chr10-87864568-C-G

Variant names:

• chr10-87864568-C-G
• rs587781291
• NM_000314.8:c.79+20C>G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 1P and 1B. PM2_Supporting BP7

This summary comes from the ClinGen Evidence Repository: PTEN c.79+20C>G (IVS1+20C>G) is currently classified as a variant of uncertain significance for PTEN Hamartoma Tumor syndrome in an autosomal dominant manner using modified ACMG criteria (ACMG Classification Rules Specified for PTEN Variant Curation version 3.0.0). Please see a summary of the rules and criteria codes in the “PTEN ACMG Specifications Summary” document (assertion method column).PM2_Supporting: Absent in large sequenced populations (PMID 27535533).BP7: Variant is intronic and at or beyond +7/-21, nucleotide is not conserved, and no splicing impact is predicted. LINK:https://erepo.genome.network/evrepo/ui/classification/CA000575/MONDO:0017623/003

• Frequency: Genomes: not found (cov: 33)
• Consequence: PTEN NM_000314.8 intron
• Clinical Significance: Uncertain significance reviewed by expert panel U:1 B:1
• Conservation: PhyloP100: 0.879

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 0 ACMG points.

• PM2: For more information check the summary or visit ClinGen Evidence Repository.
• BP7: For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PTEN	NM_000314.8	c.79+20C>G		intron_variant	Intron 1 of 8	ENST00000371953.8	NP_000305.3
PTEN	NM_001304717.5	c.598+20C>G		intron_variant	Intron 2 of 9		NP_001291646.4
PTEN	NM_001304718.2	c.-627+20C>G		intron_variant	Intron 1 of 8		NP_001291647.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PTEN	ENST00000371953.8	c.79+20C>G		intron_variant	Intron 1 of 8	1	NM_000314.8	ENSP00000361021.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1 Benign:1

Revision: reviewed by expert panel

Submissions by phenotype

PTEN hamartoma tumor syndrome Uncertain:1

Aug 04, 2023

Clingen PTEN Variant Curation Expert Panel, Clingen

Significance: Uncertain significance

Review Status: reviewed by expert panel

Collection Method: curation

PTEN c.79+20C>G (IVS1+20C>G) is currently classified as a variant of uncertain significance for PTEN Hamartoma Tumor syndrome in an autosomal dominant manner using modified ACMG criteria (ACMG Classification Rules Specified for PTEN Variant Curation version 3.0.0). Please see a summary of the rules and criteria codes in the “PTEN ACMG Specifications Summary” document (assertion method column). PM2_Supporting: Absent in large sequenced populations (PMID 27535533). BP7: Variant is intronic and at or beyond +7/-21, nucleotide is not conserved, and no splicing impact is predicted. -

Hereditary cancer-predisposing syndrome Benign:1

Nov 26, 2012

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.72
CADD	Benign	16
DANN	Benign	0.83

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs587781291; hg19: chr10-89624325;