Genetic Variant GIGYF2:c.268-14_268-6dupTTTTTTTTT (chr2-232756197-C-CTTTTTTTTT) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

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

The NM_001103146.3(GIGYF2):c.268-14_268-6dupTTTTTTTTT variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. There is a variant allele frequency bias in the population database for this variant (GnomAd4), which may indicate mosaicism or somatic mutations in the reference population data. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.00097 ( 0 hom., cov: 0)

Exomes 𝑓: 0.00089 ( 1 hom. )

Consequence

GIGYF2
NM_001103146.3 splice_region, intron

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.876

Publications

0 publications found

Variant links:

Genes affected

GIGYF2 (HGNC:11960): (GRB10 interacting GYF protein 2) This gene contains CAG trinucleotide repeats and encodes a protein containing several stretches of polyglutamine residues. The encoded protein may be involved in the regulation of tyrosine kinase receptor signaling. This gene is located in a chromosomal region that was genetically linked to Parkinson disease type 11, and mutations in this gene were thought to be causative for this disease. However, more recent studies in different populations have been unable to replicate this association. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2013]

GIGYF2 Gene-Disease associations (from GenCC):

Parkinson disease 11, autosomal dominant, susceptibility to
Inheritance: AD, Unknown Classification: MODERATE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp

GIGYF2 links:

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ACMG classification

Classification was made for transcript

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GIGYF2	NM_001103146.3 link	c.268-14_268-6dupTTTTTTTTT		splice_region_variant, intron_variant	Intron 5 of 28	ENST00000373563.9	NP_001096616.1	Q6Y7W6-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GIGYF2	ENST00000373563.9 link	c.268-26_268-25insTTTTTTTTT		intron_variant	Intron 5 of 28	1	NM_001103146.3	ENSP00000362664.5		Q6Y7W6-1

Frequencies

GnomAD3 genomes

AF:

0.000974

AC:

100

AN:

102678

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000500

Gnomad AMI

AF:

0.00411

Gnomad AMR

AF:

0.000687

Gnomad ASJ

AF:

0.00108

Gnomad EAS

AF:

0.000797

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000272

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00135

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.000892

AC:

542

AN:

607434

Hom.:

Cov.:

AF XY:

0.000931

AC XY:

300

AN XY:

322074

show subpopulations

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

African (AFR)

AF:

0.000741

AC:

AN:

14852

American (AMR)

AF:

0.00132

AC:

AN:

25760

Ashkenazi Jewish (ASJ)

AF:

0.000498

AC:

AN:

16058

East Asian (EAS)

AF:

0.00105

AC:

AN:

31412

South Asian (SAS)

AF:

0.00228

AC:

110

AN:

48176

European-Finnish (FIN)

AF:

0.000568

AC:

AN:

36992

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2266

European-Non Finnish (NFE)

AF:

0.000748

AC:

301

AN:

402204

Other (OTH)

AF:

0.000808

AC:

AN:

29714

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.367

Heterozygous variant carriers

108

135

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000974

AC:

100

AN:

102644

Hom.:

Cov.:

AF XY:

0.00109

AC XY:

AN XY:

47558

show subpopulations

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

African (AFR)

AF:

0.000499

AC:

AN:

26034

American (AMR)

AF:

0.000687

AC:

AN:

8738

Ashkenazi Jewish (ASJ)

AF:

0.00108

AC:

AN:

2790

East Asian (EAS)

AF:

0.000801

AC:

AN:

3746

South Asian (SAS)

AF:

0.00

AC:

AN:

2896

European-Finnish (FIN)

AF:

0.000272

AC:

AN:

3676

Middle Eastern (MID)

AF:

0.00

AC:

AN:

150

European-Non Finnish (NFE)

AF:

0.00135

AC:

AN:

52554

Other (OTH)

AF:

0.00

AC:

AN:

1330

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.371

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00975

Hom.:

144

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

-0.88

Splicing

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

Publications

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2-232756197-CTTTTTTTTTTTTTT-CTTTTTTTTTTTTTTTTTTTTTTT

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over