Variant chrX-74739500-T-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1PP3_Strong

The NM_001008537.3(NEXMIF):c.4458-2A>G variant causes a splice acceptor change. The variant allele was found at a frequency of 0.00000515 in 1,164,695 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000018 ( 0 hom., 0 hem., cov: 21)

Exomes 𝑓: 0.0000038 ( 0 hom. 0 hem. )

Consequence

NEXMIF
NM_001008537.3 splice_acceptor

Scores

Splicing: ADA: 1.000

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 4.50

Variant links:

Genes affected

NEXMIF (HGNC:29433): (neurite extension and migration factor) An inversion on the X chromosome which disrupts this gene and a G-protein coupled purinergic receptor gene located in the pseudoautosomal region of the X chromosome has been linked to X linked cognitive disability.[provided by RefSeq, Mar 2009]

NEXMIF links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 ACMG points.

PVS1

Splicing +-2 bp (donor or acceptor) variant, LoF is a know mechanism of disease,

PP3

Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NEXMIF	NM_001008537.3 linkuse as main transcript	c.4458-2A>G		splice_acceptor_variant		ENST00000055682.12

Ensembl

Gene	Transcript	HGVSc	Effect	#exon/exons	TSL	MANE	Appris
NEXMIF	ENST00000055682.12 linkuse as main transcript	c.4458-2A>G	splice_acceptor_variant		1	NM_001008537.3	P1
NEXMIF	ENST00000616200.2 linkuse as main transcript	c.4458-2A>G	splice_acceptor_variant		1		P1
NEXMIF	ENST00000642681.2 linkuse as main transcript	c.*596A>G	3_prime_UTR_variant	3/3

Frequencies

GnomAD3 genomes

AF:

0.0000184

AC:

AN:

108804

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

31114

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000382

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000379

AC:

AN:

1055891

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

325419

show subpopulations

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:

0.00000494

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000184

AC:

AN:

108804

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

31114

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000382

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ExAC

AF:

0.00000825

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jan 29, 2021	Canonical splice site variant predicted to result in an in-frame deletion of exon 4 which is the last exon; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 27358180) -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jun 18, 2023	This variant has not been reported in the literature in individuals affected with NEXMIF-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change affects an acceptor splice site in intron 3 of the NEXMIF gene. While this variant is not anticipated to result in nonsense mediated decay, it likely alters RNA splicing and results in a disrupted protein product. ClinVar contains an entry for this variant (Variation ID: 1302372). 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. Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.63

BayesDel_noAF

Uncertain

0.020

CADD

Pathogenic

DANN

Uncertain

0.99

FATHMM_MKL

Uncertain

0.92

MutationTaster

Benign

1.0

D;D

GERP RS

5.5

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.94

SpliceAI score (max)

0.88

Details are displayed if max score is > 0.2

DS_AL_spliceai

0.88

Position offset: -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