chr8-21693288-A-G

Position:

• chr8-21693288-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001495.5(GFRA2):​c.1385T>C​(p.Leu462Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L462Q) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: GFRA2 NM_001495.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.34

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GFRA2	NM_001495.5	c.1385T>C	p.Leu462Pro	missense_variant	9/9	ENST00000524240.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GFRA2	ENST00000524240.6	c.1385T>C	p.Leu462Pro	missense_variant	9/9	1	NM_001495.5	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.059	T
BayesDel_noAF	Benign	-0.32
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.17	T;T;.;.
Eigen	Uncertain	0.24
Eigen_PC	Benign	0.15
FATHMM_MKL	Uncertain	0.77	D
LIST_S2	Benign	0.74	.;T;T;T
M_CAP	Uncertain	0.10	D
MetaRNN	Uncertain	0.73	D;D;D;D
MetaSVM	Benign	-0.62	T
MutationAssessor	Benign	2.0	M;M;.;.
MutationTaster	Benign	7.8e-7	P;P;P;P
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-2.2	N;N;D;D
REVEL	Benign	0.21
Sift	Uncertain	0.0020	D;D;D;D
Sift4G	Uncertain	0.0050	D;D;D;D
Polyphen		1.0	D;D;D;.
Vest4		0.55
MutPred		0.41		Gain of disorder (P = 0.0052);Gain of disorder (P = 0.0052);.;.;
MVP		0.42
MPC		0.19
ClinPred		0.84	D
GERP RS		2.9
Varity_R		0.65
gMVP		0.85

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

LitVar

Other links and lift over

dbSNP: rs1128397; hg19: chr8-21550800;