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product information
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| background |
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PsaC is a conserved, chloroplast-encoded, Fe-S binding protein of approximately 10 kDa, present in all known Photosystem I complexes. It is located on the stromal side of the thylacoid membranes. PsaC coordinates the Fe–S clusters FA and FB through two cysteine-rich domains. |
| immunogen |
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KLH-conjugated synthetic peptide conserved in all known PsaC proteins including Arabidopsis thaliana AtCg01060, Hordeum vulgare P69416, Oryza sativa P0C360, Chlamydomonas reinhardtii Q00914, Synechococcus elongatus Q31QV2 |
| antibody format |
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rabbit |
polyclonal |
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serum |
lyophilized |
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| quantity |
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200 µl (antibody) 100 µl (protein standard) |
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| storage |
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store lyophilized/reconstituted at -20°C; once reconstituted make aliquots to avoid repeated freeze-thaw cycles. Please, remember to spin tubes briefly prior to opening them to avoid any losses that might occur from lyophilized material adhering to the cap or sides of the tubes. |
| tested applications |
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western blot (WB) |
| related products |
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AS04 042S | PsaC protein standard for quantitation collection of antibodies to PSI proteins |
| additional information |
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Peptide target used to elicit this antibody is well conserved in all photoautotrophs except some cyanobacteria, some red algae and Cyanophora paradoxa, which contain a conserved substitution of a valine to an isoleucine. The performance of the antibodies has been confirmed against taxa containing both the valine and isoleucine variants. For reconstitution of PsaC antibodies (AS10 939) add 100 µl of sterile water. For reconstitution of PsaC positive control add 90 µl of sterile water. |
application information
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| recommended dilution |
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1: 1000 with ECL (WB) |
| expected | apparent MW |
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9 kDa |
| confirmed reactivity |
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Arabidopsis thaliana, Horderum vulgare, Spinacia oleracea, Synechococcus PCC 7942, Cyanophora paradoxa, Heterosigma akashiwo, Thalassiosira pseudonan, Euglena gracilis, Micromonas pusilla, Chlamydomonas reinhardtii, Porphyra sp., Gonyaulax polyedra, Emiliania huxleyi |
| predicted reactivity |
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dicots including Glycine max, Nicotiana tabacum, Spinacia oleracea, and monocots, Physcomitrella patens, algae and cyanobacteria, Prochlorococcus sp. (surface and a deep water ecotype) |
| not reactive in |
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no confirmed exceptions from predicted reactivity known in the moment |
| additional information |
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In some species minor cross reactions with some larger proteins are seen. These may contain related iron-sulfur binding motifs. Therefore size verification of the reacting band is required. Due to the small size of the protein, care should be taken to differentiate between chemiluminescent signal from PsaC and non-specific signals from chlotophylls or lipids if pigment is retained near the bottom of the blot. Protein standard: use a load of 2 µl per well with ECL detection system and 4 µl per well with alkaline phospatase. |
| selected references |
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Ifuku et al. (2005). PsbP protein, but not PsbQ protein, is essential for the regulation and stabilization of photosystem II in higher plants. Plant Physiol. 3:1175-1184. Oesterhelt et al (2007). Regulation of photosynthesis in the unicellular acidophilic red alga Galdieria sulphuraria. Plant J.3:500511. |
application example
2 µg of total protein from (1) Horderum vulgare leaf extracted with PEB (AS08 300), (2) Chlamydomonas reinhardtii total cell extracted with PEB (AS08 300), (3) Synechococcus sp. 7942 total cell extracted with PEB (AS08 300) were separated on 4-12% NuPage (Invitrogen) LDS-PAGE and blotted 1h to PVDF. Blots were blocked immediately following transfer in 2% ECL Advance blocking reagent (GE Healthcare) in 20 mM Tris, 137 mM sodium chloride pH 7.6 with 0.1% (v/v) Tween-20 (TBS-T) for 1h at room temperature with agitation. Blots were incubated in the primary antibody at a dilution of 1: 50 000 for 1h at room temperature with agitation. The antibody solution was decanted and the blot was rinsed briefly twice, then washed once for 15 min and 3 times for 5 min in TBS-T at room temperature with agitation. Blots were incubated in secondary antibody (anti-rabbit IgG horse radish peroxidase conjugated, from Abcam) diluted to 1:10 000 in 2% ECL Advance blocking solution for 1h at room temperature with agitation. The blots were washed as above and developed for 5 min with ECL Advance detection reagent according the manufacturers instructions. Images of the blots were obtained using a CCD imager (FluorSMax, Bio-Rad) and Quantity One software (Bio-Rad).
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