Genetic Variant NGRN:p.Ala251Val (chr15-90271664-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001033088.3(NGRN):c.752C>T(p.Ala251Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000192 in 1,614,004 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000021 ( 0 hom. )

Consequence

NGRN
NM_001033088.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.930

Variant links:

Genes affected

NGRN (HGNC:18077): (neugrin, neurite outgrowth associated) Enables rRNA binding activity. Involved in positive regulation of mitochondrial translation. Located in several cellular components, including intercellular bridge; mitotic spindle; and nuclear body. [provided by Alliance of Genome Resources, Apr 2022]

NGRN links:

ENSG00000275674 (HGNC:):

ENSG00000275674 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.032957286).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NGRN	NM_001033088.3 link	c.752C>T	p.Ala251Val	missense_variant	Exon 3 of 3	ENST00000379095.5	NP_001028260.2	Q9NPE2-2
NGRN	NR_028052.1 link	n.1213C>T		non_coding_transcript_exon_variant	Exon 2 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
NGRN	ENST00000379095.5 link	c.752C>T	p.Ala251Val	missense_variant	Exon 3 of 3	1	NM_001033088.3	ENSP00000368389.4	Q9NPE2-2
ENSG00000275674	ENST00000622269.1 link	c.80+5266C>T		intron_variant	Intron 1 of 3	3		ENSP00000479373.1	A0A087WVE0
ENSG00000261147	ENST00000561573.1 link	n.*2376C>T		non_coding_transcript_exon_variant	Exon 13 of 13	2		ENSP00000456615.1	H3BSA7
ENSG00000261147	ENST00000561573.1 link	n.*2376C>T		3_prime_UTR_variant	Exon 13 of 13	2		ENSP00000456615.1	H3BSA7

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152130

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000438

AC:

AN:

251270

Hom.:

AF XY:

0.0000294

AC XY:

AN XY:

135860

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000163

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000205

AC:

AN:

1461874

Hom.:

Cov.:

AF XY:

0.0000220

AC XY:

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000134

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000139

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000899

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152130

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74298

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000189

ExAC

AF:

0.0000330

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 16, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.752C>T (p.A251V) alteration is located in exon 3 (coding exon 3) of the NGRN gene. This alteration results from a C to T substitution at nucleotide position 752, causing the alanine (A) at amino acid position 251 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.068

BayesDel_addAF

Benign

-0.58

BayesDel_noAF

Benign

-0.82

CADD

Benign

0.84

DANN

Benign

0.60

DEOGEN2

Benign

0.0067

Eigen

Benign

-1.6

Eigen_PC

Benign

-1.6

FATHMM_MKL

Benign

0.062

LIST_S2

Benign

0.36

M_CAP

Benign

0.0015

MetaRNN

Benign

0.033

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.69

PrimateAI

Benign

0.23

PROVEAN

Benign

-1.0

REVEL

Benign

0.023

Sift

Benign

0.33

Sift4G

Benign

0.29

Polyphen

0.0020

Vest4

0.021

MutPred

0.46

Loss of helix (P = 0.0558);

MVP

0.030

MPC

0.084

ClinPred

0.016

GERP RS

-0.80

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.073

gMVP

0.063

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

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