NM_144599.5:c.134C>T

Variant names:

• chr15-22786790-C-T
• NM_144599.5:c.134C>T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PM5

The NM_144599.5(NIPA1):​c.134C>T​(p.Thr45Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000865 in 1,155,566 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T45R) has been classified as Pathogenic.

• Frequency:
  • Genomes: not found (cov: 29)
  • Exomes 𝑓: 8.7e-7 (0 hom.)
• Consequence: NIPA1 NM_144599.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.08

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr15-22786790-C-G is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NIPA1	NM_144599.5	c.134C>T	p.Thr45Met	missense_variant	Exon 1 of 5	ENST00000337435.9	NP_653200.2
NIPA1	NM_001142275.1	c.-48+542C>T		intron_variant	Intron 1 of 4		NP_001135747.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NIPA1	ENST00000337435.9	c.134C>T	p.Thr45Met	missense_variant	Exon 1 of 5	1	NM_144599.5	ENSP00000337452.4

Frequencies

GnomAD3 genomes Cov.: 29

GnomAD4 exome AF: 8.65e-7 AC: 1 AN: 1155566 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 573050

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: 0.0000158

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 29

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.91
BayesDel_noAF	Pathogenic	0.36
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.77	D
LIST_S2	Uncertain	0.87	D
MetaRNN	Uncertain	0.56	D
PROVEAN	Uncertain	-2.4	N
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0020	D
Vest4		0.48
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8
gMVP		0.94

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr15-23086278;