17-43092733-C-T

Variant names:

• chr17-43092733-C-T
• rs80356941
• NM_007294.4:c.2798G>A

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 0P and 3B. BP4_Moderate BP6

The NM_007294.4(BRCA1):​c.2798G>A​(p.Gly933Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000164 in 1,461,816 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict 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. G933C) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000016 (0 hom.)
• Consequence: BRCA1 NM_007294.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:7 B:3
• Conservation: PhyloP100: -0.0750
• Publications: 15 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):

• 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

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.12762246).
• BP6: Variant 17-43092733-C-T is Benign according to our data. Variant chr17-43092733-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 37490.

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BRCA1	NM_007294.4	MANE Select	c.2798G>A	p.Gly933Asp	missense	Exon 10 of 23	NP_009225.1	P38398-1
	BRCA1	NM_001407581.1		c.2798G>A	p.Gly933Asp	missense	Exon 10 of 24	NP_001394510.1	A0A2R8Y7V5
	BRCA1	NM_001407582.1		c.2798G>A	p.Gly933Asp	missense	Exon 10 of 24	NP_001394511.1	A0A2R8Y7V5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BRCA1	ENST00000357654.9	TSL:1 MANE Select	c.2798G>A	p.Gly933Asp	missense	Exon 10 of 23	ENSP00000350283.3	P38398-1
	BRCA1	ENST00000471181.7	TSL:1	c.2798G>A	p.Gly933Asp	missense	Exon 10 of 24	ENSP00000418960.2	P38398-7
	BRCA1	ENST00000470026.6	TSL:1	c.2798G>A	p.Gly933Asp	missense	Exon 10 of 23	ENSP00000419274.2	P38398-1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.0000164 AC: 24 AN: 1461816 Hom.: 0 Cov.: 49 AF XY: 0.0000193 AC XY: 14 AN XY: 727198

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 39690

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53404

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.0000216 AC: 24 AN: 1111972

Other (OTH) AF: 0.00 AC: 0 AN: 60394

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	2	1	Hereditary cancer-predisposing syndrome (3)
-	2	1	not provided (3)
-	2	-	Breast-ovarian cancer, familial, susceptibility to, 1 (2)
-	-	1	Hereditary breast ovarian cancer syndrome (1)
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.097
BayesDel_addAF	Benign	-0.019	T
BayesDel_noAF	Benign	-0.26
CADD	Benign	13
DANN	Benign	0.90
DEOGEN2	Benign	0.16	T
Eigen	Benign	-0.83
Eigen_PC	Benign	-0.81
FATHMM_MKL	Benign	0.13	N
LIST_S2	Benign	0.25	T
M_CAP	Uncertain	0.12	D
MetaRNN	Benign	0.13	T
MetaSVM	Benign	-0.83	T
MutationAssessor	Benign	0.69	N
PhyloP100		-0.075
PrimateAI	Benign	0.29	T
PROVEAN	Benign	-0.45	N
REVEL	Benign	0.29
Sift	Benign	0.058	T
Sift4G	Uncertain	0.058	T
Polyphen		0.0	B
Vest4		0.28
MutPred		0.53		Gain of ubiquitination at K937 (P = 0.0462)
MVP		0.40
MPC		0.11
ClinPred		0.050	T
GERP RS		2.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.043
gMVP		0.088
Mutation Taster		=95/5	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: rs80356941; hg19: chr17-41244750;