2-222202192-TAA-TAAA

Variant names:

• chr2-222202192-T-TA
• rs749733628
• NM_181458.4:c.1174-3dupT

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

The NM_181458.4(PAX3):​c.1174-3dupT variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000114 in 1,581,262 control chromosomes in the GnomAD database, with no homozygous occurrence. 1/1 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 31)
  • Exomes 𝑓: 0.000011 (0 hom.)
• Consequence: PAX3 NM_181458.4 splice_region, intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.63
• Publications: 1 publications found

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]

PAX3 Gene-Disease associations (from GenCC):

• craniofacial-deafness-hand syndrome

  Inheritance: AD, Unknown Classification: DEFINITIVE, SUPPORTIVE, LIMITED Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae)
• Waardenburg syndrome

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• Waardenburg syndrome type 1

  Inheritance: AR, AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: PanelApp Australia, G2P, Orphanet, Labcorp Genetics (formerly Invitae)
• Waardenburg syndrome type 3

  Inheritance: AR, AD Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PAX3	NM_181458.4	c.1174-3dupT		splice_region_variant, intron_variant	Intron 7 of 8	ENST00000392070.7	NP_852123.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PAX3	ENST00000392070.7	c.1174-3_1174-2insT		splice_region_variant, intron_variant	Intron 7 of 8	1	NM_181458.4	ENSP00000375922.3

Frequencies

GnomAD3 genomes AF: 0.0000132 AC: 2 AN: 152040 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.0000242

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000149 AC: 3 AN: 201426 AF XY: 0.00000929

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000689

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000116

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000112 AC: 16 AN: 1429222 Hom.: 0 Cov.: 32 AF XY: 0.0000127 AC XY: 9 AN XY: 708770

African (AFR) AF: 0.0000305 AC: 1 AN: 32744

American (AMR) AF: 0.0000495 AC: 2 AN: 40384

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25652

East Asian (EAS) AF: 0.0000261 AC: 1 AN: 38316

South Asian (SAS) AF: 0.0000120 AC: 1 AN: 82996

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51808

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5520

European-Non Finnish (NFE) AF: 0.00000915 AC: 10 AN: 1092624

Other (OTH) AF: 0.0000169 AC: 1 AN: 59178

GnomAD4 genome AF: 0.0000132 AC: 2 AN: 152040 Hom.: 0 Cov.: 31 AF XY: 0.0000135 AC XY: 1 AN XY: 74260

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.0000242 AC: 1 AN: 41386

American (AMR) AF: 0.0000655 AC: 1 AN: 15268

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4818

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10588

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68006

Other (OTH) AF: 0.00 AC: 0 AN: 2086

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		1.6

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

Other links and lift over

dbSNP: rs749733628; hg19: chr2-223066911; COSMIC: COSV60588495;