rs863224777

Positions:

• chr10-43112892-A-C
• chr10-43112892-A-G
• chr10-43112892-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_020975.6(RET):​c.1688A>C​(p.Lys563Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: RET NM_020975.6 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 0.530

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]

RET (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.11045587).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RET	NM_020975.6	c.1688A>C	p.Lys563Thr	missense_variant	9/20	ENST00000355710.8	NP_066124.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RET	ENST00000355710.8	c.1688A>C	p.Lys563Thr	missense_variant	9/20	5	NM_020975.6	ENSP00000347942.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

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

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 27, 2022

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. ClinVar contains an entry for this variant (Variation ID: 216716). This variant has not been reported in the literature in individuals affected with RET-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces lysine, which is basic and polar, with threonine, which is neutral and polar, at codon 563 of the RET protein (p.Lys563Thr). -

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 27, 2024

The p.K563T variant (also known as c.1688A>C), located in coding exon 9 of the RET gene, results from an A to C substitution at nucleotide position 1688. The lysine at codon 563 is replaced by threonine, an amino acid with similar properties. This amino acid position is not well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. 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	Benign	0.17
BayesDel_addAF	Uncertain	0.090	D
BayesDel_noAF	Benign	-0.11
CADD	Benign	15
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.44	T;T;.
Eigen	Benign	-0.46
Eigen_PC	Benign	-0.38
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Uncertain	0.93	D;D;D
M_CAP	Uncertain	0.19	D
MetaRNN	Benign	0.11	T;T;T
MetaSVM	Uncertain	0.42	D
MutationAssessor	Benign	1.8	L;.;L
PrimateAI	Benign	0.35	T
PROVEAN	Benign	-0.64	N;N;N
REVEL	Benign	0.16
Sift	Benign	0.37	T;T;T
Sift4G	Benign	0.47	T;D;T
Polyphen		0.28	B;.;B
Vest4		0.49
MutPred		0.24		Loss of methylation at K563 (P = 0.0041);.;Loss of methylation at K563 (P = 0.0041);
MVP		0.62
MPC		0.40
ClinPred		0.14	T
GERP RS		0.28
Varity_R		0.11
gMVP		0.74

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: rs863224777; hg19: chr10-43608340;