chr20-25076038-C-T

Position:

• chr20-25076038-C-T

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_Strong BS2

The NM_014588.6(VSX1):​c.*223G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000156 in 613,488 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000098 (0 hom., cov: 33)
  • Exomes 𝑓: 0.00018 (0 hom.)
• Consequence: VSX1 NM_014588.6 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.00500

Genes affected

VSX1 (HGNC:12723): (visual system homeobox 1) The protein encoded by this gene contains a paired-like homeodomain and binds to the core of the locus control region of the red/green visual pigment gene cluster. The encoded protein may regulate expression of the cone opsin genes early in development. Mutations in this gene can cause posterior polymorphous corneal dystrophy and keratoconus. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -8 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BS2: High AC in GnomAd4 at 15 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
VSX1	NM_014588.6	c.*223G>A		3_prime_UTR_variant	5/5	ENST00000376709.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
VSX1	ENST00000376709.9	c.*223G>A		3_prime_UTR_variant	5/5	1	NM_014588.6	P1

Frequencies

GnomAD3 genomes AF: 0.000105 AC: 16 AN: 152234 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.000288

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00949

Gnomad NFE AF: 0.000176

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.000176 AC: 81 AN: 461136 Hom.: 0 Cov.: 5 AF XY: 0.000170 AC XY: 41 AN XY: 241544

Gnomad4 AFR exome AF: 0.000157

Gnomad4 AMR exome AF: 0.000333

Gnomad4 ASJ exome AF: 0.000447

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000221

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000205

Gnomad4 OTH exome AF: 0.000154

GnomAD4 genome AF: 0.0000985 AC: 15 AN: 152352 Hom.: 0 Cov.: 33 AF XY: 0.0000940 AC XY: 7 AN XY: 74490

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.000288

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000176

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000693 Hom.: 0

Bravo AF: 0.000144

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Polymorphous corneal dystrophy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	1.7
DANN	Benign	0.59

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs752720378; hg19: chr20-25056674;