17-80754121-C-T

Position:

• chr17-80754121-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_020761.3(RPTOR):​c.766C>T​(p.Pro256Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 31)
• Consequence: RPTOR NM_020761.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.84

Genes affected

RPTOR (HGNC:30287): (regulatory associated protein of MTOR complex 1) This gene encodes a component of a signaling pathway that regulates cell growth in response to nutrient and insulin levels. The encoded protein forms a stoichiometric complex with the mTOR kinase, and also associates with eukaryotic initiation factor 4E-binding protein-1 and ribosomal protein S6 kinase. The protein positively regulates the downstream effector ribosomal protein S6 kinase, and negatively regulates the mTOR kinase. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2009]

RPTOR (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RPTOR	NM_020761.3	c.766C>T	p.Pro256Ser	missense_variant	6/34	ENST00000306801.8	NP_065812.1
RPTOR	NM_001163034.2	c.766C>T	p.Pro256Ser	missense_variant	6/30		NP_001156506.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RPTOR	ENST00000306801.8	c.766C>T	p.Pro256Ser	missense_variant	6/34	1	NM_020761.3	ENSP00000307272.3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 26, 2024

The c.766C>T (p.P256S) alteration is located in exon 6 (coding exon 6) of the RPTOR gene. This alteration results from a C to T substitution at nucleotide position 766, causing the proline (P) at amino acid position 256 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.41
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.020
CADD	Uncertain	24
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.85	.;D;.
Eigen	Uncertain	0.57
Eigen_PC	Uncertain	0.65
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.98	D;D;D
M_CAP	Benign	0.017	T
MetaRNN	Uncertain	0.70	D;D;D
MetaSVM	Benign	-0.53	T
MutationAssessor	Uncertain	2.3	M;M;M
PrimateAI	Uncertain	0.74	T
PROVEAN	Pathogenic	-5.9	.;D;D
REVEL	Uncertain	0.33
Sift	Uncertain	0.0080	.;D;D
Sift4G	Benign	0.071	T;T;T
Polyphen		0.71	.;P;.
Vest4		0.81
MutPred		0.46		Gain of glycosylation at P256 (P = 0.0439);Gain of glycosylation at P256 (P = 0.0439);Gain of glycosylation at P256 (P = 0.0439);
MVP		0.50
MPC		2.3
ClinPred		0.98	D
GERP RS		5.7
Varity_R		0.57
gMVP		0.89

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-78727921;