rs1554818536

Positions:

• chr10-43111345-A-G
• chr10-43111345-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1 PM2

The NM_020975.6(RET):​c.1402A>G​(p.Asn468Asp) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 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. N468S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 34)
• Consequence: RET NM_020975.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.37

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 Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a glycosylation_site N-linked (GlcNAc...) asparagine (size 0) in uniprot entity RET_HUMAN
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RET	NM_020975.6	c.1402A>G	p.Asn468Asp	missense_variant	7/20	ENST00000355710.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RET	ENST00000355710.8	c.1402A>G	p.Asn468Asp	missense_variant	7/20	5	NM_020975.6	P4

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 58

GnomAD4 genome Cov.: 34

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Multiple endocrine neoplasia, type 2 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 10, 2019

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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with RET-related conditions. ClinVar contains an entry for this variant (Variation ID: 477315). This variant is not present in population databases (ExAC no frequency). This sequence change replaces asparagine with aspartic acid at codon 468 of the RET protein (p.Asn468Asp). The asparagine residue is highly conserved and there is a small physicochemical difference between asparagine and aspartic acid. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.26
BayesDel_addAF	Benign	-0.0091	T
BayesDel_noAF	Benign	-0.25
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.73	D;.
Eigen	Uncertain	0.21
Eigen_PC	Benign	0.14
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.83	T;T
M_CAP	Uncertain	0.088	D
MetaRNN	Uncertain	0.73	D;D
MetaSVM	Uncertain	0.12	D
MutationAssessor	Uncertain	2.5	M;M
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.48	T
PROVEAN	Uncertain	-2.6	D;D
REVEL	Uncertain	0.38
Sift	Uncertain	0.012	D;D
Sift4G	Uncertain	0.032	D;D
Polyphen		0.90	P;P
Vest4		0.67
MutPred		0.47		Gain of ubiquitination at K471 (P = 0.041);Gain of ubiquitination at K471 (P = 0.041);
MVP		0.89
MPC		0.41
ClinPred		0.95	D
GERP RS		4.6
Varity_R		0.75
gMVP		0.75

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: rs1554818536; hg19: chr10-43606793;