rs1554825526

chr10-87960951-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 5P and 1B. PM1 PM2 PP2 BP4

The NM_000314.8(PTEN):c.859T>C(p.Ser287Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000547 in 1,461,210 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S287T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: PTEN NM_000314.8 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:4
• Conservation: PhyloP100: 2.84

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 4 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 16 uncertain in NM_000314.8
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, PTEN
• BP4: Computational evidence support a benign effect (MetaRNN=0.285444).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PTEN	NM_000314.8	c.859T>C	p.Ser287Pro	missense_variant	8/9	ENST00000371953.8
PTEN	NM_001304717.5	c.1378T>C	p.Ser460Pro	missense_variant	9/10
PTEN	NM_001304718.2	c.268T>C	p.Ser90Pro	missense_variant	8/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PTEN	ENST00000371953.8	c.859T>C	p.Ser287Pro	missense_variant	8/9	1	NM_000314.8	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000547 AC: 8 AN: 1461210 Hom.: 0 Cov.: 36 AF XY: 0.00000413 AC XY: 3 AN XY: 726922

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000202

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

PTEN hamartoma tumor syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jul 10, 2023

This sequence change replaces serine, which is neutral and polar, with proline, which is neutral and non-polar, at codon 287 of the PTEN protein (p.Ser287Pro). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with breast cancer (PMID: 30287823). ClinVar contains an entry for this variant (Variation ID: 536547). Advanced modeling performed at Invitae incorporating data from internal and/or published experimental studies (Invitae) indicates that this missense variant is expected to disrupt PTEN function. Experimental studies have shown that this missense change does not substantially affect PTEN function (PMID: 29706350, 29785012). 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. -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Dec 09, 2021

Not observed at significant frequency in large population cohorts (Lek et al., 2016); In silico analysis supports that this missense variant does not alter protein structure/function; Identified in both cases and controls in a breast cancer case-control study in a Japanese population (Momozawa et al., 2018); Published functional studies demonstrate wild type-like lipid phosphatase activity and protein stability (Mighell et al., 2018; Matreyek et al., 2018); This variant is associated with the following publications: (PMID: 14623110, 32566746, 30287823, 29706350, 18626510, 29785012) -

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 19, 2019

The p.S287P variant (also known as c.859T>C), located in coding exon 8 of the PTEN gene, results from a T to C substitution at nucleotide position 859. The serine at codon 287 is replaced by proline, an amino acid with similar properties. This alteration has been reported with a carrier frequency of 0.00028 in 7,051 unselected breast cancer patients and 0.00027 in 11,241 female controls of Japanese ancestry (Momozawa Y et al. Nat Commun, 2018 10;9:4083). This amino acid position is well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Hereditary breast ovarian cancer syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

research

Cancer Genomics Group, Japanese Foundation For Cancer Research

May 01, 2019

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.071
BayesDel_addAF	Uncertain	0.083	D
BayesDel_noAF	Benign	-0.12
Cadd	Uncertain	23
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.69	D;.
Eigen	Benign	-0.12
Eigen_PC	Benign	0.056
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.87	D;D
M_CAP	Benign	0.046	D
MetaRNN	Benign	0.29	T;T
MetaSVM	Benign	-0.38	T
MutationAssessor	Benign	1.4	L;.
MutationTaster	Benign	0.99	D
PrimateAI	Uncertain	0.64	T
PROVEAN	Benign	-0.93	N;.
REVEL	Uncertain	0.36
Sift	Benign	0.16	T;.
Sift4G	Benign	0.085	T;T
Polyphen		0.0	B;.
Vest4		0.69
MutPred		0.43		Loss of phosphorylation at S287 (P = 0.0339);.;
MVP		0.93
MPC		1.4
ClinPred		0.51	D
GERP RS		5.1
Varity_R		0.23
gMVP		0.82

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: rs1554825526; hg19: chr10-89720708;