post-genomische analyse: proteomics Flashcards

1
Q

translationele analyse

A

welke EW eefectief gemaakt

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2
Q

proteomics

A

2D GEF + massa spectrometrie

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3
Q

AL array

A

elke spot verzameling AL die peptide/EW bind

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4
Q

2D GEF

A

1) scheiden pI & grootte
2) kleuren coomassie (welk EW welke spot??)
EW ID via blot met antibody stack

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5
Q

massa spectrometrie

A

EW ID
!! staalvoorbereiding!!
> IEF, WB, 2D GEF, co-IP/WB, SILAC, MALDI-TOF, ESI, MS

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6
Q

MALDI-TOF MS

A

matrix assisted laser desorption ionization time of flight MS
1) staalvoorbereiding (uitkn & herisoleren)
2) proteolyse (trypsine)
3) op matrix
4) MALDI-TOF
> laser op matrix > geïoniseerd EW los matrix > EW door elektrisch veld > tijd tot detector
5) detectie vluchttijd (massa/lading)

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7
Q

ESI-MS

A

elektro spray ionization MS
1) HPLC
2) ESI-MS
> spray geladen druppels > solvent verdampen > EW geladen > versnelling elektrostatisch veld

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8
Q

MS-MS

A

zonder kennis genoom
obv databanken gekende prot
1e = scheiding peptiden > collision induced fragementation
2e = grootte bepalen

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9
Q

SILAC MS-MS + tekening

A

stable isotope labeling by amino acids in cell culture
- kwantitatief: alle exp EW in beeld
p91

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10
Q

in kaart brengen:

A

genexpressie
PTM
prot-prot interactie
secretomics (nieus gesecr EW vs serum-eigen EW)

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11
Q

doelen/methode MS

A
  • identificatie spot/band of mengsel proteïnen
    > SDS-PAGE, IEF, 2G GEF > MS/MS
  • identificatie PTM
    > IP (bead met AL, hoog zout)
  • identificatie interactoom (prot-prot)
    > co-IP (bead met ALx, laag zout y/z ook mee elueren)
  • paarsgewijze vergelijking (SILAC) mengsels de novo peptiden/EW & interacties
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