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31.
32.
In yeast cell, glucose induces various changes of cellular metabolism on genetic and metabolic levels. One of such changes is autophagic degradation of dispensable peroxisomes (pexophagy) which occurs in vacuoles. We have found that in Saccharomyces cerevisiae, defect of G-protein-coupled receptor Gpr1 and G-protein Gpa2, both the components of cAMP-signaling pathway, strongly suppressed glucose-induced degradation of matrix peroxisomal protein thiolase. We conclude that proteins Gpr1 and Gpa2 are involved in glucose sensing and signal transduction during pexophagy process in yeast. 相似文献
33.
Yuriy V. Pynyaha Yuriy R. Boretsky Daria V. Fedorovych Lubov R. Fayura Andriy I. Levkiv Vira M. Ubiyvovk Olha V. Protchenko Caroline C. Philpott Andriy A. Sibirny 《Biometals》2009,22(6):1051-1061
Pichia guilliermondii is a representative of yeast species that overproduce riboflavin (vitamin B2) in response to iron deprivation. P. guilliermondii
YFH1 gene coding for frataxin homologue, eukaryotic mitochondrial protein involved in iron trafficking and storage, was identified
and deleted. Constructed P. guilliermondii Δyfh1 mutant grew very poorly in a sucrose-containing synthetic medium supplemented with sulfate or sulfite as a sole sulfur source.
Addition of sodium sulfide, glutathione, cysteine, methionine, N-acetyl-l-cysteine partially restored growth rate of the mutant suggesting that it is impaired in sulfate assimilation. Cellular iron
content in Δyfh1 mutant was ~3–3.5 times higher as compared to the parental strain. It produced 50–70 times more riboflavin in iron sufficient
synthetic media relative to the parental wild-type strain. Biomass yield of the mutant in the synthetic glutathione containing
medium supplemented with glycerol as a sole carbon source was 1.4- and 2.6-fold increased as compared to sucrose and succinate
containing media, respectively. Oxygen uptake of the Δyfh1 mutant on sucrose, glycerol or succinate, when compared to the parental strain, was decreased 5.5-, 1.7- and 1.5-fold, respectively.
Substitution of sucrose or glycerol in the synthetic iron sufficient medium with succinate completely abolished riboflavin
overproduction by the mutants. Deletion of the YFH1 gene caused hypersensitivity to hydrogen peroxide and exogenously added riboflavin and led to alterations in superoxide dismutase
activities. Thus, deletion of the gene coding for yeast frataxin homologue has pleiotropic effect on metabolism in P. guilliermondii. 相似文献
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Geert Zegels Geert AA Van Raemdonck Edmond P Coen Wiebren AA Tjalma Xaveer WM Van Ostade 《Proteome science》2009,7(1):17-16
Background
Cervical-vaginal fluid (CVF) plays an important role in the prevention of gynecological infections, although little is known about the contribution of CVF proteins to the immunity of the lower female genital tract. In order to analyze the protein composition of human CVF, we used CVF samples that are routinely collected during colposcopy, but are usually discarded. Since these samples are available in large quantities we aimed to analyze their usefulness for proteomics experiments. The samples were analyzed using different prefractionation techniques (ultrafiltration and C4(RP)-LC protein separation) followed by C18(RP)-LC peptide separation and identification by MALDI-TOF-TOF mass spectrometry. To determine the reproducibility of this proteomics platform we analyzed three technical replicates. Using spectral counting, protein abundances were estimated in a semiquantitative way. We also compared the results obtained in this study with those from previous studies derived from patients with different physiological conditions in order to determine an overlapping protein set. 相似文献36.
Millerioux Y Clastre M Simkin AJ Marais E Sibirny AA Noël T Crèche J Giglioli-Guivarc'h N Papon N 《Journal of microbiological methods》2011,84(2):355-358
We designed an efficient transformation system for Candida guilliermondii based on a ura5 ATCC 6260 derived recipient strain and a URA5 recyclable selection marker. This “URA5 blaster” disruption system represents a powerful tool to study the function of a large pallet of genes in this yeast of clinical and biotechnological interest. 相似文献
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AA Smith 《Biotechnic & histochemistry》2014,89(3):215-219
One can find the optimal antibody dilution for immunostaining by repeated staining on the same tissue section by using a less dilute antibody for each attempt. Using secondary antibody and horseradish peroxidase conjugated to a dextran polymer, a section stained repeatedly with several dilutions of antibody appears as good as a section stained with only the last dilution. 相似文献
39.
Estimating medical costs with censored data 总被引:6,自引:0,他引:6
40.
DNA damage‐induced replication stress results in PA200‐proteasome‐mediated degradation of acetylated histones
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