5-6631974-G-A

Position:

chr5-6631974-G-A

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 2P and 10B. PM2BP4_StrongBP6BP7BS1

The NM_017755.6(NSUN2):c.258C>T(p.His86His) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000456 in 1,606,798 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00041 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00046 ( 1 hom. )

Consequence

NSUN2
NM_017755.6 synonymous

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:6

Conservation

PhyloP100: 0.0260

Variant links:

Genes affected

NSUN2 (HGNC:25994): (NOP2/Sun RNA methyltransferase 2) This gene encodes a methyltransferase that catalyzes the methylation of cytosine to 5-methylcytosine (m5C) at position 34 of intron-containing tRNA(Leu)(CAA) precursors. This modification is necessary to stabilize the anticodon-codon pairing and correctly translate the mRNA. Alternatively spliced transcript variants encoding different isoforms have been noted for this gene.[provided by RefSeq, Mar 2011]

NSUN2 links:

NSUN2 (HGNC:):

NSUN2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.64).

BP6

Variant 5-6631974-G-A is Benign according to our data. Variant chr5-6631974-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 354061.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=5, Uncertain_significance=1}.

BP7

Synonymous conserved (PhyloP=0.026 with no splicing effect.

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.000414 (63/152252) while in subpopulation AMR AF= 0.00144 (22/15300). AF 95% confidence interval is 0.000973. There are 0 homozygotes in gnomad4. There are 38 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NSUN2	NM_017755.6 linkuse as main transcript	c.258C>T	p.His86His	synonymous_variant	3/19	ENST00000264670.11	NP_060225.4	Q08J23-1
NSUN2	NM_001193455.2 linkuse as main transcript	c.254+625C>T		intron_variant			NP_001180384.1	Q08J23-2
NSUN2	NR_037947.2 linkuse as main transcript	n.323C>T		non_coding_transcript_exon_variant	3/18

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
NSUN2	ENST00000264670.11 linkuse as main transcript	c.258C>T	p.His86His	synonymous_variant	3/19	1	NM_017755.6	ENSP00000264670.6	Q08J23-1
NSUN2	ENST00000506139.5 linkuse as main transcript	c.254+625C>T		intron_variant		2		ENSP00000420957.1	Q08J23-2
NSUN2	ENST00000504374.5 linkuse as main transcript	n.258C>T		non_coding_transcript_exon_variant	3/18	2		ENSP00000421783.1	A0A140T9Y7

Frequencies

GnomAD3 genomes

AF:

0.000414

AC:

AN:

152134

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000725

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00144

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000944

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000485

Gnomad OTH

AF:

0.00192

GnomAD3 exomes

AF:

0.000462

AC:

115

AN:

248792

Hom.:

AF XY:

0.000417

AC XY:

AN XY:

134326

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.00127

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000110

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000932

Gnomad NFE exome

AF:

0.000539

Gnomad OTH exome

AF:

0.000657

GnomAD4 exome

AF:

0.000460

AC:

669

AN:

1454546

Hom.:

Cov.:

AF XY:

0.000430

AC XY:

311

AN XY:

723866

show subpopulations

Gnomad4 AFR exome

AF:

0.0000902

Gnomad4 AMR exome

AF:

0.00124

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000376

Gnomad4 NFE exome

AF:

0.000526

Gnomad4 OTH exome

AF:

0.000416

GnomAD4 genome

AF:

0.000414

AC:

AN:

152252

Hom.:

Cov.:

AF XY:

0.000510

AC XY:

AN XY:

74446

show subpopulations

Gnomad4 AFR

AF:

0.0000722

Gnomad4 AMR

AF:

0.00144

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000944

Gnomad4 NFE

AF:

0.000485

Gnomad4 OTH

AF:

0.00190

Alfa

AF:

0.000428

Hom.:

Bravo

AF:

0.000589

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.000600

EpiControl

AF:

0.000889

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:6

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Benign:3

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 25, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Oct 01, 2023	NSUN2: BP4, BP7 -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jan 07, 2019	- -

Intellectual disability, autosomal recessive 5

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Apr 18, 2016

- -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

May 12, 2017

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

NSUN2-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

May 28, 2019

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.64

CADD

Benign

2.8

DANN

Benign

0.84

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over