NM_000314.8:c.493G>C

Variant names:

• chr10-87952118-G-C
• NM_000314.8:c.493G>C

Variant summary

Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PM1 PM2 PM5 PP2 PP3 PP5_Very_Strong

The NM_000314.8(PTEN):​c.493G>C​(p.Gly165Arg) variant causes a missense, splice region 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. 15/23 in silico tools predict a damaging outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Pathogenic in Lovd. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G165V) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PTEN NM_000314.8 missense, splice_region
• Scores: Splicing: ADA: 0.9971
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:4
• Conservation: PhyloP100: 9.46

Genes affected

PTEN (HGNC:9588): (phosphatase and tensin homolog) This gene was identified as a tumor suppressor that is mutated in a large number of cancers at high frequency. The protein encoded by this gene is a phosphatidylinositol-3,4,5-trisphosphate 3-phosphatase. It contains a tensin like domain as well as a catalytic domain similar to that of the dual specificity protein tyrosine phosphatases. Unlike most of the protein tyrosine phosphatases, this protein preferentially dephosphorylates phosphoinositide substrates. It negatively regulates intracellular levels of phosphatidylinositol-3,4,5-trisphosphate in cells and functions as a tumor suppressor by negatively regulating AKT/PKB signaling pathway. The use of a non-canonical (CUG) upstream initiation site produces a longer isoform that initiates translation with a leucine, and is thought to be preferentially associated with the mitochondrial inner membrane. This longer isoform may help regulate energy metabolism in the mitochondria. A pseudogene of this gene is found on chromosome 9. Alternative splicing and the use of multiple translation start codons results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Feb 2015]

ACMG classification

Verdict is Pathogenic. Variant got 16 ACMG points.

• PM1: In a domain Phosphatase tensin-type (size 171) in uniprot entity PTEN_HUMAN there are 110 pathogenic changes around while only 5 benign (96%) in NM_000314.8
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr10-87952119-G-T is described in Lovd as [Likely_pathogenic].
• PP2: Missense variant in the PTEN gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 209 curated pathogenic missense variants (we use a threshold of 10). The gene has 22 curated benign missense variants. Gene score misZ: 3.4883 (above the threshold of 3.09). Trascript score misZ: 4.1129 (above the threshold of 3.09). GenCC associations: The gene is linked to Lhermitte-Duclos disease, Bannayan-Riley-Ruvalcaba syndrome, Proteus syndrome, macrocephaly-autism syndrome, Cowden syndrome 1, Cowden disease, Proteus-like syndrome, leiomyosarcoma, activated PI3K-delta syndrome, PTEN hamartoma tumor syndrome, glioma susceptibility 2, renal cell carcinoma.
• PP3: Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.
• PP5: Variant 10-87952118-G-C is Pathogenic according to our data. Variant chr10-87952118-G-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1067498.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr10-87952118-G-C is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PTEN	NM_000314.8	c.493G>C	p.Gly165Arg	missense_variant, splice_region_variant	Exon 6 of 9	ENST00000371953.8	NP_000305.3
PTEN	NM_001304717.5	c.1012G>C	p.Gly338Arg	missense_variant, splice_region_variant	Exon 7 of 10		NP_001291646.4
PTEN	NM_001304718.2	c.-99G>C		splice_region_variant	Exon 6 of 9		NP_001291647.1
PTEN	NM_001304718.2	c.-99G>C		5_prime_UTR_variant	Exon 6 of 9		NP_001291647.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PTEN	ENST00000371953.8	c.493G>C	p.Gly165Arg	missense_variant, splice_region_variant	Exon 6 of 9	1	NM_000314.8	ENSP00000361021.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Cowden syndrome 1 Pathogenic:2

Sep 28, 2023

Myriad Genetics, Inc.

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely pathogenic. This variant has been reported in multiple individuals with clinical features of gene-specific disease [PMID: 20712882, 21659347, 21194675, 25669429]. Functional studies indicate this variant impacts protein function [PMID: 10866302]. This variant is expected to disrupt protein structure [Myriad internal data]. -

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Seattle Children's Hospital Molecular Genetics Laboratory, Seattle Children's Hospital

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Gly165Arg variant substitutes the glycine at amino acid position 165 with arginine in the phosphatase tension-type domain. This variant has been reported in multiple unrelated individual with PTEN Hamartoma Tumor Syndrome (PHTS) (PMID: 21659347, PMID: 21194675, PMID: 35227301). In silico tools predict this to be a damaging variant that may affect splicing. Functional studies have shown that the p.Gly165Arg variant eliminates phosphatase activity (PMID: 10866302). -

PTEN hamartoma tumor syndrome Pathogenic:1

Jun 11, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 165 of the PTEN protein (p.Gly165Arg). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individuals with PTEN-related conditions (PMID: 20712882, 21194675, 21659347; Invitae). ClinVar contains an entry for this variant (Variation ID: 1067498). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. Experimental studies have shown that this missense change affects PTEN function (PMID: 9256433, 10866302). For these reasons, this variant has been classified as Pathogenic. -

not provided Pathogenic:1

Apr 29, 2024

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Published functional studies demonstrate a damaging effect: loss of phosphatase activity (PMID: 9256433, 10866302, 29706350); Not observed at significant frequency in large population cohorts (gnomAD); Reported in individuals with features of PTEN Hamartoma Tumor syndrome in published literature (PMID: 35227301, 21194675); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Same amino acid substitution caused by a different nucleotide change (c.493G>A) has been reported as pathogenic at GeneDx in association with PTEN Hamartoma Tumor syndrome; This variant is associated with the following publications: (PMID: 18669439, 18794879, 11875759, 25257301, 25956405, 10866302, 29706350, 9256433, 21659347, 25669429, 24475377, 35227301, 21194675, 20712882) -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.52	D
BayesDel_noAF	Pathogenic	0.51
CADD	Pathogenic	35
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.96	D
Eigen	Pathogenic	0.95
Eigen_PC	Pathogenic	0.86
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Pathogenic	0.97	D
M_CAP	Pathogenic	0.89	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	3.5	H
PrimateAI	Pathogenic	0.94	D
PROVEAN	Pathogenic	-7.3	D
REVEL	Pathogenic	0.94
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0030	D
Polyphen		1.0	D
Vest4		0.99
MutPred		0.82		Gain of MoRF binding (P = 0.0123);
MVP		0.98
MPC		2.6
ClinPred		1.0	D
GERP RS		4.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.94
gMVP		0.98

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.90
SpliceAI score (max)		0.020		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: chr10-89711875; COSMIC: COSV100910106; COSMIC: COSV100910106;