Meta-Biol

• Pathways

The following EGFR-binding ERBB2 KD mutants that were shown to activate RAS/RAF/MAPK signaling, evidenced by activating phosphorylation of ERKs (MAPK1 and MAPK3), are assumed to, like the wild type ERBB2:EGFR heterodimer, directly bind to the GRB2:SOS1 complex, leading to activating guanyl nucleotide exchange on RAS:

ERBB2 L755S (Trowe et al. 2008, Kancha et al. 2011, Bose et al. 2013, Cocco et al. 2018);
ERBB2 L755P (Kancha et al. 2011);
ERBB2 I767M (Ng et al. 2015; binding to EGFR indirectly demonstrated by Bose et al. 2013);
ERBB2 D769H (Bose et al. 2013);
ERBB2 V777L (Kancha et al. 2011, Bose et al. 2013);
ERBB2 G778_P780dup (Suzawa et al. 2016);
ERBB2 T798M (Kancha et al. 2011, Rexer et al. 2013);
ERBB2 T798I (Hanker et al. 2017);
ERBB2 V842I (Bose et al. 2013);
ERBB2 T862A (Kancha et al. 2011);
ERBB2 H878Y (Kancha et al. 2011, Hu, Hu et al. 2015, Hu, Wan et al. 2015);
ERBB2 R896C (Bose et al. 2013);
ERBB2 L755_T759del (Bose et al. 2013);
ERBB2 Y772_A775dup (Wang et al. 2006);

Activation of RAS/RAF/MAPK signaling downstream of the following ERBB2 KD cancer mutants has not been studied and they are annotated as candidates:

ERBB2 L755M
ERBB2 L755W
ERBB2 D769Y
ERBB2 D769N
ERBB2 V777M
ERBB2 V777E
ERBB2 T733I
ERBB2 V842E
ERBB2 H878R
ERBB2 R896H