Name: identification of protein complexes with quantitative proteomics in s. cerevisiae
Uploaded: 2009-03-04T00:00:00
Description: Watch this Scientific Journal Video about Identification of protein complexes with quantitative proteomics in S. cerevisiae at JoVE.com

सामग्री और तरीके <ol><li> खमीर उपभेदों <ul><li> सभी उपभेदों BY4742 पृष्ठभूमि पर आधारित इस अध्ययन में इस्तेमाल कर रहे हैं. SILAC नियंत्रण तनाव (Mat एक, his3, leu2, ura3, lys2 और arg4: G418): BY4742 (चटाई अल्फा, arg4 विलोपन तनाव (G418: एक his3, ura3, leu2, और arg4 ?...

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	<li>Loewen, C. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Inheritance+of+cortical+ER+in+yeast+is+required+for+normal+septin+organization.">Inheritance of cortical ER in yeast is required for normal septin organization.</a> Jour. Cell Biol. 179, 467-483 .</li><li>Ong, S., Foster, L. J., Hoog, C. L., Mann, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Mass+spectrometric-based+approaches+in+quantitative+proteomics.">Mass spectrometric-based approaches in quantitative proteomics.</a> Methods. 29, 124-130 .</li><li>Puig, O. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+Tandem+Affinity+Purification+(TAP)+method:+a+general+procedure+of+protein+complex+purification.">The Tandem Affinity Purification (TAP) method: a general procedure of protein complex purification.</a> Methods. 24, 218-229 .</li><li>Amberg, D. C., Burke, D. J., Strathern, J. N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Methods+in+Yeast+Genetics.">Methods in Yeast Genetics.</a> , 123-125 .</li></ol>

शुद्धि की प्रक्रिया के दौरान बचाया aliquots (1) पूर्व मंजूरी दे दी सेल lysate, (2) बाध्य अंश, (3) अनबाउंड अंश, और (4) eluted अंश शामिल करना चाहिए. हम पश्चिमी द्वारा ऊपर aliquots के प्रोटीन सामग्री का विश्लेषण विरोधी नल एंटीबॉडी या ?...

identification of protein complexes with quantitative proteomics in s. cerevisiae

Lipids are the building blocks of cellular membranes that function as barriers and in compartmentalization of cellular processes, and recently, as important intracellular signalling molecules. However, unlike proteins, lipids are small hydrophobic molecules that traffic primarily by poorly described nonvesicular routes, which are hypothesized to occur at membrane contact sites (MCSs). MCSs are regions where the endoplasmic reticulum (ER) makes direct physical contact with a partnering organelle, e.g., plasma membrane (PM). The ER portion of ER-PM MCSs is enriched in lipid-synthesizing enzymes, suggesting that lipid synthesis is directed to these sites and implying that MCSs are important for lipid traffic. Yeast is an ideal model to study ER-PM MCSs because of their abundance, with over 1000 contacts per cell, and their conserved nature in all eukaryotes. Uncovering the proteins that constitute MCSs is critical to understanding how lipids traffic is accomplished in cells, and how they act as signaling molecules. We have found that an ER called Scs2p localize to ER-PM MCSs and is important for their formation. We are focused on uncovering the molecular partners of Scs2p. Identification of protein complexes traditionally relies on first resolving purified protein samples by gel electrophoresis, followed by in-gel digestion of protein bands and analysis of peptides by mass spectrometry. This often limits the study to a small subset of proteins. Also, protein complexes are exposed to denaturing or non-physiological conditions during the procedure. To circumvent these problems, we have implemented a large-scale quantitative proteomics technique to extract unbiased and quantified data. We use stable isotope labeling with amino acids in cell culture (SILAC) to incorporate staple isotope nuclei in proteins in an untagged control strain. Equal volumes of tagged culture and untagged, SILAC-labeled culture are mixed together and lysed by grinding in liquid nitrogen. We then carry out an affinity purification procedure to pull down protein complexes. Finally, we precipitate the protein sample, which is ready for analysis by high-performance liquid chromatography/ tandem mass spectrometry. Most importantly, proteins in the control strain are labeled by the heavy isotope and will produce a mass/ charge shift that can be quantified against the unlabeled proteins in the bait strain. Therefore, contaminants, or unspecific binding can be easily eliminated. By using this approach, we have identified several novel proteins that localize to ER-PM MCSs. Here we present a detailed description of our approach. 

