2-222221258-AC-A

Variant names:

• chr2-222221258-AC-A
• rs1553572946
• NM_181458.4:c.921delG

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_181458.4(PAX3):​c.921delG​(p.Ser308ArgfsTer73) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PAX3 NM_181458.4 frameshift
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 1.58
• Publications: 0 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)

LOC107985991 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 2-222221258-AC-A is Pathogenic according to our data. Variant chr2-222221258-AC-A is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 547750.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_181458.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PAX3	NM_181458.4	MANE Select	c.921delG	p.Ser308ArgfsTer73	frameshift	Exon 6 of 9	NP_852123.1
	PAX3	NM_181459.4		c.921delG	p.Ser308ArgfsTer73	frameshift	Exon 6 of 10	NP_852124.1
	PAX3	NM_001127366.3		c.918delG	p.Ser307ArgfsTer73	frameshift	Exon 6 of 9	NP_001120838.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PAX3	ENST00000392070.7	TSL:1 MANE Select	c.921delG	p.Ser308ArgfsTer73	frameshift	Exon 6 of 9	ENSP00000375922.3
	PAX3	ENST00000409551.7	TSL:1	c.918delG	p.Ser307ArgfsTer73	frameshift	Exon 6 of 9	ENSP00000386750.3
	PAX3	ENST00000336840.11	TSL:1	c.921delG	p.Ser308ArgfsTer73	frameshift	Exon 6 of 9	ENSP00000338767.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Waardenburg syndrome type 1 Pathogenic:1

Nov 01, 2016

Center for Human Genetics, Inc, Center for Human Genetics, Inc

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

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: rs1553572946; hg19: chr2-223085977;