rs1673617254

Variant names:

• chr1-155610440-C-T
• rs1673617254
• NM_018116.4:c.100C>T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM2 PP5_Moderate BP4

The NM_001350776.1(MSTO1):​c.-188C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000556 in 719,148 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency:
  • Genomes: not found (cov: 21)
  • Exomes 𝑓: 0.0000056 (0 hom.)
• Consequence: MSTO1 NM_001350776.1 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: -0.668

Genes affected

MSTO1 (HGNC:29678): (misato mitochondrial distribution and morphology regulator 1) Involved in mitochondrion distribution. Located in cytosol and mitochondrial outer membrane. [provided by Alliance of Genome Resources, Apr 2022]

LOC105371452 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 1-155610440-C-T is Pathogenic according to our data. Variant chr1-155610440-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 2571791.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP4: Computational evidence support a benign effect (BayesDel_addAF=-0.048192). . Strength limited to SUPPORTING due to the PP5.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MSTO1	NM_018116.4	c.100C>T	p.Arg34*	stop_gained	Exon 2 of 14	ENST00000245564.8	NP_060586.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MSTO1	ENST00000245564.8	c.100C>T	p.Arg34*	stop_gained	Exon 2 of 14	1	NM_018116.4	ENSP00000245564.3
MSTO1	ENST00000368341.8	c.100C>T	p.Arg34*	stop_gained	Exon 2 of 13	2		ENSP00000357325.4

Frequencies

GnomAD3 genomes Cov.: 21

GnomAD4 exome AF: 0.00000556 AC: 4 AN: 719148 Hom.: 0 Cov.: 9 AF XY: 0.00000810 AC XY: 3 AN XY: 370248

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000933

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: 0.00000205

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 21

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Pathogenic:1

Apr 09, 2025

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; Not observed at significant frequency in large population cohorts (gnomAD); Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.048	T
BayesDel_noAF	Benign	-0.31
CADD	Pathogenic	26
DANN	Benign	0.97
Eigen	Benign	-0.46
Eigen_PC	Benign	-0.93
FATHMM_MKL	Benign	0.012	N
Vest4		0.17
GERP RS		-5.9

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.10		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

Other links and lift over

dbSNP: rs1673617254; hg19: chr1-155580231;