Table 1 Known interactions in the receptor/β-arrestin/ERK module complex. Interacting amino acids present in the models or compatible are shown in bold, those not found and not easily compatible are shown in italic.

From: Unraveling the molecular architecture of a G protein-coupled receptor/β-arrestin/Erk module complex

Partner 1

Partner 2

Residues/Regions

Ref. and remarks

β-arrestin 2

receptor

L68 V70 L71 L73 V167 L191 S234 Y238 T246

 

β-arrestin 1

receptor

Finger, middle and lariat loops

 

β-arrestin 1

receptor

K77 D78

 

Receptor

β-arrestin 1/2

IL2 IL3

 

Receptor

β-arrestin 1/2

K265

 

β-arrestin 1

c-Src

P91 P121

 

c-Src

β-arrestin 1

SH3 domain

 

β-arrestin 1

Raf1

R307

 

β-arrestin 1 & 2

Raf1

N-domain C-domain

 

β-arrestin 1 & 2

MEK1

N-domain C-domain

 

β-arrestin 1

MEK1

D26 D29

 

MEK1

β-arrestin 1

46-70 R47, K48, R49

 

β-arrestin 2

ERK1

K295

 

β-arrestin 1 & 2

ERK1

N-domain C-domain

 

ERK1

MEK1

T202 Y204

phosphorylated by MEK1

MEK1

Raf1

270-307

 

MEK1

Raf1

S218 S222

19 phosphorylated by Raf1