alpha (1,3) fucose is present not only in plants but also in some invertebrates (such as nematodes, bees, etc.) . However, cross-reaction with glycoproteins from these organisms is weaker than the one observed in plants. This sugar residue does not exist in mammals, in their endogenous glycoproteins.
PLA2 (phospholipase 2 from bee venom) which contains only α1.3 fucose, Sigma, product number P9279.
Type II - horseradish peroxidase which contains β1.2 Xylose and α1.3 fucose, Sigma, product number P8250.
The antibody does not recognize alpha 1,6-fucose.
This antibody specifically cross-reacts against fucose residues bound to the protein N-glycans in alpha 1,3. This residue is characteristic of the plant protein N-glycans and is absent in protein N-glycans from animals. This residue is added in the Golgi apparatus.
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