ACO1 | Aconitase
AS09 521 | Clonality:Polyclonal | Host:Rabbit | Reactivity: Arabidopsis thaliana, Solanum lycopersicum

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Product Information
Arabidopsis ACO1 (AT4G35830, Q42560), codon 120 – 898 (C-terminus), was cloned in fusion with a N-terminal 6xHis tag, and over-expressed in E. coli. All recombinant protein accumulated in inclusion bodies, which were purified by centrifugation and solubilised in 6 M guanidine-HCl. The protein was refolded by dilution in 100 mM Tris-HCl 8.5, 10% (v/v) glycerol, 2 mM dithiothreitol, and concentrated prior to immunisation.
Reactivity
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Chlamydomonas reinhardii, cyanobacteria
Application examples
application example Western blot analysis of 1) 5 ng purified 6xHis-AtACO1 (Δ119, 87 kDa); 2) 2 ng 6xHis-AtACO1; 3) Total protein (15 μg) from Arabidopsis thaliana leaves were extracted with 2 volumes 50 mM Tris-HCl pH 8.0, 5% (v/v) glycerol, 1% (w/v) sodium dodecyl sulphate, 10 mM NaEDTA, 1 mM phenylmethanesulfonyl fluoride; 4) 15 µg of purified mitochondria from Arabidopsis thaliana cell culture, 5) 15 µg of protein from Arabidopsis thaliana chloroplasts Proteins were separated by SDS-PAGE and blotted onto nitrocellulose (Whatman Protran BA 83, 0.2 μm). Blots were blocked in Tris-buffered saline (TBS) with 0.1% (v/v) Tween 20 and 5% (w/v) dried skimmed milk for 1 h at room temperature, and incubated with anti-AtACO1 antibodies diluted 1:10,000 in fresh block solution (10 mL per 8 x 6 cm blot) for 2 h at room temperature. The blot was washed 3 times with block solution, then incubated with horse-radish peroxidase conjugated anti-rabbit IgG antibodies, diluted 1: 5,000 in block solution, for 45 minutes. The blot was washed 2 times with block solution and 2 times with TBS-Tween. The signal was developed with standard ECL reagents and Kodak X-Omat LS film. Note: as visible in lane 2, detection of recombinant AtACO1 falls below 2 ng of recombinant protein. |
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Additional information
Background
Aconitase is a single subunit enzyme of the tricarboxylic acid cycle (or Krebs cycle) in the mitochondria. A cytosolic isoform is also part of the glyoxylate cycle. Aconitase catalyzes the dehydration / hydration of citrate to iso-citrate, via cis-aconitate as an intermediate. The reaction is facilitated by an iron-sulphur cluster in the active site of the enzyme. The iron-sulphur cluster is somewhat unstable, especially under oxidative stress, and loss of the cofactor leads to degradation of the protein.Alternative names: ACO, citrate hydro-lyase 1,2,3
Product citations
Przybyla-Toscano et al. (2021) Protein lipoylation in mitochondria requires Fe-S cluster assembly factors NFU4 and NFU5. Plant Physiol. 2021 Oct 28:kiab501. doi: 10.1093/plphys/kiab501. Epub ahead of print. PMID: 34718778.
Rurek et al. (2018). Mitochondrial Biogenesis in Diverse Cauliflower Cultivars under Mild and Severe Drought Involves Impaired Coordination of Transcriptomic and Proteomic Response and Regulation of Various Multifunctional Proteins. Preprints 2018, 2018010276 (doi: 10.20944/preprints201801.0276.v1).
Setién et al. (2014). Root phosphoenolpyruvate carboxylase and NAD-malic enzymes activity increase the ammonium-assimilating capacity in tomato. J Plant Physiol. 171:49-63.
Birke et al. (2012). Cysteine biosynthesis, in concert with a novel mechanism, contributes to sulfide detoxification in mitochondria of Arabidopsis thaliana. Biochem J. May 2, ahead of print.
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