chr15-29268880-T-C

Position:

• chr15-29268880-T-C

Variant summary

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

The NM_138704.4(NSMCE3):​c.826A>G​(p.Lys276Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000171 in 1,461,894 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000017 (0 hom.)
• Consequence: NSMCE3 NM_138704.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.556

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=0.17477545).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NSMCE3	NM_138704.4	c.826A>G	p.Lys276Glu	missense_variant	1/1	ENST00000332303.6
ENTREP2	NM_015307.2	c.277-16402A>G		intron_variant		ENST00000261275.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NSMCE3	ENST00000332303.6	c.826A>G	p.Lys276Glu	missense_variant	1/1		NM_138704.4	P1
ENTREP2	ENST00000261275.5	c.277-16402A>G		intron_variant		5	NM_015307.2	P1
ENTREP2	ENST00000560082.1	c.-12-16402A>G		intron_variant		4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.0000171 AC: 25 AN: 1461894 Hom.: 0 Cov.: 31 AF XY: 0.0000193 AC XY: 14 AN XY: 727248

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

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: 0.0000207

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

EpiCase AF: 0.00

EpiControl AF: 0.0000593

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

Jun 20, 2022

This sequence change replaces lysine, which is basic and polar, with glutamic acid, which is acidic and polar, at codon 276 of the NSMCE3 protein (p.Lys276Glu). 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. 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: "Benign"; Align-GVGD: "Class C0"). 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	Pathogenic	0.58
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.44
CADD	Benign	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.0074	T
Eigen	Benign	-0.21
Eigen_PC	Benign	-0.085
FATHMM_MKL	Benign	0.57	D
LIST_S2	Benign	0.33	T
M_CAP	Benign	0.0065	T
MetaRNN	Benign	0.17	T
MetaSVM	Benign	-0.87	T
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.64	T
PROVEAN	Benign	-1.6	N
REVEL	Benign	0.069
Sift	Uncertain	0.016	D
Sift4G	Benign	0.12	T
Polyphen		0.23	B
Vest4		0.36
MVP		0.26
MPC		0.62
ClinPred		0.75	D
GERP RS		3.9
Varity_R		0.65
gMVP		0.42

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: rs987175109; hg19: chr15-29561084;