17-43074337-C-G

Variant names:

• chr17-43074337-C-G
• rs80356906
• NM_007294.4:c.4669G>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM1 BP4 BP6

The NM_001407581.1(BRCA1):​c.4735G>C​(p.Asp1579His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000161 in 1,613,854 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D1579E) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000039 (0 hom., cov: 31)
  • Exomes 𝑓: 0.000014 (0 hom.)
• Consequence: BRCA1 NM_001407581.1 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:7 B:3
• Conservation: PhyloP100: 0.780
• Publications: 14 publications found

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):

• breast-ovarian cancer, familial, susceptibility to, 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, ClinGen, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• Fanconi anemia, complementation group S

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae), ClinGen, 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

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 4 benign, 28 uncertain in NM_001407581.1
• BP4: Computational evidence support a benign effect (MetaRNN=0.4108684).
• BP6: Variant 17-43074337-C-G is Benign according to our data. Variant chr17-43074337-C-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 55255.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001407581.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BRCA1	NM_007294.4	MANE Select	c.4669G>C	p.Asp1557His	missense	Exon 14 of 23	NP_009225.1
	BRCA1	NM_001407581.1		c.4735G>C	p.Asp1579His	missense	Exon 15 of 24	NP_001394510.1
	BRCA1	NM_001407582.1		c.4735G>C	p.Asp1579His	missense	Exon 15 of 24	NP_001394511.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BRCA1	ENST00000357654.9	TSL:1 MANE Select	c.4669G>C	p.Asp1557His	missense	Exon 14 of 23	ENSP00000350283.3
	BRCA1	ENST00000471181.7	TSL:1	c.4732G>C	p.Asp1578His	missense	Exon 15 of 24	ENSP00000418960.2
	BRCA1	ENST00000470026.6	TSL:1	c.4669G>C	p.Asp1557His	missense	Exon 14 of 23	ENSP00000419274.2

Frequencies

GnomAD3 genomes AF: 0.0000394 AC: 6 AN: 152182 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000393

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000159 AC: 4 AN: 251130 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000116

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000137 AC: 20 AN: 1461672 Hom.: 0 Cov.: 31 AF XY: 0.0000110 AC XY: 8 AN XY: 727142

African (AFR) AF: 0.00 AC: 0 AN: 33472

American (AMR) AF: 0.0000671 AC: 3 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86244

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.0000144 AC: 16 AN: 1111846

Other (OTH) AF: 0.0000166 AC: 1 AN: 60380

GnomAD4 genome AF: 0.0000394 AC: 6 AN: 152182 Hom.: 0 Cov.: 31 AF XY: 0.0000538 AC XY: 4 AN XY: 74342

African (AFR) AF: 0.00 AC: 0 AN: 41440

American (AMR) AF: 0.000393 AC: 6 AN: 15266

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5200

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10612

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68044

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000302

ClinVar

ClinVar submissions as Germline

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	2	-	Breast-ovarian cancer, familial, susceptibility to, 1 (2)
-	1	1	Hereditary breast ovarian cancer syndrome (2)
-	1	1	Hereditary cancer-predisposing syndrome (2)
-	2	-	not provided (2)
-	1	-	Familial cancer of breast;C2676676:Breast-ovarian cancer, familial, susceptibility to, 1;C4554406:Fanconi anemia, complementation group S (1)
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Uncertain	0.079	D
BayesDel_noAF	Uncertain	0.10
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.23	T
Eigen	Benign	0.091
Eigen_PC	Benign	0.011
FATHMM_MKL	Benign	0.34	N
LIST_S2	Uncertain	0.93	D
M_CAP	Pathogenic	0.51	D
MetaRNN	Benign	0.41	T
MetaSVM	Uncertain	-0.090	T
MutationAssessor	Benign	1.9	L
PhyloP100		0.78
PrimateAI	Benign	0.34	T
PROVEAN	Uncertain	-2.8	D
REVEL	Uncertain	0.58
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.025	D
Polyphen		0.98	D
Vest4		0.39
MVP		0.90
MPC		0.16
ClinPred		0.49	T
GERP RS		3.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.10
gMVP		0.23
Mutation Taster		=69/31	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
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

Other links and lift over

dbSNP: rs80356906; hg19: chr17-41226354;