11-31802719-AA-G

Variant names:

• chr11-31802719-AA-G
• rs1131692287
• NM_001368894.2:c.125_126delTTinsC

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_001368894.2(PAX6):​c.125_126delTTinsC​(p.Ile42ThrfsTer26) variant causes a frameshift, synonymous 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 Pathogenic (no stars). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 31)
• Consequence: PAX6 NM_001368894.2 frameshift, synonymous
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.27
• Publications: 0 publications found

Genes affected

PAX6 (HGNC:8620): (paired box 6) This gene encodes paired box protein Pax-6, one of many human homologs of the Drosophila melanogaster gene prd. In addition to a conserved paired box domain, a hallmark feature of this gene family, the encoded protein also contains a homeobox domain. Both domains are known to bind DNA and function as regulators of gene transcription. Activity of this protein is key in the development of neural tissues, particularly the eye. This gene is regulated by multiple enhancers located up to hundreds of kilobases distant from this locus. Mutations in this gene or in the enhancer regions can cause ocular disorders such as aniridia and Peter's anomaly. Use of alternate promoters and alternative splicing results in multiple transcript variants encoding different isoforms. Interestingly, inclusion of a particular alternate coding exon has been shown to increase the length of the paired box domain and alter its DNA binding specificity. Consequently, isoforms that carry the shorter paired box domain regulate a different set of genes compared to the isoforms carrying the longer paired box domain. [provided by RefSeq, Mar 2019]

PAX6 Gene-Disease associations (from GenCC):

• aniridia 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, G2P, Labcorp Genetics (formerly Invitae)
• PAX6-related ocular dysgenesis

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• Peters anomaly

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: PanelApp Australia, G2P, Orphanet, Labcorp Genetics (formerly Invitae)
• coloboma, ocular, autosomal dominant

  Inheritance: AD Classification: STRONG Submitted by: PanelApp Australia
• diabetes mellitus

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• aniridia-cerebellar ataxia-intellectual disability syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• foveal hypoplasia-presenile cataract syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• isolated aniridia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• isolated optic nerve hypoplasia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• autosomal dominant keratitis

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

ACMG classification

Our verdict: Pathogenic. The variant received 11 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 11-31802719-AA-G is Pathogenic according to our data. Variant chr11-31802719-AA-G is described in ClinVar as Pathogenic. ClinVar VariationId is 430975.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001368894.2. 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
	PAX6	NM_001368894.2	MANE Select	c.125_126delTTinsC	p.Ile42ThrfsTer26	frameshift synonymous	Exon 5 of 14	NP_001355823.1
	PAX6	NM_001368910.2		c.368_369delTTinsC	p.Ile123ThrfsTer12	frameshift synonymous	Exon 6 of 14	NP_001355839.1
	PAX6	NM_001368911.2		c.128_129delTTinsC	p.Ile43ThrfsTer26	frameshift synonymous	Exon 2 of 10	NP_001355840.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PAX6	ENST00000640368.2	TSL:5 MANE Select	c.125_126delTTinsC	p.Ile42ThrfsTer26	frameshift synonymous	Exon 5 of 14	ENSP00000492024.1
	PAX6	ENST00000419022.6	TSL:1	c.125_126delTTinsC	p.Ile42ThrfsTer26	frameshift synonymous	Exon 5 of 14	ENSP00000404100.1
	PAX6	ENST00000638914.3	TSL:1	c.125_126delTTinsC	p.Ile42ThrfsTer26	frameshift synonymous	Exon 5 of 14	ENSP00000492315.2

Frequencies

GnomAD3 genomes Cov.: 31

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 31

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Aniridia 1 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		9.3
Mutation Taster		=0/200	disease causing (fs/PTC)

Splicing

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

Other links and lift over

dbSNP: rs1131692287; hg19: chr11-31824267;