chr17-43104223-A-G

Position:

• chr17-43104223-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_007294.4(BRCA1):​c.340T>C​(p.Ser114Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as not provided (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S114C) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: BRCA1 NM_007294.4 missense
• Clinical Significance: not provided no classification provided O:1
• Conservation: PhyloP100: 0.705

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.805

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BRCA1	NM_007294.4	c.340T>C	p.Ser114Pro	missense_variant	6/23	ENST00000357654.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BRCA1	ENST00000357654.9	c.340T>C	p.Ser114Pro	missense_variant	6/23	1	NM_007294.4	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: not provided

Submissions summary: Other:1

Revision: no classification provided

Submissions by phenotype

Familial cancer of breast Other:1

not provided, no classification provided

literature only

ClinVar Staff, National Center for Biotechnology Information (NCBI)

-

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Pathogenic	0.32	D
BayesDel_noAF	Pathogenic	0.22
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.25	.;T;.;.;.;.;.;T;.;T;.;T;T;.;T;T;.
Eigen	Benign	-0.019
Eigen_PC	Benign	-0.0016
FATHMM_MKL	Benign	0.50	D
LIST_S2	Uncertain	0.94	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
M_CAP	Pathogenic	0.66	D
MetaRNN	Pathogenic	0.80	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.73	D
MutationAssessor	Uncertain	2.5	M;M;M;M;.;M;.;.;.;.;.;.;.;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;N;N;N;N;N;N;N;N;N;N
PrimateAI	Benign	0.39	T
PROVEAN	Benign	-1.4	N;N;N;N;N;N;N;N;N;N;N;.;N;N;N;D;D
REVEL	Pathogenic	0.66
Sift	Uncertain	0.020	D;D;D;D;D;D;D;D;D;D;D;.;D;D;D;D;D
Sift4G	Benign	0.084	T;D;D;D;D;D;.;.;T;.;D;.;D;.;D;.;.
Polyphen		0.033, 0.99, 0.25	.;B;.;.;.;D;.;.;.;.;B;.;.;.;.;.;.
Vest4		0.49
MutPred		0.75		Gain of catalytic residue at S114 (P = 5e-04);Gain of catalytic residue at S114 (P = 5e-04);Gain of catalytic residue at S114 (P = 5e-04);Gain of catalytic residue at S114 (P = 5e-04);.;Gain of catalytic residue at S114 (P = 5e-04);.;Gain of catalytic residue at S114 (P = 5e-04);.;.;Gain of catalytic residue at S114 (P = 5e-04);Gain of catalytic residue at S114 (P = 5e-04);Gain of catalytic residue at S114 (P = 5e-04);.;Gain of catalytic residue at S114 (P = 5e-04);Gain of catalytic residue at S114 (P = 5e-04);.;
MVP		0.87
MPC		0.44
ClinPred		0.82	D
GERP RS		1.6
Varity_R		0.14
gMVP		0.52

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

Publications

LitVar

Other links and lift over

dbSNP: rs397509062; hg19: chr17-41256240;