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Samenvatting Cellular Signaltransduction (minor DSDT) $12.85
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Samenvatting Cellular Signaltransduction (minor DSDT)

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Uitgebreide samenvatting van alle colleges behalve het laatste college over: Cytokines as mediators of T cell immunity

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  • July 10, 2023
  • 75
  • 2022/2023
  • Summary
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Signaling by kinases and phosphatases
Kinases en fosfatases: regulate the positioning of a phosphate group on a substrate.
- Kinases: voegen een fosfaat toe aan een substraat (fosforylatie)
- Fosfatases: verwijdert een fosfaat van een substraat (defosforylatie)

De structuur van het eiwit wordt veranderd omdat een aminozuur met een fosfaat wordt
gehecht.
- 500 protein kinases genes → encodes for a kinase
- 2% of all genes are kinases

In een cel: 10-15% van de eiwitten zijn gemodificeerd door fosforylatie
- Het kan de functie of locatie van het eiwit veranderen
- Fosforylatie ontstaat meestal op 3 aminozuren: serine, threonine en tyrosine
- 2 types:
o Serine/threonine kinases
o Tyrosine kinases

Tyrosine-specific protein kinases:




Extracellulair

Intracellulair




Extracellulair is erg verschillend, want al die receptoren binden aan verschillende liganden.
Intracellulair: kinases, zijn wel redelijk gelijk

, Inhibitors op de kinases ontwikkelen is lastig, want ze lijken op elkaar.

Signaaltransductie:




In de kern




EGFR: Epidermal Growth Factor receptor
Kinase domain, hier ook wel Src homology region genoemd omdat hij heel erg lijkt op de
prototype non receptor tyrosine kinase (wat Src wordt genoemd). Dat Src region is
gefuseerd in de backbone.




EGFR zit in de ErbB familie:

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