Genetic Variant GFRA2:c.795-12856G>T (chr8-21718897-C-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001495.5(GFRA2):c.795-12856G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000198 in 151,684 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 30)

Consequence

GFRA2
NM_001495.5 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.00700

Publications

3 publications found

Variant links:

Genes affected

GFRA2 (HGNC:4244): (GDNF family receptor alpha 2) Glial cell line-derived neurotrophic factor (GDNF) and neurturin (NTN) are two structurally related, potent neurotrophic factors that play key roles in the control of neuron survival and differentiation. The protein encoded by this gene is a member of the GDNF receptor family. It is a glycosylphosphatidylinositol(GPI)-linked cell surface receptor for both GDNF and NTN, and mediates activation of the RET tyrosine kinase receptor. This encoded protein acts preferentially as a receptor for NTN compared to its other family member, GDNF family receptor alpha 1. This gene is a candidate gene for RET-associated diseases. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2009]

GFRA2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.9).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001495.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
GFRA2	NM_001495.5	MANE Select	c.795-12856G>T	intron	N/A	NP_001486.4
GFRA2	NM_001165038.2		c.480-12856G>T	intron	N/A	NP_001158510.1
GFRA2	NM_001165039.2		c.396-12856G>T	intron	N/A	NP_001158511.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
GFRA2	ENST00000524240.6	TSL:1 MANE Select	c.795-12856G>T	intron	N/A	ENSP00000428518.1
GFRA2	ENST00000517892.5	TSL:1	c.480-12856G>T	intron	N/A	ENSP00000429979.1
GFRA2	ENST00000518077.5	TSL:1	c.396-12856G>T	intron	N/A	ENSP00000429206.1

Frequencies

GnomAD3 genomes

AF:

0.0000198

AC:

AN:

151566

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000657

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000295

Gnomad OTH

AF:

0.00

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

GnomAD4 genome

AF:

0.0000198

AC:

AN:

151684

Hom.:

Cov.:

AF XY:

0.0000270

AC XY:

AN XY:

74076

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41364

American (AMR)

AF:

0.0000656

AC:

AN:

15242

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5112

South Asian (SAS)

AF:

0.00

AC:

AN:

4792

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10502

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000295

AC:

AN:

67896

Other (OTH)

AF:

0.00

AC:

AN:

2104

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.608

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.90

CADD

Benign

3.5

(source)

DANN

Benign

0.69

PhyloP100

0.0070

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over