X-80669707-C-T

Position:

• chrX-80669707-C-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Moderate BP6_Moderate BS1 BS2

The NM_153252.5(BRWD3):​c.*6902G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00677 in 111,346 control chromosomes in the GnomAD database, including 6 homozygotes. There are 201 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency: Genomes: 𝑓 0.0068 (6 hom., 201 hem., cov: 23)
• Consequence: BRWD3 NM_153252.5 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 3.05

Genes affected

BRWD3 (HGNC:17342): (bromodomain and WD repeat domain containing 3) The protein encoded by this gene contains a bromodomain and several WD repeats. It is thought to have a chromatin-modifying function, and may thus play a role in transcription. Mutations in this gene are associated with a spectrum of cognitive disabilities and X-linked macrocephaly. This gene is also associated with translocations in patients with B-cell chronic lymphocytic leukemia. [provided by RefSeq, Jul 2017]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.33).
• BP6: Variant X-80669707-C-T is Benign according to our data. Variant chrX-80669707-C-T is described in ClinVar as [Benign]. Clinvar id is 368678.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00677 (754/111346) while in subpopulation AFR AF= 0.0224 (688/30712). AF 95% confidence interval is 0.021. There are 6 homozygotes in gnomad4. There are 201 alleles in male gnomad4 subpopulation. Median coverage is 23. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 6 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BRWD3	NM_153252.5	c.*6902G>A		3_prime_UTR_variant	41/41	ENST00000373275.5
BRWD3	XM_005262113.4	c.*6902G>A		3_prime_UTR_variant	40/40
BRWD3	XM_017029384.2	c.*6902G>A		3_prime_UTR_variant	30/30

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BRWD3	ENST00000373275.5	c.*6902G>A		3_prime_UTR_variant	41/41	1	NM_153252.5	P1

Frequencies

GnomAD3 genomes AF: 0.00679 AC: 756 AN: 111295 Hom.: 6 Cov.: 23 AF XY: 0.00600 AC XY: 201 AN XY: 33517

Gnomad AFR AF: 0.0225

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00517

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00420

Gnomad NFE AF: 0.0000944

Gnomad OTH AF: 0.00402

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.00677 AC: 754 AN: 111346 Hom.: 6 Cov.: 23 AF XY: 0.00599 AC XY: 201 AN XY: 33578

Gnomad4 AFR AF: 0.0224

Gnomad4 AMR AF: 0.00516

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000944

Gnomad4 OTH AF: 0.00397

Alfa AF: 0.00413 Hom.: 10

Bravo AF: 0.00768

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Intellectual disability, X-linked 93 Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.33
CADD	Benign	7.7
DANN	Benign	0.81

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs188498975; hg19: chrX-79925206;