chr15-29268804-G-A

Position:

• chr15-29268804-G-A

Variant summary

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

The NM_138704.4(NSMCE3):​c.902C>T​(p.Ala301Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000117 in 1,457,206 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000012 (0 hom.)
• Consequence: NSMCE3 NM_138704.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.20

Genes affected

NSMCE3 (HGNC:7677): (NSE3 homolog, SMC5-SMC6 complex component) The protein encoded by this gene is part of the SMC5-6 chromatin reorganizing complex and is a member of the MAGE superfamily. This is an intronless gene. [provided by RefSeq, May 2011]

ENTREP2 (HGNC:29075): (endosomal transmembrane epsin interactor 2) Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

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=0.09507528).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NSMCE3	NM_138704.4	c.902C>T	p.Ala301Val	missense_variant	1/1	ENST00000332303.6
ENTREP2	NM_015307.2	c.277-16326C>T		intron_variant		ENST00000261275.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NSMCE3	ENST00000332303.6	c.902C>T	p.Ala301Val	missense_variant	1/1		NM_138704.4	P1
ENTREP2	ENST00000261275.5	c.277-16326C>T		intron_variant		5	NM_015307.2	P1
ENTREP2	ENST00000560082.1	c.-12-16326C>T		intron_variant		4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.0000117 AC: 17 AN: 1457206 Hom.: 0 Cov.: 30 AF XY: 0.00000552 AC XY: 4 AN XY: 724074

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000153

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 12, 2022

This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 301 of the NSMCE3 protein (p.Ala301Val). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with NSMCE3-related conditions. ClinVar contains an entry for this variant (Variation ID: 1462904). 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. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.081
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	18
DANN	Benign	0.97
DEOGEN2	Benign	0.10	T
Eigen	Benign	-0.75
Eigen_PC	Benign	-0.79
FATHMM_MKL	Benign	0.18	N
LIST_S2	Benign	0.39	T
M_CAP	Benign	0.0027	T
MetaRNN	Benign	0.095	T
MetaSVM	Benign	-0.96	T
MutationTaster	Benign	1.0	N;N
PrimateAI	Uncertain	0.54	T
PROVEAN	Benign	-1.6	N
REVEL	Benign	0.036
Sift	Benign	0.060	T
Sift4G	Benign	0.085	T
Polyphen		0.024	B
Vest4		0.26
MutPred		0.19		Loss of glycosylation at P300 (P = 0.0727);
MVP		0.12
MPC		0.44
ClinPred		0.16	T
GERP RS		1.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.058
gMVP		0.29

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: rs1163030015; hg19: chr15-29561008;