Genetic Variant MTOR:p.Thr221Thr (chr1-11256034-G-C) – ACMG Classification: Benign (-21 pts)

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_004958.4(MTOR):c.663C>G(p.Thr221Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000601 in 1,614,102 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0018 ( 2 hom., cov: 32)

Exomes 𝑓: 0.00047 ( 4 hom. )

Consequence

MTOR
NM_004958.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:9

Conservation

PhyloP100: -0.407

Publications

3 publications found

Variant links:

Genes affected

MTOR (HGNC:3942): (mechanistic target of rapamycin kinase) The protein encoded by this gene belongs to a family of phosphatidylinositol kinase-related kinases. These kinases mediate cellular responses to stresses such as DNA damage and nutrient deprivation. This kinase is a component of two distinct complexes, mTORC1, which controls protein synthesis, cell growth and proliferation, and mTORC2, which is a regulator of the actin cytoskeleton, and promotes cell survival and cell cycle progression. This protein acts as the target for the cell-cycle arrest and immunosuppressive effects of the FKBP12-rapamycin complex. Inhibitors of mTOR are used in organ transplants as immunosuppressants, and are being evaluated for their therapeutic potential in SARS-CoV-2 infections. Mutations in this gene are associated with Smith-Kingsmore syndrome and somatic focal cortical dysplasia type II. The ANGPTL7 gene is located in an intron of this gene. [provided by RefSeq, Aug 2020]

MTOR Gene-Disease associations (from GenCC):

macrocephaly-intellectual disability-neurodevelopmental disorder-small thorax syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Illumina, Orphanet, Labcorp Genetics (formerly Invitae), G2P
overgrowth syndrome and/or cerebral malformations due to abnormalities in MTOR pathway genes
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen

MTOR links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.56).

BP6

Variant 1-11256034-G-C is Benign according to our data. Variant chr1-11256034-G-C is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 414899.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.407 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00185 (281/152222) while in subpopulation AFR AF = 0.00542 (225/41542). AF 95% confidence interval is 0.00484. There are 2 homozygotes in GnomAd4. There are 129 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 281 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004958.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
MTOR	NM_004958.4	MANE Select	c.663C>G	p.Thr221Thr	synonymous	Exon 5 of 58	NP_004949.1
MTOR	NM_001386500.1		c.663C>G	p.Thr221Thr	synonymous	Exon 5 of 58	NP_001373429.1
MTOR	NM_001386501.1		c.-477C>G		5_prime_UTR	Exon 5 of 57	NP_001373430.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
MTOR	ENST00000361445.9	TSL:1 MANE Select	c.663C>G	p.Thr221Thr	synonymous	Exon 5 of 58	ENSP00000354558.4
MTOR	ENST00000934315.1		c.663C>G	p.Thr221Thr	synonymous	Exon 5 of 58	ENSP00000604374.1
MTOR	ENST00000934312.1		c.663C>G	p.Thr221Thr	synonymous	Exon 5 of 58	ENSP00000604371.1

Frequencies

GnomAD3 genomes

AF:

0.00182

AC:

277

AN:

152104

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00534

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00105

Gnomad ASJ

AF:

0.00952

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.000479

GnomAD2 exomes

AF:

0.00103

AC:

259

AN:

251340

AF XY:

0.000817

show subpopulations

Gnomad AFR exome

AF:

0.00511

Gnomad AMR exome

AF:

0.000463

Gnomad ASJ exome

AF:

0.0131

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000167

Gnomad OTH exome

AF:

0.00114

GnomAD4 exome

AF:

0.000471

AC:

689

AN:

1461880

Hom.:

Cov.:

AF XY:

0.000440

AC XY:

320

AN XY:

727236

show subpopulations

African (AFR)

AF:

0.00606

AC:

203

AN:

33478

American (AMR)

AF:

0.000604

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.0114

AC:

297

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000232

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00104

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.0000558

AC:

AN:

1112010

Other (OTH)

AF:

0.00152

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.471

Heterozygous variant carriers

126

168

210

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00185

AC:

281

AN:

152222

Hom.:

Cov.:

AF XY:

0.00173

AC XY:

129

AN XY:

74412

show subpopulations

African (AFR)

AF:

0.00542

AC:

225

AN:

41542

American (AMR)

AF:

0.00105

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00952

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5170

South Asian (SAS)

AF:

0.00

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10598

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000882

AC:

AN:

68026

Other (OTH)

AF:

0.000474

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00187

Hom.:

Bravo

AF:

0.00209

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.000218

EpiControl

AF:

0.000474

ClinVar

ClinVar submissions as Germline

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (7)

MTOR-related disorder (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.56

CADD

Benign

7.5

(source)

DANN

Benign

0.51

PhyloP100

-0.41

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Mutation Taster

=89/11

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over