Reaction: ISGylation of host protein filamin B
- in pathway: ISG15 antiviral mechanism
ISG15 negatively regulates the scaffold protein filamin B. In response to type I IFNs, filamin B recruits RAC1, MEKK1, and MKK4, enhancing their sequential activation and thereby promoting JNK activation and apoptosis. ISGylation of filamin B leads to the disassociation of RAC1, MEKK1, and MKK4 from the scaffold, preventing type I IFN dependent JNK activation and apoptosis. It has been suggested that this inhibition of apoptosis may protect uninfected bystander cells from IFN-mediated apoptosis (Jeon et al, 2009).
Reaction - small molecule participants:
PPi [cytosol]
AMP [cytosol]
ATP [cytosol]
Reactome.org reaction link: R-HSA-1169398
======
Reaction input - small molecules:
ATP(4-)
Reaction output - small molecules:
diphosphate(3-)
adenosine 5'-monophosphate(2-)
Reactome.org link: R-HSA-1169398