chr2-222201724-G-A

Position:

• chr2-222201724-G-A

Variant summary

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

The NM_181458.4(PAX3):​c.1420+220C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00206 in 1,459,256 control chromosomes in the GnomAD database, including 50 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.010 (23 hom., cov: 31)
  • Exomes 𝑓: 0.0011 (27 hom.)
• Consequence: PAX3 NM_181458.4 intron
• Clinical Significance: Benign criteria provided, single submitter B:2
• Conservation: PhyloP100: 2.73

Genes affected

PAX3 (HGNC:8617): (paired box 3) This gene is a member of the paired box (PAX) family of transcription factors. Members of the PAX family typically contain a paired box domain and a paired-type homeodomain. These genes play critical roles during fetal development. Mutations in paired box gene 3 are associated with Waardenburg syndrome, craniofacial-deafness-hand syndrome, and alveolar rhabdomyosarcoma. The translocation t(2;13)(q35;q14), which represents a fusion between PAX3 and the forkhead gene, is a frequent finding in alveolar rhabdomyosarcoma. Alternative splicing results in transcripts encoding isoforms with different C-termini. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.38).
• BP6: Variant 2-222201724-G-A is Benign according to our data. Variant chr2-222201724-G-A is described in ClinVar as [Benign]. Clinvar id is 334551.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0104 (1578/151486) while in subpopulation AFR AF= 0.0359 (1481/41252). AF 95% confidence interval is 0.0344. There are 23 homozygotes in gnomad4. There are 743 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 23 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PAX3	NM_181458.4	c.1420+220C>T		intron_variant		ENST00000392070.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PAX3	ENST00000392070.7	c.1420+220C>T		intron_variant		1	NM_181458.4	A1

Frequencies

GnomAD3 genomes AF: 0.0104 AC: 1568 AN: 151370 Hom.: 23 Cov.: 31

Gnomad AFR AF: 0.0358

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00508

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000208

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.0000736

Gnomad OTH AF: 0.00529

GnomAD4 exome AF: 0.00110 AC: 1433 AN: 1307770 Hom.: 27 Cov.: 30 AF XY: 0.00101 AC XY: 646 AN XY: 638446

Gnomad4 AFR exome AF: 0.0416

Gnomad4 AMR exome AF: 0.00252

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000331

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000420

Gnomad4 OTH exome AF: 0.00210

GnomAD4 genome AF: 0.0104 AC: 1578 AN: 151486 Hom.: 23 Cov.: 31 AF XY: 0.0100 AC XY: 743 AN XY: 73946

Gnomad4 AFR AF: 0.0359

Gnomad4 AMR AF: 0.00507

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000736

Gnomad4 OTH AF: 0.00666

Alfa AF: 0.00707 Hom.: 2

Bravo AF: 0.0119

Asia WGS AF: 0.00924 AC: 32 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, single submitter

Submissions by phenotype

Craniofacial-deafness-hand syndrome Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 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. -

Waardenburg syndrome Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 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	-0.38
CADD	Benign	17
DANN	Benign	0.82

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: rs45624434; hg19: chr2-223066443;