Modifier	Substrate	Residue	Sequence	Mechanism/Effect	PMID	Interaction ID
PRKACA	GP1BB	Ser191 View in OncoXplorer	ARAAARLsLTDPLVA	phosphorylation down-regulates activity	2504723	SIGNOR-249986

Enzyme	Effect	Phosphosite	Effect	Target	PMID	Interaction ID
PRKACA	phosphorylation up-regulates →	GP1BB PSer191	phosphorylation down-regulates ⊣	GP1BB	2504723	SIGNOR-249986

Regulator	Mechanism/Effect	Target	SIGNOR-ID
PRKACA	phosphorylation → down-regulates activity	GP1BB	SIGNOR-249986