HSP21 | Chloroplastic heat shock protein

AS08 285 |Clonality: Polyclonal | Host: Rabbit | Reactivity: A. stolonifera cv. ‘Penncross’, A.thaliana, N. tabacum

Product Information

Immunogen

Recombinant Hsp21 protein derived from the sequence of Arabidopsis thaliana hsp21 UniProt: P31170, TAIR:At4g27670

Host Rabbit

Clonality Polyclonal

Purity Serum

Format Lyophilized

Quantity 50 µl

Reconstitution For reconstitution add 50 µl of sterile water.

Storage 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 Western blot (WB)

Recommended dilution 1 : 3000 (WB)

Expected | apparent MW

25 | 21 kDa

Reactivity

Confirmed reactivity Agostis stolonifera cv. ‘Penncross’, Arabidopsis thaliana, Nicotiana tabacum

Not reactive in

Chlamydomonas reinhardtii

Application examples

Additional information

Recommended load per well 20 µg of total protein

This product can be sold containing proClin if requested.

Please, note that there might be no HSPs accumulation below temperature of 32-34°C. HSPs are induced when the plant experience temperatures higher than the growing temperature with around 10°C. So, the HSPs induction temperatures for plants grown at 18C differ from these for plants grown at 24C.

Another very effective parameter is the humidity. When using low humidity the plant has a chance to cool down through transpiration. In this case the HSPs induction requires higher temperatures.

Related products

AS08 284 | Anti-HSP17.6 | cytosolic class I heat shock protein 17.6 chicken antibodies

AS07 254 | Anti-HSP17.6 | cytosolic class I heat shock protein 17.6 rabbit antibodies

AS07 255 | Anti-HSP17.7 | cytosolic class II heat shock protein 17.7, rabbit antibodies

collection of antibodies to plant heat shock proteins

Background

HSP21 is a chloroplast-localized small heat shock protein. The way small hsp proteins are protecting a living cell are not fully understood. They seem to be involved in chaperone functions by protecting other proteins from irreversible denaturation.

Product citations

Selected references Jespersen et al. (2017). Metabolic Effects of Acibenzolar-S-Methyl for Improving Heat or Drought Stress in Creeping Bentgrass. Front Plant Sci. 2017 Jul 11;8:1224. doi: 10.3389/fpls.2017.01224. eCollection 2017. (western blot, Agostis stolonifera cv. ‘Penncross’)
Lämke et al. (2016). A hit-and-run heat shock factor governs sustained histone methylation and transcriptional stress memory. EMBO J. 2016 Jan 18;35(2):162-75. doi: 10.15252/embj.201592593. Epub 2015 Dec 9.
McLoughlin et al. (2016) Class I and II Small Heat Shock Proteins Together with HSP101 Protect Protein Translation Factors during Heat Stress. Plant Physiol. 2016 Oct;172(2):1221-1236.
Shen et al. (2016). The Arabidopsis polyamine transporter LHR1/PUT3 modulates heat responsive gene expression by enhancing mRNA stability. Plant J. 2016 Aug 19. doi: 10.1111/tpj.13310. [Epub ahead of print]
Almoguera et al. (2015). Heat shock transcription factors involved in seed desiccation tolerance and longevity retard vegetative senescence in transgenic tobacco. Planta. 2015 May 29.
Hai-Dong Yu et al. (2012). Downregulation of Chloroplast RPS1 Negatively Modulates Nuclear Heat-Responsive Expression of HsfA2 and Its Target Genes in Arabidopsis. Plos Genetics.