chr12-112453279-G-T

Position:

• chr12-112453279-G-T

Variant summary

Our verdict is Pathogenic. Variant got 21 ACMG points: 21P and 0B. PS1 PM1 PM2 PP2 PP3_Strong PP5_Very_Strong

The NM_002834.5(PTPN11):​c.417G>T​(p.Glu139Asp) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Another nucleotide change resulting in same amino acid change has been previously reported as Likely pathogenicin Lovd.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PTPN11 NM_002834.5 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:8
• Conservation: PhyloP100: 3.63

Genes affected

PTPN11 (HGNC:9644): (protein tyrosine phosphatase non-receptor type 11) The protein encoded by this gene is a member of the protein tyrosine phosphatase (PTP) family. PTPs are known to be signaling molecules that regulate a variety of cellular processes including cell growth, differentiation, mitotic cycle, and oncogenic transformation. This PTP contains two tandem Src homology-2 domains, which function as phospho-tyrosine binding domains and mediate the interaction of this PTP with its substrates. This PTP is widely expressed in most tissues and plays a regulatory role in various cell signaling events that are important for a diversity of cell functions, such as mitogenic activation, metabolic control, transcription regulation, and cell migration. Mutations in this gene are a cause of Noonan syndrome as well as acute myeloid leukemia. [provided by RefSeq, Aug 2016]

ACMG classification

Verdict is Pathogenic. Variant got 21 ACMG points.

• PS1: Transcript NM_002834.5 (PTPN11) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in Lovd
• PM1: In a strand (size 5) in uniprot entity PTN11_HUMAN there are 5 pathogenic changes around while only 0 benign (100%) in NM_002834.5
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), PTPN11. . Gene score misZ 3.1293 (greater than the threshold 3.09). Trascript score misZ 4.9438 (greater than threshold 3.09). GenCC has associacion of gene with Noonan syndrome and Noonan-related syndrome, Noonan syndrome with multiple lentigines, metachondromatosis, Noonan syndrome 1, Noonan syndrome, cardiofaciocutaneous syndrome, LEOPARD syndrome 1, Costello syndrome.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.942
• PP5: Variant 12-112453279-G-T is Pathogenic according to our data. Variant chr12-112453279-G-T is described in ClinVar as [Pathogenic]. Clinvar id is 40512.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr12-112453279-G-T is described in Lovd as [Likely_pathogenic]. Variant chr12-112453279-G-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PTPN11	NM_002834.5	c.417G>T	p.Glu139Asp	missense_variant	4/16	ENST00000351677.7	NP_002825.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PTPN11	ENST00000351677.7	c.417G>T	p.Glu139Asp	missense_variant	4/16	1	NM_002834.5	ENSP00000340944	A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:8

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:3

Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Dec 15, 2023	Identified in patients with features of PTPN11-related RASopathy in the literature and tested at GeneDx (PMID: 11992261); Published functional studies demonstrate a damaging effect (PMID: 20308328, 18372317); Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 22135187, 18372317, 23584145, 20308328, 24628801, 30355600, 21407260, 11992261, 22315187, 33318624) -
Pathogenic, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Pathogenic, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -

Noonan syndrome 1 Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Institute of Human Genetics Munich, Klinikum Rechts Der Isar, TU München	Jun 13, 2018	- -
Pathogenic, criteria provided, single submitter	clinical testing	Centre de Biologie Pathologie Génétique, Centre Hospitalier Universitaire de Lille	-	- -

Inborn genetic diseases Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 21, 2017

- -

Noonan syndrome;C0349639:Juvenile myelomonocytic leukemia Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Jan 16, 2015

The p.Glu139Asp (c.417G>T) variant in PTPN11 has been identified in 3 individua ls with Noonan syndrome (Tartaglia 2002, LMM unpublished data). It has not been identified in large population studies. In addition, another nucleotide change (c.417G>C) that results in the same amino acid change has also been reported in at least 10 individuals with Noonan syndrome, 1 individual with Noonan syndrome and acute lymphoblastic leukemia (ALL), 1 individual with Juvenile myelomonocyti c leukemia (JMML), and 1 individual with Noonan syndrome that developed ALL and JMML (Musante 2002, Loh 2004, Bertola 2006, Chan 2006, Hung 2007, Karow 2007, Ko 2008, Derbent 2010, Jongmans 2011, Pauli 2012, Timeus 2013). This variant has b een reported to show both familial segregation and to have occurred de novo (Jon gmans 2005, Houweling 2010). In summary, this variant meets our criteria to be c lassified as pathogenic (http://www.partners.org/personalizedmedicine/LMM). -

RASopathy Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 22, 2021

This sequence change replaces glutamic acid with aspartic acid at codon 139 of the PTPN11 protein (p.Glu139Asp). The glutamic acid residue is moderately conserved and there is a small physicochemical difference between glutamic acid and aspartic acid. This variant is not present in population databases (ExAC no frequency). For these reasons, this variant has been classified as Pathogenic. Experimental studies have shown that this missense change affects PTPN11 protein function (PMID: 18372317, 23584145, 20308328). This missense change has been observed in individual(s) with Noonan syndrome (PMID: 11992261, 16358218, 19020799, 17339163). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 40512). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
CardioboostCm	Uncertain	0.42
BayesDel_addAF	Pathogenic	0.36	D
BayesDel_noAF	Pathogenic	0.28
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.81	.;.;.;D
Eigen	Uncertain	0.61
Eigen_PC	Uncertain	0.61
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.67	T;T;T;T
M_CAP	Uncertain	0.089	D
MetaRNN	Pathogenic	0.94	D;D;D;D
MetaSVM	Uncertain	0.44	D
MutationAssessor	Benign	1.1	L;L;.;L
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.82	D
PROVEAN	Uncertain	-2.4	N;D;.;.
REVEL	Pathogenic	0.77
Sift	Uncertain	0.0090	D;D;.;.
Sift4G	Uncertain	0.015	D;D;.;D
Polyphen		0.99	D;D;.;.
Vest4		0.78
MutPred		0.90		Gain of relative solvent accessibility (P = 0.1259);Gain of relative solvent accessibility (P = 0.1259);Gain of relative solvent accessibility (P = 0.1259);Gain of relative solvent accessibility (P = 0.1259);
MVP		0.98
MPC		1.8
ClinPred		0.96	D
GERP RS		4.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8
Varity_R		0.71
gMVP		0.61

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: rs397507520; hg19: chr12-112891083; COSMIC: COSV61007093; COSMIC: COSV61007093;