VCV000289057.15 - ClinVar

NM_002834.5(PTPN11):c.1327C>T (p.His443Tyr)

Germline

Classification

criteria provided, multiple submitters, no conflicts. Learn more about how ClinVar calculates review status.

Uncertain significance

4 out of 4 submissions contributed to this classification

The aggregate germline classification for this variant, typically for a monogenic or Mendelian disorder as in the ACMG/AMP guidelines, or for response to a drug. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the aggregate classification.

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_002834.5(PTPN11):c.1327C>T (p.His443Tyr)

Variation ID: 289057 Accession: VCV000289057.15

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: 12q24.13 12: 112486577 (GRCh38) [ NCBI UCSC ] 12: 112924381 (GRCh37) [ NCBI UCSC ]

Timeline in ClinVar

	First in ClinVar Help The date this variant first appeared in ClinVar with each type of classification.	Last submission Help The date of the most recent submission for each type of classification for this variant.	Last evaluated Help The most recent date that a submitter evaluated this variant for each type of classification.
Germline	Dec 6, 2016	Feb 15, 2026	Jan 13, 2026

HGVS

Nucleotide	Protein	Molecular consequence
NM_002834.5:c.1327C>T MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_002825.3:p.His443Tyr	missense
NM_001330437.2:c.1339C>T	NP_001317366.1:p.His447Tyr	missense
NM_001374625.1:c.1324C>T	NP_001361554.1:p.His442Tyr	missense
NM_080601.3:c.1327C>T	NP_542168.1:p.His443Tyr	missense
NC_000012.12:g.112486577C>T
NC_000012.11:g.112924381C>T
NG_007459.1:g.72846C>T
LRG_614:g.72846C>T
LRG_614t1:c.1327C>T

... more HGVS ... less HGVS

Protein change

H443Y, H447Y, H442Y

Other names

Canonical SPDI

NC_000012.12:112486576:C:T

Global minor allele frequency (GMAF) Help The global minor allele frequency calculated by the 1000 Genomes Project. The minor allele at this location is indicated in parentheses and may be different from the allele represented by this VCV record.

Allele frequency Help The frequency of the allele represented by this VCV record.

Exome Aggregation Consortium (ExAC) 0.00001

The Genome Aggregation Database (gnomAD), exomes 0.00001

Trans-Omics for Precision Medicine (TOPMed) 0.00001

The Genome Aggregation Database (gnomAD) 0.00003

The Genome Aggregation Database (gnomAD), exomes 0.00004

Links

ClinGen: CA6798765 dbSNP: rs779236638 VarSome

Genes

Gene	OMIM	ClinGen Gene Dosage Sensitivity Curation		Variation Viewer Help Links to Variation Viewer, a genome browser to view variation data from NCBI databases.	Related variants
Gene	OMIM	HI score Help The haploinsufficiency score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.	TS score Help The triplosensitivity score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.		Within gene Help The number of variants in ClinVar that are contained within this gene, with a link to view the list of variants.	All Help The number of variants in ClinVar for this gene, including smaller variants within the gene and larger CNVs that overlap or fully contain the gene.
PTPN11		Sufficient evidence for dosage pathogenicity	No evidence available	GRCh38 GRCh37	1296	1310

Conditions - Germline

Condition Help The condition for this variant-condition (RCV) record in ClinVar.	Classification Help The aggregate germline classification for this variant-condition (RCV) record in ClinVar. The number of submissions that contribute to this aggregate classification is shown in parentheses. (# of submissions)	Review status Help The aggregate review status for this variant-condition (RCV) record in ClinVar. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status.	Last evaluated Help The most recent date that a submitter evaluated this variant for the condition.	Variation/condition record Help The RCV accession number, with most recent version number, for the variant-condition record, with a link to the RCV web page.
not provided	Uncertain significance (1)	criteria provided, single submitter	Jul 21, 2016	RCV000306612.5
RASopathy	Uncertain significance (1)	criteria provided, single submitter	Jan 13, 2026	RCV000654964.8
Cardiovascular phenotype	Uncertain significance (1)	criteria provided, single submitter	Jan 8, 2025	RCV002379149.3
Juvenile myelomonocytic leukemia LEOPARD syndrome 1 Metachondromatosis Noonan syndrome 1	Uncertain significance (1)	criteria provided, single submitter	Dec 8, 2021	RCV002487262.1

