1. A B C ErbB3 protein levels ERBB3 mRNA levels P = 0.009 P = 0.716
RPPA score ESR1 P-S118
RPPA score ESR1 P-S118
ErbB3 high
ErbB3 low
ERBB3 high
ERBB3 low
Supp Fig. S1.
Oncoprint analysis of TCGA-curated Luminal A/B breast cancers demonstrating ErbB3 protein upregulation (based on RPPA score) in 13% of all Luminal A/B tumors (N = 324). Subtype row indicates Luminal A (Green) and Luminal B (Blue).
TCGA curated luminal A/B breast cancers were bifurcated into tumors with high ErbB3 protein expression (based on RPPA score) and assessed for ESR1 P-S118 RPPA scores.
TCGA curated luminal A/B breast cancers were bifurcated into tumors with high ERBB3 mRNA expression and assessed for ESR1 P-S118 RPPA scores.

2. ErbB3 (RPPA score)
NEDD4 high
NEDD4 low
Supp Fig. S2. TCGA curated luminal A/B breast cancers were bifurcated into tumors with high NEDD4 mRNA expression and assessed for ErbB3 RPPA scores.

3. Nrdp1 (201961_s_at) NEDD4 (213012_at)
months
months
Supp Fig. S3. Transcript levels of Nrdp1 and NEDD4 were assessed in tamoxifen-treated breast cancer expression microarray datasets and used to generate a Kaplan-Meier survival curve using KmPlot.com. Analysis included all tumors treated with or without chemotherapy, and excluded all samples not treated with tamoxifen. The probes used for analysis are indicated at top of panel.

4. P-ESR1 S118 (RPPA score) LRIG1 mRNA levels Nrdp1 mRNA levels
NEDD4 mRNA levels
P = 0.003
P-ESR1 S118 (RPPA score)
LRIG1 high
LRIG1 low
Nrdp1 high
Nrdp1 low
NEDD4 high
NEDD4 low
P = 0.617
P = 0.490
Supp Fig. S4. Using TCGA-curated luminal breast cancer datasets, the RPPA protein score for ESR1 (ER) P-S118 was plotted for those tumors with high LRIG1, NRDP1, and NEDD4 mRNA expression as compared to the remaining luminal tumors. Midlines represent average, whiskers indicate S.D. Analysis was performed on cBioPortal.org.