Sml1 | Suppressor of Mec1 lethality
AS10 847 | Clonality: Polyclonal | Host: Rabbit | Reactivity:Saccharomyces cerevisiae
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11.83 | 11-12 kDa
10 μl total protein from 9.25 x 107 cells of Saccharomyces cerevisiae extracted with 20% TCA as described below were separated on 20% SDS-PAGE and blotted 1.5h (0.5 A) to a nitrocellulose membrane (Whatman PROTRAN BA 85, 0.45 μm). Blots were blocked with 5% non-fat dry milk in TBST for 1.5h at room temperature (RT) with agitation. Blot was incubated in the primary antibody at a dilution of 1: 5 000 overnight at 4C° with agitation. The antibody solution was decanted and the blot was washed 3 times for 10 min in TBST at RT with agitation. Blot was incubated in secondary antibody (anti-rabbit IgG horse radish peroxidase conjugated from Agrisera, (AS09 602) diluted to 1:50 000 for 1h at RT with agitation. The blot was washed as above and developed for 3 min with chemiluminescent detection reagent. Exposure time was 30 seconds.
Courtesy Dr. Andrei Chabes, Umeå University, Sweden
Cell preparation for western blot: cells were harvested by centrifugation (4000 x g , 6 min, 4 °C). Supernatant was discarded and cells were resuspended in 500 μl cold TCA buffer (20 mM Tris, pH 8, 50 mM ammonium acetate, 2 mM EDTA, 1 tablet/10 ml of Complete Mini Protease inhibitor cocktail with EDTA (Roche Diagnostics GmbH)). 500 μl 0.5 mm Zirconia/Silica Beads (BioSpec Products, Inc. 11079105z) and 500 μl cold 20 % TCA was added. Samples were vigorously vortexed twice for 30 sec (kept on ice in between). 750 μl from the liquid phase was transferred into a fresh Eppendorf tube. Samples were centrifuged for 10 min (20000 x g, 4 °C). The pellet was resuspended in 300 μl TCA-Laemmli buffer and boiled for 10 min at 100 °C.
Sml1 is a ribonucleotide reductase inhibitor involved in regulation of dNTP production. It is regulated by Mec1p and Rad53p during DNA damage and S phase. Synonymes: Yml058w.
Corcoles-Saez et al. (2019). Essential Function of Mec1, the Budding Yeast ATM/ATR Checkpoint-Response Kinase, in Protein Homeostasis. Dev Cell. 2018 Aug 20;46(4):495-503.e2. doi: 10.1016/j.devcel.2018.07.011.
Garbacz et al. (2019). The absence of the catalytic domains of Saccharomyces cerevisiae DNA polymerase ϵ strongly reduces DNA replication fidelity. Nucleic Acids Res. 2019 Jan 30. doi: 10.1093/nar/gkz048.
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Dmowski et al. (2017). Mutations in the Non-Catalytic Subunit Dpb2 of DNA Polymerase Epsilon Affect the Nrm1 Branch of the DNA Replication Checkpoint. PLoS Genet. 2017 Jan 20;13(1):e1006572. doi: 10.1371/journal.pgen.1006572.
Mertz et al. (2015). Colon cancer-associated mutator DNA polymerase δ variant causes expansion of dNTP pools increasing its own infidelity. Proc Natl Acad Sci U S A. 2015 May 12;112(19):E2467-76. doi: 10.1073/pnas.1422934112. Epub 2015 Mar 31.
Singh et al. (2014). Anti-cancer drug KP1019 modulates epigenetics and induces DNA damage response in Saccharomyces cerevisiae. FEBS Lett. 2014 Feb 20. pii: S0014-5793(14)00137-9. doi: 10.1016/j.febslet.2014.02.017.
Azad et al. (2013). Depletion of Cellular Iron by Curcumin Leads to Alteration in Histone Acetylation and Degradation of Sml1p in Saccharomyces cerevisiae. PLoS One, March 8.
Poli et al. (2012).dNTP pools determine fork progression and origin usage under replication stress. The EMBO J. January 2012, 1-12.
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