pompes ATP dépendantes Flashcards

1
Q

type P rôle

A

maintenir gradient de principaux ions cellulaires

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2
Q

domaines type P

A

N (liaison nucléotide)
P (liaison phosphate)
M (transmembranaire)

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3
Q

cycle type P

A

phosphorylation-déphosphorylation

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4
Q

fonctionnement P

A
  1. lie Na+
  2. hydrolyse ATP
  3. gp lie à pompe
  4. change conformation
  5. libère Na+
  6. attirer K+
  7. libère gp
    recommmence
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5
Q

type ABC rôle

A

ATP-Binding-Cassette
transporter unidirectionel ions inorganiques et molécules

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6
Q

fonctionnement ABC

A
  1. liaison substrat = dimérisation
  2. cytoplamse: ATP lie à ATPase
  3. ATP hydrolysé = ADP
  4. relâchement substrat à autre côté
    X phosphorylation
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