10-87961066-TTGACAAAGCAAATA-TCGCTT

Position:

• chr10-87961066-TTGACAAAGCAAATA-TCGCTT

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The ENST00000371953.8(PTEN):​c.975_988delinsCGCTT​(p.Asp326_Lys330delinsAlaTer) variant causes a stop gained, protein altering change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. L325L) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 31)
• Consequence: PTEN ENST00000371953.8 stop_gained, protein_altering
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 9.49

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 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 10-87961067-TGACAAAGCAAATA-CGCTT is Pathogenic according to our data. Variant chr10-87961067-TGACAAAGCAAATA-CGCTT is described in ClinVar as [Likely_pathogenic]. Clinvar id is 428215.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PTEN	NM_000314.8	c.975_988delinsCGCTT	p.Asp326_Lys330delinsAlaTer	stop_gained, protein_altering_variant	8/9	ENST00000371953.8	NP_000305.3
PTEN	NM_001304717.5	c.1494_1507delinsCGCTT	p.Asp499_Lys503delinsAlaTer	stop_gained, protein_altering_variant	9/10		NP_001291646.4
PTEN	NM_001304718.2	c.384_397delinsCGCTT	p.Asp129_Lys133delinsAlaTer	stop_gained, protein_altering_variant	8/9		NP_001291647.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PTEN	ENST00000371953.8	c.975_988delinsCGCTT	p.Asp326_Lys330delinsAlaTer	stop_gained, protein_altering_variant	8/9	1	NM_000314.8	ENSP00000361021	P1

Frequencies

GnomAD3 genomes Cov.: 31

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 31

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Cowden syndrome 1 Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Center for Human Genetics, Inc, Center for Human Genetics, Inc

Nov 01, 2016

- -

Hereditary cancer-predisposing syndrome Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 18, 2016

The c.975_988del14insCGCTT pathogenic mutation, located in coding exon 8 of the PTEN gene, results from a deletion of 14 nucleotides and insertion of CGCTT, resulting in a premature stop codon within coding exon 8. This alteration leads to a truncation of the protein within the C2 (lipid membrane-binding) domain, a key domain required for tumor suppressor function (Hollander MC, Nat. Rev. Cancer 2011 Apr; 11(4):289-301). Since premature stop codons are typically deleterious in nature, this alteration is interpreted as a disease-causing mutation (ACMG Recommendations for Standards for Interpretation and Reporting of Sequence Variations. Revision 2007. Genet Med. 2008;10:294). -

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1114167640; hg19: chr10-89720824;