Submissions - Germline

Classification Help The submitted germline classification for each SCV record. (Last evaluated)	Review status Help Stars represent the review status, or the level of review supporting the submitted (SCV) record. This value is calculated by NCBI based on data from the submitter. Read our rules for calculating the review status. This column also includes a link to the submitter’s assertion criteria if provided, and the collection method. (Assertion criteria)	Condition Help The condition for the classification, provided by the submitter for this submitted (SCV) record. This column also includes the affected status and allele origin of individuals observed with this variant.	Submitter Help The submitting organization for this submitted (SCV) record. This column also includes the SCV accession and version number, the date this SCV first appeared in ClinVar, and the date that this SCV was last updated in ClinVar.	Expand all rows Collapse all rows Help This column includes more information supporting the classification, including citations, the comment on classification, and detailed evidence provided as observations of the variant by the submitter.
Uncertain significance (Dec 08, 2021) C Contributing to aggregate classification	criteria provided, single submitter (ACMG Guidelines, 2015)	LEOPARD syndrome 1 Metachondromatosis Noonan syndrome 1 Juvenile myelomonocytic leukemia	Fulgent Genetics, Fulgent Genetics Accession: SCV002776035.1 First in ClinVar: Dec 31, 2022 Last updated: Dec 31, 2022	Observation: 1 Collection method: clinical testing Allele origin: unknown Affected status: unknown Observation 1 Collection method: clinical testing Allele origin: unknown Affected status: unknown

Uncertain significance (Jul 21, 2016) C Contributing to aggregate classification	criteria provided, single submitter (EGL Classification Definitions 2015)	not provided	Eurofins Ntd Llc (ga) Accession: SCV000343331.5 First in ClinVar: Dec 06, 2016 Last updated: Apr 13, 2025	Other databases http://www.egl-eurofins.com/emvc… http://www.egl-eurofins.com/emvclass/emvclass.php?approved_symbol=PTPN11 Observation: 1 Collection method: clinical testing Allele origin: germline Affected status: unknown more Observation 1 Collection method: clinical testing Allele origin: germline Affected status: unknown Number of individuals with the variant: 1 Zygosity: Single Heterozygote Sex: mixed

Uncertain significance (Jan 08, 2025) C Contributing to aggregate classification	criteria provided, single submitter (Ambry Variant Classification Scheme 2023)	Cardiovascular phenotype	Ambry Genetics Accession: SCV002691596.3 First in ClinVar: Nov 29, 2022 Last updated: Apr 28, 2025	Comment: show The p.H443Y variant (also known as c.1327C>T), located in coding exon 11 of the PTPN11 gene, results from a C to T substitution at nucleotide position 1327. The histidine at codon 443 is replaced by tyrosine, an amino acid with similar properties. This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. (less) Observation: 1 Collection method: clinical testing Allele origin: germline Affected status: unknown Observation 1 Collection method: clinical testing Allele origin: germline Affected status: unknown

Uncertain significance (Jan 13, 2026) C Contributing to aggregate classification	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	RASopathy	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV000776874.7 First in ClinVar: May 28, 2018 Last updated: Feb 15, 2026	Comment: show This sequence change replaces histidine, which is basic and polar, with tyrosine, which is neutral and polar, at codon 443 of the PTPN11 protein (p.His443Tyr). This variant is present in population databases (rs779236638, gnomAD 0.007%). This variant has not been reported in the literature in individuals affected with PTPN11-related conditions. ClinVar contains an entry for this variant (Variation ID: 289057). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt PTPN11 protein function with a negative predictive value of 80%. 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. (less) Observation: 1 Collection method: clinical testing Allele origin: germline Affected status: unknown Observation 1 Collection method: clinical testing Allele origin: germline Affected status: unknown

Comment:

The p.H443Y variant (also known as c.1327C>T), located in coding exon 11 of the PTPN11 gene, results from a C to T substitution at nucleotide position 1327. The histidine at codon 443 is replaced by tyrosine, an amino acid with similar properties. This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

Comment:

This sequence change replaces histidine, which is basic and polar, with tyrosine, which is neutral and polar, at codon 443 of the PTPN11 protein (p.His443Tyr). This variant is present in population databases (rs779236638, gnomAD 0.007%). This variant has not been reported in the literature in individuals affected with PTPN11-related conditions. ClinVar contains an entry for this variant (Variation ID: 289057). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt PTPN11 protein function with a negative predictive value of 80%. 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.

Citations for germline classification of this variant

Title	Author	Journal	Year	Link
http://www.egl-eurofins.com/emvclass/emvclass.php?approved_symbol=PTPN11	-	-	-	-

Text-mined citations for rs779236638 ...

These citations are identified by LitVar using the rs number, so they may include citations for more than one variant at this location. Please review the LitVar results carefully for your variant of interest.

Record last updated Feb 15, 2026