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Table 2 Germline variants detected in SMAD3 and SMAD4 in breast cancer

From: Identification of germline alterations of the mad homology 2 domain of SMAD3 and SMAD4 from the Ontario site of the breast cancer family registry (CFR)

Gene

Exon

Variants

# Times (%)

RefSnp (rs) number

Case/Control

In silicoPrediction

SMAD3

9

IVS9+132A > T

1 (0.25%)

Novel

Case

No effect

SMAD3

7

IVS6-132 C > T

1 (0.18%)

Novel

Control

No effect

 

7

IVS7+69 G > C

4 (0.72%)

rs58056680

Control

No effect

 

8

IVS8-48 T > G

4 (0.72%)

Novel

Control

No effect

 

8

IVS8+161 C > T

1 (0.18%)

Novel

Control

No effect

 

9

IVS8-211 C > T

1 (0.18%)

rs56264428

Control

No effect

 

9

IVS8-170 C > T

1 (0.18%)

Novel

Control

No effect

 

9

IVS8-55 A > G

2 (0.36%)

rs28410524

Control

Abolish branch site

SMAD3

7

IVS6-113 G > T

7 (1.72%); 15 (2.11%)

rs2289791

Case & Control

No effect

 

7

IVS6-95 T > C

4 (0.98%); 15 (2.11%)

rs2289790

Case & Control

No effect

 

8

IVS8+23 A > C

2 (0.49%); 5 (0.70%)

rs55678244

Case & Control

No effect

SMAD4

9

IVS9+118A > G

1 (0.25%)

Novel

Case

No effect

 

10

IVS10+41G > A

1 (0.25%)

Novel

Case

No effect

 

10

c.1350G > A/p.Gln450Gln

1 (0.25%)

Novel

Case

Loss of ESE motifs

 

11

IVS10-33T > A

1 (0.25%)

Novel

Case

Cryptic branch site

SMAD4

8

IVS7-121 A > C

1 (0.18%)

Novel

Control

No effect

 

8

IVS8+44 T > C

1 (0.18%)

rs28539779

Control

No effect

 

9

IVS9+43delTT

1 (0.18%)

Novel

Control

No effect

 

9

IVS9+68delGAA

1 (0.18%)

Novel

Control

No effect

 

9

IVS9+126 del7

1 (0.18%)

Novel

Control

Cryptic branch site

SMAD4

11

IVS10-52 A > T

1 (0.18%)

Novel

Control

Cryptic donor

 

11

c.1701A > G/p.Ile525Val

1 (0.18%)

Novel

Control

No effect

 

11

IVS11+53 A > G

1 (0.18%)

Novel

Control

No effect

SMAD4

8

c.1214T > C/p.Phe362Phe

1 (0.25%); 1 (0.18%)

rs1801250

Case & Control

Loss of ESE motifs

 

8

IVS8+109 A > G

1 (0.25%); 3 (0.42%)

Novel

Case & Control

Cryptic donor

 

10

IVS10+132delA

3 (0.74%); 2 (0.28%)

Novel

Case & Control

No effect

 

11

IVS11+11 C > T

8 (1.96%); 11 (1.55%)

rs1163402

Case & Control

No effect

  1. Note: Variant description is based on HGVS nomenclature. Nucleotide positions were numbered based on genomic sequences of SMAD3 [GenBank:NC_000015.8] and SMAD4 [GenBank:NC_000018.8]. The cDNA sequences referenced were based on nucleic acid sequences for SMAD3 [GenBank:NM_5902] and SMAD4 [GenBank:NM_005359].