1-11117039-C-A

Variant names:

• chr1-11117039-C-A
• rs878855328
• NM_004958.4:c.6981G>T

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PS1_Very_Strong PM2 PP3_Moderate

The NM_004958.4(MTOR):​c.6981G>T​(p.Met2327Ile) variant causes a missense 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Pathogenic in ClinVar. The gene MTOR is included in the ClinGen Criteria Specification Registry.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MTOR NM_004958.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.35
• Publications: 0 publications found

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: Orphanet, G2P, Labcorp Genetics (formerly Invitae), Illumina
• overgrowth syndrome and/or cerebral malformations due to abnormalities in MTOR pathway genes

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen

ACMG classification

Specifications for MTOR are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PS1: Transcript NM_004958.4 (MTOR) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar.
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.923

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MTOR	NM_004958.4	MANE Select	c.6981G>T	p.Met2327Ile	missense	Exon 50 of 58	NP_004949.1	P42345
	MTOR	NM_001386500.1		c.6981G>T	p.Met2327Ile	missense	Exon 50 of 58	NP_001373429.1	P42345
	MTOR	NM_001386501.1		c.5733G>T	p.Met1911Ile	missense	Exon 49 of 57	NP_001373430.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MTOR	ENST00000361445.9	TSL:1 MANE Select	c.6981G>T	p.Met2327Ile	missense	Exon 50 of 58	ENSP00000354558.4	P42345
	MTOR	ENST00000934315.1		c.7035G>T	p.Met2345Ile	missense	Exon 50 of 58	ENSP00000604374.1
	MTOR	ENST00000934312.1		c.7002G>T	p.Met2334Ile	missense	Exon 50 of 58	ENSP00000604371.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.33
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.47	T
Eigen	Pathogenic	0.92
Eigen_PC	Pathogenic	0.88
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.30	D
MetaRNN	Pathogenic	0.92	D
MetaSVM	Uncertain	0.47	D
MutationAssessor	Uncertain	2.9	M
PhyloP100		7.3
PrimateAI	Pathogenic	0.92	D
PROVEAN	Uncertain	-4.0	D
REVEL	Pathogenic	0.84
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0020	D
Polyphen		1.0	D
Vest4		0.94
MutPred		0.77		Loss of phosphorylation at Y2332 (P = 0.1632)
MVP		0.96
MPC		2.6
ClinPred		0.99	D
GERP RS		5.7
Varity_R		0.93
gMVP		1.0
Mutation Taster		=3/97	disease causing

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

Other links and lift over

dbSNP: rs878855328; hg19: chr1-11177096; COSMIC: COSV63869693; COSMIC: COSV63869693;