dbSNP rs80356839: BRCA1:p.Pro25Pro (chr17-43124022-G-A) – ACMG Classification: Benign (-17 pts)

Variant summary

Our verdict is Benign. The variant received -17 ACMG points: 0P and 17B. BP4_StrongBP6_Very_StrongBP7BS2

The NM_007294.4(BRCA1):c.75C>T(p.Pro25Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000596 in 1,610,856 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★★). Synonymous variant affecting the same amino acid position (i.e. P25P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000062 ( 3 hom. )

Consequence

BRCA1
NM_007294.4 synonymous

Scores

Clinical Significance

Likely benign reviewed by expert panel B:20

Conservation

PhyloP100: -0.455

Publications

6 publications found

Variant links:

Genes affected

BRCA1 (HGNC:1100): (BRCA1 DNA repair associated) This gene encodes a 190 kD nuclear phosphoprotein that plays a role in maintaining genomic stability, and it also acts as a tumor suppressor. The BRCA1 gene contains 22 exons spanning about 110 kb of DNA. The encoded protein combines with other tumor suppressors, DNA damage sensors, and signal transducers to form a large multi-subunit protein complex known as the BRCA1-associated genome surveillance complex (BASC). This gene product associates with RNA polymerase II, and through the C-terminal domain, also interacts with histone deacetylase complexes. This protein thus plays a role in transcription, DNA repair of double-stranded breaks, and recombination. Mutations in this gene are responsible for approximately 40% of inherited breast cancers and more than 80% of inherited breast and ovarian cancers. Alternative splicing plays a role in modulating the subcellular localization and physiological function of this gene. Many alternatively spliced transcript variants, some of which are disease-associated mutations, have been described for this gene, but the full-length natures of only some of these variants has been described. A related pseudogene, which is also located on chromosome 17, has been identified. [provided by RefSeq, May 2020]

BRCA1 Gene-Disease associations (from GenCC):

BRCA1-related cancer predisposition
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
breast-ovarian cancer, familial, susceptibility to, 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics
Fanconi anemia, complementation group S
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, LIMITED Submitted by: G2P, ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics
pancreatic cancer, susceptibility to, 4
Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
hereditary breast ovarian cancer syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Fanconi anemia
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

BRCA1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -17 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.57).

BP6

Variant 17-43124022-G-A is Benign according to our data. Variant chr17-43124022-G-A is described in ClinVar as Likely_benign. ClinVar VariationId is 55691.Status of the report is reviewed_by_expert_panel, 3 stars.

BP7

Synonymous conserved (PhyloP=-0.455 with no splicing effect.

BS2

High Homozygotes in GnomAdExome4 at 3 AR,AD gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_007294.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
BRCA1	NM_007294.4	MANE Select	c.75C>T	p.Pro25Pro	synonymous	Exon 2 of 23	NP_009225.1	P38398-1
BRCA1	NM_001407581.1		c.75C>T	p.Pro25Pro	synonymous	Exon 2 of 24	NP_001394510.1	A0A2R8Y7V5
BRCA1	NM_001407582.1		c.75C>T	p.Pro25Pro	synonymous	Exon 2 of 24	NP_001394511.1	A0A2R8Y7V5

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
BRCA1	ENST00000357654.9	TSL:1 MANE Select	c.75C>T	p.Pro25Pro	synonymous	Exon 2 of 23	ENSP00000350283.3	P38398-1
BRCA1	ENST00000471181.7	TSL:1	c.75C>T	p.Pro25Pro	synonymous	Exon 2 of 24	ENSP00000418960.2	P38398-7
BRCA1	ENST00000470026.6	TSL:1	c.75C>T	p.Pro25Pro	synonymous	Exon 2 of 23	ENSP00000419274.2	P38398-1

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152148

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000385

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000955

GnomAD2 exomes

AF:

0.0000239

AC:

AN:

251038

AF XY:

0.00000737

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000326

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000617

AC:

AN:

1458708

Hom.:

Cov.:

AF XY:

0.0000386

AC XY:

AN XY:

725934

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33394

American (AMR)

AF:

0.00

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26108

East Asian (EAS)

AF:

0.000504

AC:

AN:

39646

South Asian (SAS)

AF:

0.00

AC:

AN:

86198

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5754

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1109200

Other (OTH)

AF:

0.00113

AC:

AN:

60278

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152148

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74326

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41414

American (AMR)

AF:

0.000131

AC:

AN:

15276

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.000385

AC:

AN:

5198

South Asian (SAS)

AF:

0.00

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10602

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68042

Other (OTH)

AF:

0.000955

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000145

Hom.:

Bravo

AF:

0.0000756

Asia WGS

AF:

0.00664

AC:

AN:

3478

ClinVar

ClinVar submissions

Significance:Likely benign

Revision:reviewed by expert panel

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (5)

not provided (4)

Breast-ovarian cancer, familial, susceptibility to, 1 (3)

Hereditary cancer-predisposing syndrome (3)

Hereditary breast ovarian cancer syndrome (2)

Breast and/or ovarian cancer (1)

Familial cancer of breast (1)

Malignant tumor of breast (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.57

CADD

Benign

8.4

(source)

DANN

Benign

0.82

PhyloP100

-0.46

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Mutation Taster

=92/8

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

Splicevardb

1.0

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over