ACT | Actin (recombinant monoclonal, clone 14H4G8)

10 µg/well of total protein extracted freshly from Arabidopsis thaliana leaf tissue. All lanes shown are from different Arabidopsis thaliana leaf samples extracted simultaneously. Fresh leaf tissue was ground up directly in 1x Bolt LDS loading buffer (Thermo) and 200mM DTT and denatured at 80°C for 10 min. Samples were separated on 12% SDS-PAGE gel and transferred to nitrocellulose by wet transfer for 1hr at 100V. Blot was blocked with 5 % milk in TBST for 1h/RT with agitation. Blot was incubated with Agrisera Mouse anti-actin monoclonal (AS21 4615) at a dilution of 1:1000, in 5% milk with agitation at 1h RT. The blot was rinsed 3 times for 5 minutes in TBS-T with agitation. Then the membrane was incubated with secondary anti-mouse HRP (Agrisera AS09 627) at 1:10 000 dilution in milk for 1hr at room temp. The blots were washed as above and reaction was visualized using ECL reagent and following manufacture's recommendations. The actin band was visualized after 15 seconds of film exposure.


Samples:
1 - 10 µl of Arabidopsis thaliana (Col-0) seedling extract
2 - 10 µl of Nicotiana benthamiana seedlings extract
3 - 10 µl of Nicotiana tabacum leaves extract
4 - 10 µl of Eschscholzia californica leaves extract
5 - 10 µl of Salvia plebeian hairy roots extract

Total protein was freshly extracted from 50 mg of tissues from species listed above, using 100 µl of 2x SDS sample buffer (0.125M of Tris pH 6.8, 4% SDS, 20% glycerol, 10% 2-mercaptoethanol and 0.2% of bromphenol blue) and denatured with the buffer at 100°C for 3 min. 10 µl of samples were loaded and separated in the 10% SDS-PAGE and blotted for 1h to nitrocellulose (pore size of 0.45 um), using: wet transfer in the cold. Blot was blocked with 3 % milk (PBS-T) for 1h/RT with agitation. Blot was incubated in the primary antibody at a dilution of 1: 10 000/ON with agitation in 3% milk (PBS-T) at 4°C with agitation. The antibody solution was decanted, then washed for 10 min 2 times in PBS-T at RT with agitation. Blot was incubated in matching secondary antibody (Rabbit anti-mouse IgG (H&L), HRP conjugated AS09 627) diluted to 1: 10 000 for 1h/RT with agitation. The blot was washed as above and developed with a chemiluminescent detection reagent. Exposure time was 2 minutes.

Courtesy of Prof. Dr. Sang Un Park's group at Chungnam National University, South Korea




Immunofluorescent localization of actin on suspension culture of Oryza sativa ssp. japonica cv. 'Unggi 9', using anti actin (AS21 4615) and anti-mouse IgG DyLight® conjugated secondary antibodies (AS10 1261). Few representative actin filaments are highlighted by yellow arrowheads. DAPI staining of nuclei is pseudocolored red. 

Material: Suspension cultures of Oryza sativa ssp. japonica cv. 'Unggi 9'
Fixation: Packed cell volume to fixer ratio: 250 µl : 5ml
Fixer composition and buffer: 4% (w/v) paraformaldehyde (freshly prepared as 8% stock and 0.2 µm filtered) in Phosphate Buffered Saline (PBS), pH 7.4 (2x stock, 0.2 µm filtered)
Container and method: in 6 cm Petri dish, gentle shaking at room temperature (RT)
Duration: 40 minutes. Triton X100 is not used in fixer. Cells were not shaken during the first 5 mins of fixation to allowed to partially recover from osmotic shock induced by formaldehyde.
Hydrophilization: no
Cell wall digestion: Yes Packed cell volume to enzyme ratio: 100ul : 2ml Enzyme composition: 1.2% Cellulase (chromatically purified, powder, Worthington), 1.2% (R) Pectinase (protease free, liquid, Sigma) Buffer: 0.5% (w/v) MES buffer, pH 5.6
Container and method: in 2 ml microfuge tube by rolling at room temperature (RT)
Duration:  60 minutes
Membrane permeabilization: Triton-X100 (0.35%), 7 min/RT
Antigen retrieval: no
Blocking buffer: Fish gelatin (5% v/v)
Washing buffer: PBS
Primary antibody dilution and incubation time: 1:500, 1hr/RT
Secondary antibody dilution and incubation time and supplier: DyLight® 488 (AS10 1261) 1:600, 45 min/RT
Co-staining of the nucleus (DAPI): Yes
Nucleus staining: 100 ng/ml DAPI

Courtesy of Dr. Ferhan Ayaydin, Hungarian Centre of Excellence for Molecular Medicine (HCEMM), Szeged, Hungary. 

Sample: Maize protoplasts fixed in 4% paraformaldehyde in 1X PBS pH 7.4 for 1 hour and washed 3 times in 1XPBS buffer

 Primary antibodies: Agrisera AS21 4615 actin monoclonal; clone 14H4G8;

Secondary antibodies: Donkey anti-Mouse IgG (H&L), DyLight® 488 conjugated AS10 1201 (Agrisera)

Other reagents: 30% Bovine Serum Albumin solution, Sigma Aldrich Cat # A8577-50ML; Phosphate Buffered Saline 10X, Electron Microscopy Sciences Cat # 19342-10; Imaging spacer, Millipore Sigma Grace Bio-Labs SecureSeal™ imaging spacer Cat # GBL654008

Protocol:

1. Block isolated protoplasts in a blocking buffer (2% BSA in 1x PBS) for 1 h at room temperature.
2. Dilute the primary antibody to 1: 500 in a blocking buffer, mix well, and spin down at 150 x g for 3 min:
3. Spin down protoplasts in a blocking buffer at 150 g for 1 -3 min and remove as much supernatant as possible using a pipette tip with a cut end (wide opening).
4. Resuspend protoplasts in diluted antibody and incubate for 1 h at room temperature.
5. Spin down protoplasts at 150 g for 1 min and remove as much supernatant as possible using a pipette tip with a cut end.
6. Wash protoplasts in a blocking buffer 3 times for 5 minutes each. Spin and resuspend as described in step 5 between each washing step.
7. Dilute the secondary antibody AS10 1201 to 1: 400, mix well, and spin down at 150 x g for 3 min:
8. Incubate protoplasts in diluted antibody for 1 h at room temperature.
9. Repeat the washing steps as described in 5-6.
10. Resuspend a protoplast pellet in a small volume of PBS 1X, pH 7.4.
11. Prepare microscopy slide: attach imaging spacer on top of the slide, peal off top adhesive membrane, add protoplast suspension on to the slide inside the spacer opening, cover with 22x22 mm cover glass No 1.5.
12. Imaging: Zeiss Elyra 7 SIM

 Courtesy of Courtesy of Dr. Anastasiya Klebanovych, Dr. Kirk Czymmek, Dr. Kevin Cox, Dr. Blake Meyers, at the Donald Danforth Plant Science Center, USA