rs1554819520

Variant names:

• chr10-43119549-T-C
• rs1554819520
• NM_020975.6:c.2411T>C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PM5 PP3_Moderate

The NM_020975.6(RET):​c.2411T>C​(p.Val804Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V804L) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 34)
• Consequence: RET NM_020975.6 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 8.01

Genes affected

RET (HGNC:9967): (ret proto-oncogene) This gene encodes a transmembrane receptor and member of the tyrosine protein kinase family of proteins. Binding of ligands such as GDNF (glial cell-line derived neurotrophic factor) and other related proteins to the encoded receptor stimulates receptor dimerization and activation of downstream signaling pathways that play a role in cell differentiation, growth, migration and survival. The encoded receptor is important in development of the nervous system, and the development of organs and tissues derived from the neural crest. This proto-oncogene can undergo oncogenic activation through both cytogenetic rearrangement and activating point mutations. Mutations in this gene are associated with Hirschsprung disease and central hypoventilation syndrome and have been identified in patients with renal agenesis. [provided by RefSeq, Sep 2017]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr10-43119548-G-C is described in Lovd as [Pathogenic].
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.92

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RET	NM_020975.6	c.2411T>C	p.Val804Ala	missense_variant	Exon 14 of 20	ENST00000355710.8	NP_066124.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RET	ENST00000355710.8	c.2411T>C	p.Val804Ala	missense_variant	Exon 14 of 20	5	NM_020975.6	ENSP00000347942.3

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 34

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Multiple endocrine neoplasia, type 2 Uncertain:1

Sep 19, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces valine, which is neutral and non-polar, with alanine, which is neutral and non-polar, at codon 804 of the RET protein (p.Val804Ala). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with RET-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). This variant disrupts the p.Val804 amino acid residue in RET. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 8797874, 9452077, 10876191, 25501606). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Hereditary cancer-predisposing syndrome Uncertain:1

Feb 27, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.V804A variant (also known as c.2411T>C), located in coding exon 14 of the RET gene, results from a T to C substitution at nucleotide position 2411. The valine at codon 804 is replaced by alanine, an amino acid with similar properties. Two other alterations at this position, p.V804M and p.V804L, have been designated as moderate risk mutations by the ATA (Wells SA et al. Thyroid. 2015 Jun;25:567-610). While this alteration has been classified as likely pathogenic in the literature, it has not been described in an individual with MEN2-related disease (Toledo RA et al. Endocr Relat Cancer. 2015 Feb;22:65-76; Margraf RL et al. Hum Mutat. 2022 Dec;43:1780-1794; Ambry internal data). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.80
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.33
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.82	D;.
Eigen	Uncertain	0.52
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.95	D;D
M_CAP	Uncertain	0.26	D
MetaRNN	Pathogenic	0.92	D;D
MetaSVM	Uncertain	0.66	D
MutationAssessor	Benign	1.7	L;L
PrimateAI	Pathogenic	0.84	D
PROVEAN	Uncertain	-3.5	D;D
REVEL	Pathogenic	0.81
Sift	Uncertain	0.0010	D;D
Sift4G	Pathogenic	0.0010	D;D
Polyphen		1.0	D;D
Vest4		0.95
MutPred		0.62		Loss of catalytic residue at V804 (P = 0.0955);Loss of catalytic residue at V804 (P = 0.0955);
MVP		0.91
MPC		0.86
ClinPred		0.99	D
GERP RS		5.4
Varity_R		0.92
gMVP		0.79

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: rs1554819520; hg19: chr10-43614997;