Watch this Scientific Journal Video about Identification of protein complexes with quantitative proteomics in S. cerevisiae at JoVE.com

Identification of protein complexes with quantitative proteomics in S. cerevisiae

यहाँ हम एक नया Saccharomyces cerevisiae में प्रोटीन परिसरों की पहचान करने के लिए मात्रात्मक प्रोटिओमिक्स तकनीक का वर्णन. इस अध्ययन में, हम SILAC विधि का इस्तेमाल किया है एक साथ आत्मीयता अग्रानुक्रम मास स्पेक्ट्रोमेट्री द्वारा पीछा करने के लिए उच्च विशिष्टता के साथ एक ईआर प्रोटीन, Scs2p के बंधन भागीदारों की पहचान शुद्धि के साथ.

मात्रात्मक प्रोटिओमिक्स के साथ एस cerevisiae में प्रोटीन परिसरों की पहचान

Lipids are the building blocks of cellular membranes that function as barriers and in compartmentalization of cellular processes, and recently, as ...

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Biology

Assay for Adhesion and Agar Invasion in S. cerevisiae

आसंजन और एस cerevisiae में अग्रवाल आक्रमण के लिए परख

Yeasts are found in natural biofilms, where many microorganisms colonize surfaces. In artificial environments, such as surfaces of man-made objects, ...

Proteomics to Identify Proteins Interacting with P2X2 Ligand-Gated Cation Channels

प्रोटिओमिक्स P2X2 ligand-gated कटियन चैनल के साथ बातचीत प्रोटीन की पहचान

Ligand-gated ion channels underlie synaptic communication in the nervous system1. In mammals there are three families of ligand-gated channels: the cys ...

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एक उच्च throughput के लिए विश्व स्तर पर एस cerevisiae में organelle आकारिकी अध्ययन विधि

High-throughput methods to examine protein localization or organelle morphology is an effective tool for studying protein interactions and can help ...

Quantitative Phosphoproteomics in Fatty Acid Stimulated Saccharomyces cerevisiae

Quantitative Phosphoproteomics in Fatty Acid Stimulated Saccharomyces cerevisiae

फैटी एसिड में मात्रात्मक Phosphoproteomics प्रेरित Saccharomyces cerevisiae</em

This protocol describes the growth and stimulation, with the fatty acid oleate, of isotopically heavy and light S. cerevisiae cells. Cells are ground ...

Studying Age-dependent Genomic Instability using the S. cerevisiae Chronological Lifespan Model

Studying Age-dependent Genomic Instability using the S. cerevisiae Chronological Lifespan Model

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Studies using the Saccharomyces cerevisiae aging model have uncovered life span regulatory pathways that are partially conserved in higher eukaryotes1-2. ...

Identification of Protein Complexes in Escherichia coli using Sequential Peptide Affinity Purification in Combination with Tandem Mass Spectrometry

Identification of Protein Complexes in Escherichia coli using Sequential Peptide Affinity Purification in Combination with Tandem Mass Spectrometry

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Since most cellular processes are mediated by macromolecular assemblies, the systematic identification of protein-protein interactions (PPI) and the ...

Flow Cytometry-based Purification of S. cerevisiae Zygotes

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फ्लो आधारित शोधन<em&gt; एस cerevisiae</em&gt; Zygotes

Zygotes are essential intermediates between haploid and diploid states in the life cycle of many organisms, including yeast (Figure 1) 1. S. cerevisiae ...

Visualization and Analysis of mRNA Molecules Using Fluorescence In Situ Hybridization in Saccharomyces cerevisiae

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प्रतिदीप्ति का प्रयोग mRNA अणुओं के दृश्य और विश्लेषण<em&gt; स्वस्थानी</emमें&gt; संकरण<em&gt; Saccharomyces cerevisiae</em

The Fluorescence in situ Hybridization (FISH) method allows one to detect nucleic acids in the native cellular environment. Here we provide a protocol for ...

Coupled Assays for Monitoring Protein Refolding in Saccharomyces cerevisiae

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में निगरानी प्रोटीन refolding के लिए युग्मित Assays<em&gt; Saccharomyces cerevisiae</em

Proteostasis, defined as the combined processes of protein folding/biogenesis, refolding/repair, and degradation, is a delicate cellular balance that must ...

Identification of Post-translational Modifications of Plant Protein Complexes

संयंत्र प्रोटीन परिसरों के बाद translational संशोधनों की पहचान

Plants adapt quickly to changing environments due to elaborate perception and signaling systems. During pathogen attack, plants rapidly respond to ...