15-23686685-C-T

Position:

• chr15-23686685-C-T

Variant summary

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

The NM_002487.3(NDN):​c.533G>A​(p.Arg178Lys) 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: NDN NM_002487.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.62

Genes affected

NDN (HGNC:7675): (necdin, MAGE family member) This intronless gene is located in the Prader-Willi syndrome deletion region. It is an imprinted gene and is expressed exclusively from the paternal allele. Studies in mouse suggest that the protein encoded by this gene may suppress growth in postmitotic neurons. [provided by RefSeq, Jul 2008]

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=0.15747663).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NDN	NM_002487.3	c.533G>A	p.Arg178Lys	missense_variant	1/1	ENST00000649030.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NDN	ENST00000649030.2	c.533G>A	p.Arg178Lys	missense_variant	1/1		NM_002487.3	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Prader-Willi syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genomic Research Center, Shahid Beheshti University of Medical Sciences

Mar 05, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.49
CADD	Benign	22
DANN	Uncertain	0.98
DEOGEN2	Benign	0.12	T;T
Eigen	Benign	-0.0042
Eigen_PC	Benign	0.048
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Benign	0.71	.;T
M_CAP	Benign	0.0043	T
MetaRNN	Benign	0.16	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.5	L;L
MutationTaster	Benign	0.96	N
PrimateAI	Uncertain	0.51	T
PROVEAN	Benign	-0.49	N;.
REVEL	Benign	0.14
Sift	Benign	0.91	T;.
Sift4G	Benign	1.0	T;.
Polyphen		0.62	P;P
Vest4		0.18
MutPred		0.51		Gain of ubiquitination at R178 (P = 0.0117);Gain of ubiquitination at R178 (P = 0.0117);
MVP		0.40
MPC		1.7
ClinPred		0.77	D
GERP RS		3.9
Varity_R		0.21
gMVP		0.49

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: rs1555376130; hg19: chr15-23931832;