X-80671276-C-A

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BS1 BS2

The NM_153252.5(BRWD3):c.*5333G>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0013 in 112,005 control chromosomes in the GnomAD database, including 1 homozygotes. There are 44 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0013 (1 hom., 44 hem., cov: 22)
  • Failed GnomAD Quality Control
• Consequence: BRWD3 NM_153252.5 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.698

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 -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BP6: Variant X-80671276-C-A is Benign according to our data. Variant chrX-80671276-C-A is described in ClinVar as [Benign]. Clinvar id is 368692.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.0013 (146/112005) while in subpopulation AMR AF= 0.00351 (37/10530). AF 95% confidence interval is 0.00262. There are 1 homozygotes in gnomad4. There are 44 alleles in male gnomad4 subpopulation. Median coverage is 22. This position pass quality control queck.
• BS2: High Hemizygotes in GnomAd at 44 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BRWD3	NM_153252.5	c.*5333G>T		3_prime_UTR_variant	41/41	ENST00000373275.5
BRWD3	XM_005262113.4	c.*5333G>T		3_prime_UTR_variant	40/40
BRWD3	XM_017029384.2	c.*5333G>T		3_prime_UTR_variant	30/30

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BRWD3	ENST00000373275.5	c.*5333G>T		3_prime_UTR_variant	41/41	1	NM_153252.5	P1

Frequencies

GnomAD3 genomes AF: 0.00130 AC: 146 AN: 111956 Hom.: 1 Cov.: 22 AF XY: 0.00129 AC XY: 44 AN XY: 34140

Gnomad AFR AF: 0.000195

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00352

Gnomad ASJ AF: 0.00189

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00179

Gnomad OTH AF: 0.00200

GnomAD4 exome Data not reliable, filtered out with message: AC0 AC: 0 AN: 0 Hom.: 0 Cov.: 0 AC XY: 0 AN XY: 0

GnomAD4 genome AF: 0.00130 AC: 146 AN: 112005 Hom.: 1 Cov.: 22 AF XY: 0.00129 AC XY: 44 AN XY: 34199

Gnomad4 AFR AF: 0.000194

Gnomad4 AMR AF: 0.00351

Gnomad4 ASJ AF: 0.00189

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00179

Gnomad4 OTH AF: 0.00197

Alfa AF: 0.00164 Hom.: 7

Bravo AF: 0.00169

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	-0.82
Cadd	Benign	0.68
Dann	Benign	0.59

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: rs180875963; hg19: chrX-79926775;