Skip to main content
. 2019 Sep 19;2(3):680–709. doi: 10.20517/cdr.2019.006

Table 2.

Germline (G) and somatic (S) mutations affecting coding (c) and non-coding (nc) regions of ABC genes in primary liver cancer

Gene Protein Genetic mutations G/S Region Protein mutations Functional consequences Clinical consequences Studies References
ABCB1 MDR1 c.1537A>T S c Ile513Phe     Moderate ND TCGA-LIHC      TCGA
c.2621T>C S c Val874Ala     Moderate ND TCGA-LIHC      TCGA
c.20G>A S c Arg7His     Moderate ND TCGA-LIHC      TCGA
c.246delA S c Gly83Efs*3     High ND TCGA-LIHC      TCGA
c.466A>T S c Met156Leu     Moderate ND TCGA-LIHC      TCGA
c.1827A>T S c Lys609Asn     Moderate ND TCGA-LIHC      TCGA
c.28887T>G S c Leu963Trp     Moderate ND TCGA-LIHC      TCGA
c.590T>A S c Met197Lys     Moderate ND TCGA-LIHC      TCGA
c.3435C>T S c Ile1145=     ND Higher risk of HCC recurrence HCC patients      [50]
ABCC1 MRP1 c.2512A>G S c Ile838Val     Moderate ND TCGA-LIHC      TCGA
c.854C>A S c Pro285Gln     Moderate ND TCGA-LIHC      TCGA
c.2296G>A S c Val766Met     Moderate ND TCGA-CHOL      TCGA
c.2281A>T S c Ile761Phe     Moderate
    Moderate
ND TCGA-LIHC      TCGA
c.2195T>A S c Leu732Gln     Moderate ND TCGA-LIHC      TCGA
c.-1666G>A S   nc Promoter     ND Lower expression HCC patients      [57]
c.-260G>C S   nc Promoter     ND Higher expression HepG2 and Hep3B cells      [58]
ABCC2 MRP2 c.3737T>A S c Leu1246His     Moderate ND TCGA-LIHC      TCGA
c.71C>A S c Pro24Gln     Moderate ND TCGA-CHOL      TCGA
c.1781G>A S c Ser594Asn     Moderate ND TCGA-LIHC      TCGA
c.2810A>G S c Asn937Ser     Moderate ND TCGA-LIHC      TCGA
c.715G>T S c Val239Leu     Moderate ND TCGA-LIHC      TCGA
c.1249G>A S c Val471Ile     ND Sorafenib efflux HEK cells      [59]
c.3972C>T S c Ile1324=     ND Lower expression Patients with CCA      [60]
c.-58A>C S   nc 5´ UTR     Modifier ND TCGA-LIHC      TCGA
c.-24C>T S   nc 5’ UTR     ND Higher expression Luciferase assay      [61]
ABCC3 MRP3 c.1666_1671dupTACGTG S c Tyr556_Val557     Moderate ND TCGA-LIHC      TCGA
c.614A>C S c Asn205Thr     Moderate ND TCGA-LIHC      TCGA
c.423G>T S c Trp141Cys     Moderate ND TCGA-LIHC      TCGA
c.422G>T S c Trp141Leu     Moderate ND TCGA-LIHC      TCGA
c.800C>A S c Thr267Lys     Moderate ND TCGA-LIHC      TCGA
c.1558G>A S c Gly520Ser     Moderate ND TCGA-LIHC      TCGA
c.2120A>G S c Glu707Gly     Moderate ND TCGA-LIHC      TCGA
c.1936A>C S c Ser646Arg     Moderate ND TCGA-LIHC      TCGA
c.-211C>T S   nc 5’ UTR     ND Lower expression
Same expression
Healthy liver      [62]
     [63]
c.*179-9_*179-7delTCC S   nc Intron     Modifier ND TCGA-LIHC      TCGA
ABCC4 MRP4 c.1024C>A S c Leu342Ile     Moderate ND TCGA-LIHC      TCGA
c.994G>A S c Val332Met     Moderate ND TCGA-LIHC      TCGA
c.382T>G S c Ser128Ala     Moderate ND TCGA-LIHC      TCGA
c.2174A>T S c Gln725Leu     Moderate ND TCGA-LIHC      TCGA
c.1037T>A S c Ile346Asn     Moderate ND TCGA-LIHC      TCGA
c.1785G>C S c Gln595His     Moderate ND TCGA-LIHC      TCGA
ABCC5 MRP5 c.1745A>T S c Asp582Val     Moderate ND TCGA-LIHC      TCGA
c.3724C>T S c Arg1242Cys     Moderate ND TCGA-LIHC      TCGA
c.4145T>C S c Leu1382Phe     Moderate ND TCGA-LIHC      TCGA
ABCG2 BCRP c.34G>A G c Val12Met     ND Altered sorafenib pharmacokinetics HCC patients      [43]
g.89078924T>C G c Intron     ND Altered sorafenib pharmacokinetics HCC patients      [43]
c.734C>G S c Phe245Arg     Moderate ND TCGA-LIHC      TCGA
c.1500G>T S c Lys500Asn     Moderate ND TCGA-CHOL      TCGA
c.745A>G S   nc Ile249Val     Moderate ND TCGA-LIHC      TCGA
g.89073197A>G S   nc Enhancer region     ND Lower expression HepG2 cells      [64]
g.88924371A>G S   nc Enhancer region     ND Lower expression HepG2 cells      [64]
g.89189602G>A S   nc Enhancer region     ND Lower expression HepG2 cells      [64]
ABCG2RE1*2 S   nc Enhancer region     ND Lower expression HepG2 cells      [64]
g.89026428A>C S   nc Enhancer region     ND Higher expression HepG2 cells      [64]

Data obtained from referred literature and TCGA database. Functional consequences are based on VEP (Variant Effect Predictor; https://www.ensembl.org/vep) impact: High means that the variant is supposed to cause a high disruptive impact in the protein, which is likely to cause loss of function; Moderate means that the variant may be not disruptive, but results in a decrease effectiveness of the encoded protein; Modifier is usually referred to non-coding variants, whose impact is difficult to determine, although they can be involved in transcription or splicing changes. CCA: cholangiocarcinoma; HCC: hepatocellular carcinoma; ND: not described; TCGA: the cancer genome atlas; TCGA-LIHC: the cancer genome atlas - liver hepatocellular carcinoma; TCGA-CHOL: the cancer genome atlas - cholangiocarcinoma