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en:aree:proteomica:ms:start [2018/02/17 17:10]
Gianluca Frustagli created
en:aree:proteomica:ms:start [2023/06/22 12:43] (current)
Gianluca Frustagli Update of text regarding new instruments.
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-> FIXME **This page is not fully translated, yet.**\\ //(remove this paragraph once the translation is finished)//+**Proteomics Area**
  
-**Area Proteomica** +====== ​Mass Spectrometry ​(MS) ======
-====== ​Spettrometria di Massa (MS) ======+
  
 <WRAP tabs> <WRAP tabs>
-  * [[:​aree:​proteomica:​ms:​richiesta|Richiesta servizio]] +  * [[en:​aree:​proteomica:​ms:​richiesta|Service request]] 
-  * [[:​aree:​proteomica:​ms:​linee_guida|Linee guida]] +  * [[en:​aree:​proteomica:​ms:​linee_guida|Guidelines]] 
-  * [[:​aree:​proteomica:​ms:​protocolli|Protocolli]] +  * [[en:​aree:​proteomica:​ms:​protocolli|Protocols]] 
-  * [[:​aree:​proteomica:​ms:​bibliografia|Bibliografia]] +  * [[en:​aree:​proteomica:​ms:​bibliografia|Bibliography]] 
-  * [[:​aree:​proteomica:​ms:​link_tutorial|Link Tutorial]] +  * [[en:​aree:​proteomica:​ms:​link_tutorial|Links Tutorials]] 
-  * [[:​aree:​proteomica:​ms:​faq|FAQ]]+  * [[en:​aree:​proteomica:​ms:​faq|FAQ]]
 </​WRAP>​ </​WRAP>​
  
-{{:​aree:​proteomica:​ms:​lab.jpeg?​400 |}} L'​unità è dotata di uno spettrometro di massa **LTQ XL Ion Trap** della ThermoFisher con frammentazione ​ETD (Electron ​Transfer Dissociationsupplementare(([[http://​www.pnas.org/​cgi/​content/​full/​101/​26/​9528|Peptide and protein sequence analysis by electron transfer dissociation mass spectrometry]])).+{{:​aree:​proteomica:​ms:​lab.jpeg?​400 |}} Two **Tribrid Orbitrap Fusion** high resolution mass spectrometers are present in the MS Unit.  The Tribrid architecture combines three mass analyzers: a quadrupole, an ion trap and an Orbitrap. Multiple fragmentation techniques are adopted: CID (Collision Induced Dissociation),​ HCD (Higher-energy Collisional Dissociation) and ETD (Electron ​transfer dissociation)(([[http://​www.pnas.org/​cgi/​content/​full/​101/​26/​9528|Peptide and protein sequence analysis by electron transfer dissociation mass spectrometry]])). ​
  
-Questo strumento in-line con un cromatografo ​nano-capillare permette la separazione di miscele peptiche più o meno complesse e la susseguente identificazione delle proteine costituenti attraverso ​software ​dedicati (analisi LC-MS/MS)Questa strumentazione è di grande supporto ​in quei progetti di ricerca biomedica ​in cui si è interessati all'​individuazione e/o caratterizzazione di proteine e del loro livello di espressioneI campioni da analizzare possono essere moltepliciproteine sinteticheproteine ​semi-purificate, immuno-precipitazioni, sub-proteomiproteomi totaliGeneralmentel’analisi ​LC-MS/​MS ​è preceduta da elettroforesi ​(PAGE) ​per una stima qualitativa e quantitativa del campione seguita da digestione  +A FAIMS interface //(field asymmetric-waveform ion-mobility spectrometry)//​ is also available. The spectrometers,​ on line with nano-capillary chromatographs,​ allow the separation of more or less complex peptide mixtures and the subsequent identification of the constituent proteins, through dedicated ​software. ​This instrumentation is of great support ​in those biomedical research projects ​in which one is interested in the identification and/or characterization of proteins and their level of expressionThe samples to analyze can be manysynthetic proteins, semi-purified proteins, immuno-precipitations, sub-proteomestotal proteomesGenerallythe LC-MS/​MS ​analysis is preceded by protein mixture in solution digestion(([[http://​www.nature.com/​nmeth/​journal/​v6/​n5/​abs/​nmeth.1322.html|Universal sample preparation method for proteome analysis]])) or protein separation by electrophoresis ​(PAGE) ​followed by in-gel ​digestion, in order to carry out a qualitative and quantitative estimation of the sample.
-in-gel ​delle proteine+
  
