rs1555593260

Positions:

• chr17-43094810-G-A
• chr17-43094810-G-C
• chr17-43094810-G-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_007294.4(BRCA1):​c.721C>T​(p.Pro241Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,444 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P241L) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: BRCA1 NM_007294.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.259

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 Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.019541144).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BRCA1	NM_007294.4	c.721C>T	p.Pro241Ser	missense_variant	10/23	ENST00000357654.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BRCA1	ENST00000357654.9	c.721C>T	p.Pro241Ser	missense_variant	10/23	1	NM_007294.4	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461444 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 727028

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.071
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.010
CADD	Benign	0.35
DANN	Benign	0.68
DEOGEN2	Benign	0.075	T;.;.;.;.;.;T;.;T;.;T;T;.;T
Eigen	Benign	-1.5
Eigen_PC	Benign	-1.4
FATHMM_MKL	Benign	0.011	N
LIST_S2	Benign	0.74	T;T;T;T;T;T;T;T;T;T;T;T;T;T
M_CAP	Benign	0.073	D
MetaRNN	Benign	0.020	T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.36	T
MutationAssessor	Benign	-2.3	N;N;N;.;N;.;.;.;.;.;.;.;.;.
MutationTaster	Benign	1.0	N;N;N;N;N;N;N;N;N;N;N;N;N;N
PrimateAI	Benign	0.22	T
PROVEAN	Benign	0.27	N;N;N;N;N;N;N;N;N;N;.;N;N;N
REVEL	Uncertain	0.56
Sift	Benign	0.68	T;T;T;T;T;T;T;T;T;T;.;T;T;T
Sift4G	Benign	1.0	T;T;T;T;T;.;.;T;.;T;.;T;.;T
Polyphen		0.0	B;.;.;.;B;.;B;.;.;B;.;.;.;.
Vest4		0.23
MutPred		0.10		Gain of phosphorylation at P241 (P = 0.1328);Gain of phosphorylation at P241 (P = 0.1328);Gain of phosphorylation at P241 (P = 0.1328);.;Gain of phosphorylation at P241 (P = 0.1328);.;.;.;.;Gain of phosphorylation at P241 (P = 0.1328);.;Gain of phosphorylation at P241 (P = 0.1328);.;Gain of phosphorylation at P241 (P = 0.1328);
MVP		0.41
MPC		0.081
ClinPred		0.045	T
GERP RS		-0.13
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.022
gMVP		0.14

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-41246827;