PsbQ | 16 kDa protein of the oxygen evolving complex (OEC) of PSII
AS06 142-16 | Clonality: Polyclonal | Host: Rabbit | Reactivity: A. thaliana, H. vulgare, P. abies, T. aestivum, Z. mays
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23.8 | 16 kDa
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5 µg of total protein from Arabidopsis thaliana (1), Hordeum vulgare (2), Zea mays (3) extracted with Agrisera PEB buffer (AS08 300) were separated on 4-12 % NuPAGE Bis-Tris gel (Invitrogen) and blotted 1h to PVDF. Blots were blocked with blocking reagent for 1.5 h at room temperature (RT) with agitation. Blot was incubated in the primary antibody at a dilution of 1: 10 000 for 1h at RT 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 RT with agitation. Blot was incubated in secondary antibody (anti-rabbit IgG horse radish peroxidase conjugated, Agrisera, AS09 602) diluted to 1:25 000 in for 1h at RT with agitation. The blot was washed as above and developed for 5 min with chemiluminescent detection reagent, according to the manufacturers instructions. Exposure time was 44 seconds.
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PSII reaction centre components are generating the redox potential required to drive highly oxidizing water splitting reaction. Four Mn atoms are present on a lumenal surface and form the catalyctic site of the water-splitting reaction which is in close association with the 33 kDa (PsbO), 23 kDa (PsbP) and 17 kDa (PsbQ) extrinistic subunits of oxygen evolving complex OEC. A 33-kDa extrinsic protein is also termed the Mn-stabilizing protein (MSP), however recent evidences shown that it is C-terminal domain of PsbA (D1) protein which is involved in in the assembly and stabilization of the OEC. Synonymes: PSBQ, PSBQA
Pavlovič et al. (2016). Light-induced gradual activation of photosystem II in dark-grown Norway spruce seedlings. Biochim Biophys Acta. 2016 Feb 18. pii: S0005-2728(16)30028-7. doi: 10.1016/j.bbabio.2016.02.009.
Albanese et al. (2016). Isolation of novel PSII-LHCII megacomplexes from pea plants characterized by a combination of proteomics and electron microscopy. Photosynth Res. 2016 Jan 9.
Grassl et al. (2012). Early events in plastid protein degradation in stay-green Arabidopsis reveal differential regulation beyond the retention of LHCII and chlorophyll. J. Proteome Res. October 2.
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