-In caso di campioni molto poveri o per necessità metodologiche,​ la digestione può essere effettuata in soluzione e seguita da cromatografia off-line prima dell’analisi LC-MS/​MS(([[http://​www.nature.com/​nmeth/​journal/​v6/​n5/​abs/​nmeth.1322.html|Universal sample preparation method for proteome analysis]])). Negli studi comparativi è possibile la determinazione quantitativa relativa attraverso tecniche di marcatura isotopica(([[https://​www.ncbi.nlm.nih.gov/​pubmed/​17902639|iTRAQ Reagent-Based Quantitative Proteomic Analysis on a Linear Ion Trap Mass Spectrometer]]))(([[http://​www.neurology.org/​content/​79/​10/​1012.abstract|Increased levels of acute-phase inflammatory proteins in plasma of patients with sporadic CJD]])) ​label-free(([[https://​www.ncbi.nlm.nih.gov/​pubmed/​23794183|Critical assessment of proteome-wide label-free absolute abundance estimation strategies]])). ​L'​unità si avvale ​in particolare di un'​ampia esperienza nei seguenti ambiti:+In comparative studies it is possible to determine the relative quantity using isotope labeling(([[https://​www.ncbi.nlm.nih.gov/​pubmed/​17902639|iTRAQ Reagent-Based Quantitative Proteomic Analysis on a Linear Ion Trap Mass Spectrometer]]))(([[http://​www.neurology.org/​content/​79/​10/​1012.abstract|Increased levels of acute-phase inflammatory proteins in plasma of patients with sporadic CJD]])) ​or label-free(([[https://​www.ncbi.nlm.nih.gov/​pubmed/​23794183|Critical assessment of proteome-wide label-free absolute abundance estimation strategies]])) ​techniquesIn particular, the unit draws on extensive experience ​in the following areas:
  
-  * preparazione e caratterizzazioneanche mediante analisi comparativa quantitativadi sub-proteomi estratti da cellule in colturafluidi e altri tessuti biologici;  +  * preparation and characterizationalso through quantitative comparative analysisof sub-proteomes extracted from cultured cellsfluids and other biological tissues
-  * analisi di microdomini di membrana ​(rafts) ​e vescicole extra-cellulari ​(esosomi e microparticelle);  +  * analysis of membrane microdomains ​(rafts) ​and extracellular vesicles ​(exosomes and microparticles); 
-  * caratterizzazione di proteineanalisi della sequenza proteica mediante combinazione di diversi enzimistudio di modifiche ​post-traduzionalideterminazione dell'N-terminale e dei neo N-termini ​mediante derivatizzazione chimicaformazione di addotti tra proteine e piccole molecole e\o farmaci+  * characterization of proteinsanalysis of the protein sequence by combining different enzymesstudy of post-translational modificationsdetermination of the N-terminus and neo-N-termini ​by chemical derivatizationformation of adducts between proteins and small molecules and/or drugs
-  * interattomica mediante analisi di immunoprecipitati+  * interactomics by analysis of immunoprecipitates
-  * analisi quantitativa di peptidi specifici ​in miscela.+  * quantitative analysis of specific peptides ​in mixture.
  
-Sono disponibili diversi approcci di analisi bioinformatica per l'​analisi dei risultati.+Several bioinformatic analysis approaches are available for the analysis of results.
  
-Per accedere al servizio è necessario compilare il modulo __[[aree:​proteomica:​ms:​richiesta|Richiesta Servizio]]__. Sarete contattati per un incontro preliminare. ​+\\
  
-Si consiglia di attenersi a quanto riportato nella sezione __[[linee_guida|Linee Guida]]__ durante la preparazione del campione.+=== To ask for the service: ===
  
-Contatto: [[marta.ponzi@iss.it|Marta Ponzi]] +  - preliminary contact the [[chi_siamo|MS unit staff]]; 
-> ☎ **+39 06 4990 3134** +  - fill out the online form '​**[[richiesta|Service Request]]**'​ briefly illustrating the scientific problem, type and number of samples etc.; 
-Dove siamoedificio ​**30**, ​piano **A**, ​stanza ​**11**+  - plan a meeting with the unit staff to discuss methods of analysis, costs, timing etc. 
 + 
 +<wrap em>We recommend that you follow the advices in the '​[[linee_guida|Guidelines]]'​ section during sample preparation.</​wrap>​ 
 + 
 +\\ 
 + 
 +Contact: [[serena.camerini@iss.it|Serena Camerini]] 
 +> ☎ **+39 06 4990 3164** 
 +Fax **+39 06 4990 2040** 
 +> Where we arebuilding ​**30**, ​floor **A**, ​room **11** 
 + 
 +/* > FIXME **To be revised.**\\ //(remove this paragraph finished)// */