chr20-21709329-G-GGGCCC

Variant names:

• chr20-21709329-G-GGGCCC
• rs1555804780
• NM_001257096.2:c.1169_1173dupGCCCG

Variant summary

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

The NM_001257096.2(PAX1):​c.1169_1173dupGCCCG​(p.Pro392AlafsTer19) variant causes a frameshift change involving the alteration of a 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: PAX1 NM_001257096.2 frameshift
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 7.34
• Publications: 2 publications found

Genes affected

PAX1 (HGNC:8615): (paired box 1) 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. This gene plays a role in pattern formation during embryogenesis and may be essential for development of the vertebral column. This gene is silenced by methylation in ovarian and cervical cancers and may be a tumor suppressor gene. Mutations in this gene are also associated with vertebral malformations. [provided by RefSeq, Mar 2012]

PAX1 Gene-Disease associations (from GenCC):

• otofaciocervical syndrome 2

  Inheritance: AR, AD Classification: DEFINITIVE, STRONG, LIMITED Submitted by: ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae), PanelApp Australia, G2P

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 20-21709329-G-GGGCCC is Pathogenic according to our data. Variant chr20-21709329-G-GGGCCC is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 522604.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001257096.2. 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
	PAX1	NM_001257096.2	MANE Select	c.1169_1173dupGCCCG	p.Pro392AlafsTer19	frameshift	Exon 4 of 5	NP_001244025.1
	PAX1	NM_006192.5		c.1169_1173dupGCCCG	p.Pro392AlafsTer19	frameshift	Exon 4 of 5	NP_006183.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PAX1	ENST00000613128.5	TSL:1 MANE Select	c.1169_1173dupGCCCG	p.Pro392AlafsTer19	frameshift	Exon 4 of 5	ENSP00000481334.1
	PAX1	ENST00000398485.6	TSL:5	c.1169_1173dupGCCCG	p.Pro392AlafsTer19	frameshift	Exon 4 of 5	ENSP00000381499.2
	PAX1	ENST00000444366.2	TSL:2	c.1097_1101dupGCCCG	p.Pro368AlafsTer19	frameshift	Exon 3 of 4	ENSP00000410355.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Otofaciocervical syndrome 2 Pathogenic:2

Dec 26, 2019

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Jan 01, 2017

Diagnostics Division, CENTRE FOR DNA FINGERPRINTING AND DIAGNOSTICS

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		7.3
Mutation Taster		=6/194	disease causing (ClinVar)

Splicing

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

Other links and lift over

dbSNP: rs1555804780; hg19: chr20-21689967;