rs370795352

Positions:

• chr10-87933163-T-A
• chr10-87933163-T-C

Variant summary

Our verdict is Pathogenic. Variant got 19 ACMG points: 19P and 0B. PM1 PM2 PM5 PP2 PP3_Strong PP5_Very_Strong

The NM_000314.8(PTEN):​c.404T>A​(p.Ile135Lys) variant causes a missense 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. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I135T) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PTEN NM_000314.8 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 7.62

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]

PTEN (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 19 ACMG points.

• PM1: In a helix (size 12) in uniprot entity PTEN_HUMAN there are 17 pathogenic changes around while only 0 benign (100%) 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 chr10-87933163-T-C is described in Lovd as [Likely_pathogenic].
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), PTEN. . Gene score misZ 3.4883 (greater than the threshold 3.09). Trascript score misZ 4.1129 (greater than threshold 3.09). GenCC has associacion of gene with 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: MetaRNN computational evidence supports a deleterious effect, 0.982
• PP5: Variant 10-87933163-T-A is Pathogenic according to our data. Variant chr10-87933163-T-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 428235.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.404T>A	p.Ile135Lys	missense_variant	5/9	ENST00000371953.8	NP_000305.3
PTEN	NM_001304717.5	c.923T>A	p.Ile308Lys	missense_variant	6/10		NP_001291646.4
PTEN	NM_001304718.2	c.-347T>A		5_prime_UTR_variant	4/9		NP_001291647.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PTEN	ENST00000371953.8	c.404T>A	p.Ile135Lys	missense_variant	5/9	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:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Malignant tumor of prostate;C1854416:Macrocephaly-autism syndrome;C2751642:Glioma susceptibility 2;C3551915:Familial meningioma;CN072330:Cowden syndrome 1 Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Apr 08, 2022

- -

Hereditary cancer-predisposing syndrome Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 13, 2024

The p.I135K variant (also known as c.404T>A), located in coding exon 5 of the PTEN gene, results from a T to A substitution at nucleotide position 404. The isoleucine at codon 135 is replaced by lysine, an amino acid with dissimilar properties. This variant demonstrated low intracellular protein abundance in a massively parallel functional assay (Matreyek KA et al. Nat Genet, 2018 Jun;50:874-882). In a massively parallel functional assay using a humanized yeast model, lipid phosphatase activity for this variant was functionally deficient (Mighell TL et al. Am. J. Hum. Genet. 2018 05;102:943-955). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. This variant is considered to be rare based on population cohorts in the Genome Aggregation Database (gnomAD). Based on the majority of available evidence to date, this variant is likely to be pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.59	D
BayesDel_noAF	Pathogenic	0.60
CADD	Pathogenic	32
DANN	Benign	0.96
DEOGEN2	Pathogenic	0.96	D
Eigen	Pathogenic	0.90
Eigen_PC	Pathogenic	0.81
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.97	D
M_CAP	Pathogenic	0.89	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	3.6	H
PrimateAI	Pathogenic	0.93	D
PROVEAN	Pathogenic	-6.4	D
REVEL	Pathogenic	0.99
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	D
Vest4		0.97
MutPred		0.85		Gain of MoRF binding (P = 0.0116);
MVP		1.0
MPC		3.1
ClinPred		1.0	D
GERP RS		5.2
Varity_R		0.99
gMVP		1.0

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: rs370795352; hg19: chr10-89692920; COSMIC: COSV64288596;