15-22812252-G-A

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PM2PP3PP5_Very_Strong

The NM_144599.5(NIPA1):c.316G>A(p.Gly106Arg) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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 Pathogenic (★★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Pathogenic in ClinVar.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

NIPA1
NM_144599.5 missense, splice_region

Scores

Splicing: ADA: 0.9928

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:15

Conservation

PhyloP100: 7.42

Publications

33 publications found

Variant links:

Genes affected

NIPA1 (HGNC:17043): (NIPA magnesium transporter 1) This gene encodes a magnesium transporter that associates with early endosomes and the cell surface in a variety of neuronal and epithelial cells. This protein may play a role in nervous system development and maintenance. Multiple transcript variants encoding different isoforms have been found for this gene. Mutations in this gene have been associated with autosomal dominant spastic paraplegia 6. [provided by RefSeq, Nov 2008]

NIPA1 Gene-Disease associations (from GenCC):

hereditary spastic paraplegia 6
Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae)

NIPA1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 11 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

PP5

Variant 15-22812252-G-A is Pathogenic according to our data. Variant chr15-22812252-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 2523.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_144599.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NIPA1	NM_144599.5	MANE Select	c.316G>A	p.Gly106Arg	missense splice_region	Exon 3 of 5	NP_653200.2
	NIPA1	NM_001142275.1		c.91G>A	p.Gly31Arg	missense splice_region	Exon 3 of 5	NP_001135747.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
NIPA1	ENST00000337435.9	TSL:1 MANE Select	c.316G>A	p.Gly106Arg	missense splice_region	Exon 3 of 5	ENSP00000337452.4
NIPA1	ENST00000437912.6	TSL:1	c.91G>A	p.Gly31Arg	missense splice_region	Exon 3 of 5	ENSP00000393962.2
NIPA1	ENST00000561183.5	TSL:1	c.91G>A	p.Gly31Arg	missense splice_region	Exon 3 of 5	ENSP00000453722.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1452338

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

723148

African (AFR)

AF:

0.00

AC:

AN:

33286

American (AMR)

AF:

0.00

AC:

AN:

44686

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26074

East Asian (EAS)

AF:

0.00

AC:

AN:

39634

South Asian (SAS)

AF:

0.00

AC:

AN:

86048

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53370

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5736

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1103436

Other (OTH)

AF:

0.00

AC:

AN:

60068

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000396

Hom.:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:15

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary spastic paraplegia 6

Pathogenic:7

Feb 01, 2005

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

Sep 03, 2019

Centre for Mendelian Genomics, University Medical Centre Ljubljana

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was classified as: Pathogenic. The following ACMG criteria were applied in classifying this variant: PS1,PS2,PS3,PM2,PM5,PP3,PP5.

Jun 01, 2022

Solve-RD Consortium

Significance:Likely pathogenic

Review Status:no assertion criteria provided

Collection Method:provider interpretation

Variant confirmed as disease-causing by referring clinical team

Paris Brain Institute, Inserm - ICM

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Neuberg Centre For Genomic Medicine, NCGM

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The missense variant p.G106R in NIPA1 (NM_144599.5) has been reported previously in affected patients (Hedera P et al; Morais S et al). The variant has been previously reported as de novo mutation. The variant has been submitted to ClinVar as Pathogenic. The p.G106R variant is novel (not in any individuals) in gnomAD Exomes and is novel (not in any individuals) in 1000 Genomes. The p.G106R missense variant is predicted to be damaging by both SIFT and PolyPhen2. The glycine residue at codon 106 of NIPA1 is conserved in all mammalian species. The nucleotide c.316 in NIPA1 is predicted conserved by GERP++ and PhyloP across 100 vertebrates. For these reasons, this variant has been classified as Pathogenic.

Aug 30, 2024

3billion

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The variant is not observed in the gnomAD v4.0.0 dataset. Predicted Consequence/Location: Missense changes are a common disease-causing mechanism. The same nucleotide change resulting in the same amino acid change has been previously reported as pathogenic/likely pathogenic with strong evidence (ClinVar ID: VCV000002523 /PMID: 15643603 /3billion dataset). The variant has been observed in multiple (>3) similarly affected unrelated individuals (PMID: 15711826, 16267846, 21599812, 22302102, 24075313). The variant has been previously reported as assumed (i.e. paternity and maternity not confirmed) de novo in at least one similarly affected unrelated individual (PMID: 24075313). Therefore, this variant is classified as Pathogenic according to the recommendation of ACMG/AMP guideline.

Dec 09, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 106 of the NIPA1 protein (p.Gly106Arg). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with hereditary spastic paraplegia (HSP) (PMID: 15643603, 15711826, 16267846, 21599812, 22302102, 24075313). In at least one individual the variant was observed to be de novo. It has also been observed to segregate with disease in related individuals. This variant is also known as G341A. ClinVar contains an entry for this variant (Variation ID: 2523). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. Experimental studies have shown that this missense change affects NIPA1 function (PMID: 17166836, 19091982, 19620182, 20816793, 24128679). For these reasons, this variant has been classified as Pathogenic.

not provided

Pathogenic:5

Dec 28, 2021

Mayo Clinic Laboratories, Mayo Clinic

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

PP1, PM2, PM6, PS1, PS3, PS4_moderate

Jan 12, 2017

Eurofins Ntd Llc (ga)

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

May 01, 2017

CeGaT Center for Human Genetics Tuebingen

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Jun 07, 2024

Athena Diagnostics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant has not been reported in large, multi-ethnic general populations. (http://gnomad.broadinstitute.org) This variant has been confirmed to occur de novo in multiple individuals with clinical features associated with this gene. This variant results in the same amino acid change as another variant considered to be pathogenic (c.316G>C). Assessment of experimental evidence suggests this variant results in abnormal protein function. (PMID 17166836, 19091982, 20816793)

Oct 23, 2020

Institute of Medical Genetics and Applied Genomics, University Hospital Tübingen

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Hereditary spastic paraplegia

Pathogenic:2

Mar 07, 2017

Unit for Genetic & Epidemiological Research on Neurological Disorders, Instituto de Investigação e Inovação em Saúde

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:research

Jan 03, 2017

Genome Diagnostics Laboratory, The Hospital for Sick Children

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Spastic paraplegia

Pathogenic:1

NIHR Bioresource Rare Diseases, University of Cambridge

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:research

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.98

BayesDel_noAF

Pathogenic

0.57

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.54

LIST_S2

Uncertain

0.93

MetaRNN

Pathogenic

0.86

PhyloP100

7.4

PROVEAN

Benign

-1.9

Sift

Benign

0.035

Sift4G

Benign

0.065

Vest4

0.99

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.7

gMVP

0.98

Mutation Taster

=37/63

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

0.99

dbscSNV1_RF

Pathogenic

0.93

SpliceAI score (max)

0.95

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.95

Position offset: 1

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over