chr10-87965365-G-A

Position:

• chr10-87965365-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PP2 BS3_Supporting PM2

This summary comes from the ClinGen Evidence Repository: PTEN c.1105G>A (p.Val369Ile) is currently classified as a variant of uncertain significance for PTEN Hamartoma Tumor syndrome in an autosomal dominant manner using modified ACMG criteria (PMID 30311380). Please see a summary of the rules and criteria codes in the “PTEN ACMG Specifications Summary” document (assertion method column).PM2: Absent in large sequenced populationsPP2: PTEN is defined by the PTEN Expert Panel as a gene that has a low rate of benign missense variation and where missense variants are a common mechanism of diseaseBS3_P: In vitro or in vivo functional study or studies showing no damaging effect on protein function but BS3 not met. (PMID 29706350) LINK:https://erepo.genome.network/evrepo/ui/classification/CA000295/MONDO:0017623/003

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000048 (0 hom.)
• Consequence: PTEN NM_000314.8 missense
• Clinical Significance: Uncertain significance reviewed by expert panel U:4
• Conservation: PhyloP100: 9.56

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 Uncertain_significance. Variant got 2 ACMG points.

• PM2: For more information check the summary or visit ClinGen Evidence Repository.
• PP2: For more information check the summary or visit ClinGen Evidence Repository.
• BS3: For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PTEN	NM_000314.8	c.1105G>A	p.Val369Ile	missense_variant	9/9	ENST00000371953.8	NP_000305.3
PTEN	NM_001304717.5	c.1624G>A	p.Val542Ile	missense_variant	10/10		NP_001291646.4
PTEN	NM_001304718.2	c.514G>A	p.Val172Ile	missense_variant	9/9		NP_001291647.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PTEN	ENST00000371953.8	c.1105G>A	p.Val369Ile	missense_variant	9/9	1	NM_000314.8	ENSP00000361021	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000480 AC: 7 AN: 1457322 Hom.: 0 Cov.: 33 AF XY: 0.00000690 AC XY: 5 AN XY: 724676

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: 0.0000350

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000361

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: reviewed by expert panel

Submissions by phenotype

PTEN hamartoma tumor syndrome Uncertain:2

Uncertain significance, reviewed by expert panel	curation	Clingen PTEN Variant Curation Expert Panel, Clingen	Mar 23, 2020	PTEN c.1105G>A (p.Val369Ile) is currently classified as a variant of uncertain significance for PTEN Hamartoma Tumor syndrome in an autosomal dominant manner using modified ACMG criteria (PMID 30311380). Please see a summary of the rules and criteria codes in the "PTEN ACMG Specifications Summary" document (assertion method column). PM2: Absent in large sequenced populations PP2: PTEN is defined by the PTEN Expert Panel as a gene that has a low rate of benign missense variation and where missense variants are a common mechanism of disease BS3_P: In vitro or in vivo functional study or studies showing no damaging effect on protein function but BS3 not met. (PMID 29706350) -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 04, 2022	In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. ClinVar contains an entry for this variant (Variation ID: 142088). Experimental studies have shown that this missense change does not substantially affect PTEN function (PMID: 29706350). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt PTEN protein function. This variant has not been reported in the literature in individuals affected with PTEN-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces valine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 369 of the PTEN protein (p.Val369Ile). -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jan 12, 2017

This variant is denoted PTEN c.1105G>A at the cDNA level, p.Val369Ile (V369I) at the protein level, and results in the change of a Valine to an Isoleucine (GTT>ATT). This variant has not, to our knowledge, been published in the literature as pathogenic or benign. PTEN Val369Ile was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, suggesting it is not a common benign variant in these populations. Since Valine and Isoleucine share similar properties, this is considered a conservative amino acid substitution. PTEN Val369Ile occurs at a position that is conserved across species and is located in the C-terminal domain (Wang 2008). In silico analyses are inconsistent regarding the effect this variant may have on protein structure and function. Based on currently available evidence, it is unclear whether PTEN Val369Ile is a pathogenic or benign variant. We consider it to be a variant of uncertain significance. -

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 02, 2013

Thep.V369I variant (also known as c.1105G>A) is located in coding exon 9 of the PTEN gene. This alteration results from a G to A substitution at nucleotide position 1105. The valine at codon 369 is replaced by isoleucine, an amino acid with highly similar properties.This variant was not reported in population-based cohorts in the following databases: Database of Single Nucleotide Polymorphisms (dbSNP), NHLBI Exome Sequencing Project (ESP) and 1000 Genomes Project. To date, this alteration has been detected with an allele frequency of approximately 0.01% (greater than 14,000 alleles tested) in our clinical cohort (includes this individual). Based on protein sequence alignment, this amino acid position is completely conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.090
BayesDel_addAF	Pathogenic	0.18	D
BayesDel_noAF	Uncertain	0.020
CADD	Uncertain	24
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.51	D
Eigen	Benign	0.10
Eigen_PC	Uncertain	0.32
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D
M_CAP	Uncertain	0.12	D
MetaRNN	Benign	0.24	T
MetaSVM	Uncertain	0.070	D
MutationAssessor	Benign	0.34	N
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.73	T
PROVEAN	Benign	-0.25	N
REVEL	Uncertain	0.42
Sift	Benign	0.46	T
Sift4G	Benign	0.46	T
Polyphen		0.19	B
Vest4		0.20
MutPred		0.17		Gain of glycosylation at S370 (P = 0.1724);
MVP		0.83
MPC		0.95
ClinPred		0.80	D
GERP RS		5.3
Varity_R		0.10
gMVP		0.091

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

LitVar

Other links and lift over

dbSNP: rs587782224; hg19: chr10-89725122;