18-12884083-G-A

Position:

• chr18-12884083-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_002828.4(PTPN2):​c.59C>T​(p.Pro20Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000007 in 1,427,866 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.0e-7 (0 hom.)
• Consequence: PTPN2 NM_002828.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.69

Genes affected

PTPN2 (HGNC:9650): (protein tyrosine phosphatase non-receptor type 2) The protein encoded by this gene is a member of the protein tyrosine phosphatase (PTP) family. Members of the PTP family share a highly conserved catalytic motif, which is essential for the catalytic activity. PTPs are known to be signaling molecules that regulate a variety of cellular processes including cell growth, differentiation, mitotic cycle, and oncogenic transformation. Epidermal growth factor receptor and the adaptor protein Shc were reported to be substrates of this PTP, which suggested the roles in growth factor mediated cell signaling. Multiple alternatively spliced transcript variants encoding different isoforms have been found. Two highly related but distinctly processed pseudogenes that localize to chromosomes 1 and 13, respectively, have been reported. [provided by RefSeq, May 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07473138).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PTPN2	NM_002828.4	c.59C>T	p.Pro20Leu	missense_variant	1/9	ENST00000309660.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PTPN2	ENST00000309660.10	c.59C>T	p.Pro20Leu	missense_variant	1/9	1	NM_002828.4	A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.00e-7 AC: 1 AN: 1427866 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 707764

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.12e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 04, 2022

The c.59C>T (p.P20L) alteration is located in exon 1 (coding exon 1) of the PTPN2 gene. This alteration results from a C to T substitution at nucleotide position 59, causing the proline (P) at amino acid position 20 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.59
CADD	Benign	17
DANN	Benign	0.90
DEOGEN2	Benign	0.040	.;.;.;T
Eigen	Benign	-0.80
Eigen_PC	Benign	-0.72
FATHMM_MKL	Benign	0.29	N
LIST_S2	Uncertain	0.93	D;D;D;D
M_CAP	Benign	0.026	D
MetaRNN	Benign	0.075	T;T;T;T
MetaSVM	Benign	-0.85	T
MutationAssessor	Benign	0.0	N;N;N;N
MutationTaster	Benign	0.99	D;D;D;D
PrimateAI	Uncertain	0.57	T
PROVEAN	Benign	-1.0	N;.;N;N
REVEL	Benign	0.025
Sift	Benign	0.31	T;.;T;T
Sift4G	Benign	0.30	T;T;T;T
Polyphen		0.0010	B;.;.;B
Vest4		0.15
MutPred		0.39		Loss of disorder (P = 0.0223);Loss of disorder (P = 0.0223);Loss of disorder (P = 0.0223);Loss of disorder (P = 0.0223);
MVP		0.14
MPC		0.86
ClinPred		0.11	T
GERP RS		-0.35
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.069
gMVP		0.42

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr18-12884082;