rs763579793

Positions:

• chr17-61683303-A-C
• chr17-61683303-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_032043.3(BRIP1):​c.3743T>G​(p.Phe1248Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,456,214 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. F1248L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: BRIP1 NM_032043.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 0.280

Genes affected

BRIP1 (HGNC:20473): (BRCA1 interacting helicase 1) The protein encoded by this gene is a member of the RecQ DEAH helicase family and interacts with the BRCT repeats of breast cancer, type 1 (BRCA1). The bound complex is important in the normal double-strand break repair function of breast cancer, type 1 (BRCA1). This gene may be a target of germline cancer-inducing mutations. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.11916947).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BRIP1	NM_032043.3	c.3743T>G	p.Phe1248Cys	missense_variant	20/20	ENST00000259008.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BRIP1	ENST00000259008.7	c.3743T>G	p.Phe1248Cys	missense_variant	20/20	1	NM_032043.3	P2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000799 AC: 2 AN: 250400 Hom.: 0 AF XY: 0.00000739 AC XY: 1 AN XY: 135338

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000581

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS 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: 0.00000137 AC: 2 AN: 1456214 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 724804

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000448

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Familial cancer of breast;C1836860:Fanconi anemia complementation group J Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Dec 17, 2023

This sequence change replaces phenylalanine, which is neutral and non-polar, with cysteine, which is neutral and slightly polar, at codon 1248 of the BRIP1 protein (p.Phe1248Cys). This variant is present in population databases (rs763579793, gnomAD 0.006%). This variant has not been reported in the literature in individuals affected with BRIP1-related conditions. ClinVar contains an entry for this variant (Variation ID: 530295). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be tolerated. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 15, 2023

The p.F1248C variant (also known as c.3743T>G), located in coding exon 19 of the BRIP1 gene, results from a T to G substitution at nucleotide position 3743. The phenylalanine at codon 1248 is replaced by cysteine, an amino acid with highly dissimilar properties. This amino acid position is poorly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.079
BayesDel_addAF	Benign	-0.26	T
BayesDel_noAF	Benign	-0.44
CADD	Benign	15
DANN	Benign	0.74
DEOGEN2	Benign	0.079	T
Eigen	Benign	-0.79
Eigen_PC	Benign	-0.84
FATHMM_MKL	Benign	0.070	N
LIST_S2	Benign	0.24	T
M_CAP	Benign	0.067	D
MetaRNN	Benign	0.12	T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	0.0	N
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.41	T
PROVEAN	Benign	-0.19	N
REVEL	Benign	0.13
Sift	Benign	0.037	D
Sift4G	Pathogenic	0.0	D
Polyphen		0.69	P
Vest4		0.14
MutPred		0.20		Loss of solvent accessibility (P = 0.002);
MVP		0.67
MPC		0.39
ClinPred		0.085	T
GERP RS		0.77
Varity_R		0.077
gMVP		0.077

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: rs763579793; hg19: chr17-59760664;