Genetic Variant MSTO1:p.Gln226* (chr1-155612098-C-T) – ACMG Classification: Pathogenic (13 pts)

Variant summary

Our verdict is Pathogenic. Variant got 13 ACMG points: 13P and 0B. PVS1PM2PP3PP5_Moderate

The NM_018116.4(MSTO1):c.676C>T(p.Gln226*) variant causes a stop gained, splice region change. 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 Likely pathogenic (★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: not found (cov: 30)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

MSTO1
NM_018116.4 stop_gained, splice_region

Scores

Splicing: ADA: 0.9969

Clinical Significance

Likely pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 6.53

Variant links:

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]

MSTO1 links:

LOC105371452 (HGNC:):

LOC105371452 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 13 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP3

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

PP5

Variant 1-155612098-C-T is Pathogenic according to our data. Variant chr1-155612098-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 522862.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr1-155612098-C-T is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MSTO1	NM_018116.4 link	c.676C>T	p.Gln226*	stop_gained, splice_region_variant	Exon 7 of 14	ENST00000245564.8	NP_060586.2	Q9BUK6-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MSTO1	ENST00000245564.8 link	c.676C>T	p.Gln226*	stop_gained, splice_region_variant	Exon 7 of 14	1	NM_018116.4	ENSP00000245564.3		Q9BUK6-1
MSTO1	ENST00000368341.8 link	c.571C>T	p.Gln191*	stop_gained, splice_region_variant	Exon 6 of 13	2		ENSP00000357325.4		Q9BUK6-7

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000401

AC:

AN:

249656

Hom.:

AF XY:

0.00000739

AC XY:

AN XY:

135378

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000886

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

6.85e-7

AC:

AN:

1460772

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726712

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:

9.00e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Mitochondrial myopathy-cerebellar ataxia-pigmentary retinopathy syndrome

Pathogenic:1

Dec 14, 2017

Undiagnosed Diseases Network, NIH

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.676C>T (p.Gln226Ter) variant in MSTO1 is a nonsense variant. This variant was identified as a compound heterozygote with c.971C>T (p.Thr324Ile). The variant is seen in 1 individual in gnomAD as a heterozygote. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.58

BayesDel_noAF

Pathogenic

0.60

CADD

Pathogenic

DANN

Uncertain

1.0

Eigen

Pathogenic

0.91

Eigen_PC

Pathogenic

0.69

FATHMM_MKL

Uncertain

0.96

Vest4

0.48, 0.45

GERP RS

3.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.95

SpliceAI score (max)

0.80

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.80

Position offset: -2

DS_DL_spliceai

0.71

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