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samenvatting H10

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Samenvatting van 10 pagina's voor het vak Bioinformatica aan de UA (samenvatting H10)

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  • December 30, 2023
  • 10
  • 2023/2024
  • Summary
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CHAPTER 10

INTRODUCTION

- Tot nu toe nucleotide sequenties bestuderen
- Nu vnl technieken die op andere lagen inwerken dan DNA/RNA (proteoom, metaboloom, …)
o Proteoom = alle proteinen in een systeel op een gegeven tijdstip
o Metaboloom = molculen in een cel


PROTEINS ARE CHAINS OF AA

General amino acid structure

- Central carbon
- Amino group
- Carboxyl group
- Side chain (R)

Er zijn 20 standaard AZ

Zijgroep is zeer belangrijk is ook wel de differentiator

Ketens maken via een peptidebinding, eiwitten zijn ketens van AZ




A PRIMER TO MS


MASS SPECTROMETRY

- technology that measures the molecular mass of the present molecules based on its
mass to charge ratio (m/z)
- kan gebruikt worden om een moleculair gewicht te berekenen
- wide range of applications, including proteomics and metabolomics

ioniseren is een voorwaarde om MS te gebruiken

- meest gebruikte techniek voor small molecules analyse als ook peptiden en
proteinen
- vaak via peptiden

, basisprincipes

3 componenten
1) ionenbron
à zet om in ionen
(ESI), (APCI) en (MALDI)
2) Mass analyzer
à sorteren op basis van m/z
(TOF), (quadruple), …
3) Detector
à de waarde meten

MALDI

= matrix assisted laser desorption ionization




Tijd is proportioneel tot de massa over de lading ratio
à levert een spectrum op die allemaal een intensiteit kennen

ESI

= electrospray ionization




Detectors

- spectrum van massa/lading en intensiteit
- mengsel van peptide dat bekomen is door klieving met peptides
- conclusie = massa over lading is hetzelfde à elk fragment komt overeen met een
bepaalde massa in het spectrum

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