chr17-61784342-A-T

Position:

• chr17-61784342-A-T

Variant summary

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

The NM_032043.3(BRIP1):​c.1556T>A​(p.Ile519Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: BRIP1 NM_032043.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 7.75

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]

BRIP1 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BRIP1	NM_032043.3	c.1556T>A	p.Ile519Asn	missense_variant	11/20	ENST00000259008.7	NP_114432.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BRIP1	ENST00000259008.7	c.1556T>A	p.Ile519Asn	missense_variant	11/20	1	NM_032043.3	ENSP00000259008.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Dec 05, 2023	This missense variant replaces isoleucine with asparagine at codon 519 of the BRIP1 protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with BRIP1-related disorders in the literature. This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Jul 26, 2022	The p.I519N variant (also known as c.1556T>A), located in coding exon 10 of the BRIP1 gene, results from a T to A substitution at nucleotide position 1556. The isoleucine at codon 519 is replaced by asparagine, an amino acid with dissimilar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. 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	Pathogenic	0.82
BayesDel_addAF	Uncertain	0.077	D
BayesDel_noAF	Benign	-0.13
CADD	Uncertain	26
DANN	Uncertain	0.99
DEOGEN2	Benign	0.41	T;.
Eigen	Uncertain	0.58
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.89	D;D
M_CAP	Uncertain	0.26	D
MetaRNN	Uncertain	0.55	D;D
MetaSVM	Uncertain	-0.21	T
MutationAssessor	Uncertain	2.6	M;M
PrimateAI	Uncertain	0.63	T
PROVEAN	Uncertain	-3.7	D;.
REVEL	Pathogenic	0.72
Sift	Uncertain	0.0080	D;.
Sift4G	Uncertain	0.0070	D;D
Polyphen		0.99	D;.
Vest4		0.61
MutPred		0.58		Gain of disorder (P = 0.0108);Gain of disorder (P = 0.0108);
MVP		0.93
MPC		0.88
ClinPred		0.99	D
GERP RS		5.4
Varity_R		0.50
gMVP		0.75

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: rs1555603538; hg19: chr17-59861703;