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NM_002880.4(RAF1):c.786T>A (p.Asn262Lys) AND not provided

Germline classification:
Pathogenic (2 submissions)
Last evaluated:
May 13, 2019
Review status:
2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts
Somatic classification
of clinical impact:
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Somatic classification
of oncogenicity:
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Record status:

Allele description [Variation Report for NM_002880.4(RAF1):c.786T>A (p.Asn262Lys)]

NM_002880.4(RAF1):c.786T>A (p.Asn262Lys)

RAF1:Raf-1 proto-oncogene, serine/threonine kinase [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
Genomic location:
Preferred name:
NM_002880.4(RAF1):c.786T>A (p.Asn262Lys)
  • NC_000003.12:g.12604184A>T
  • NG_007467.1:g.64996T>A
  • NM_001354689.3:c.786T>A
  • NM_001354690.3:c.786T>A
  • NM_001354691.3:c.543T>A
  • NM_001354692.3:c.543T>A
  • NM_001354693.3:c.687T>A
  • NM_001354694.3:c.543T>A
  • NM_001354695.3:c.444T>A
  • NM_002880.4:c.786T>AMANE SELECT
  • NP_001341618.1:p.Asn262Lys
  • NP_001341619.1:p.Asn262Lys
  • NP_001341620.1:p.Asn181Lys
  • NP_001341621.1:p.Asn181Lys
  • NP_001341622.1:p.Asn229Lys
  • NP_001341623.1:p.Asn181Lys
  • NP_001341624.1:p.Asn148Lys
  • NP_002871.1:p.Asn262Lys
  • NP_002871.1:p.Asn262Lys
  • LRG_413t1:c.786T>A
  • LRG_413t2:c.786T>A
  • LRG_413:g.64996T>A
  • LRG_413p1:p.Asn262Lys
  • LRG_413p2:p.Asn262Lys
  • NC_000003.11:g.12645683A>T
  • NM_002880.3:c.786T>A
  • NR_148940.3:n.1117T>A
  • NR_148941.3:n.1117T>A
  • NR_148942.3:n.1117T>A
  • c.786T>A
Protein change:
dbSNP: rs397516829
NCBI 1000 Genomes Browser:
Molecular consequence:
  • NM_001354689.3:c.786T>A - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001354690.3:c.786T>A - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001354691.3:c.543T>A - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001354692.3:c.543T>A - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001354693.3:c.687T>A - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001354694.3:c.543T>A - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001354695.3:c.444T>A - missense variant - [Sequence Ontology: SO:0001583]
  • NM_002880.4:c.786T>A - missense variant - [Sequence Ontology: SO:0001583]
  • NR_148940.3:n.1117T>A - non-coding transcript variant - [Sequence Ontology: SO:0001619]
  • NR_148941.3:n.1117T>A - non-coding transcript variant - [Sequence Ontology: SO:0001619]
  • NR_148942.3:n.1117T>A - non-coding transcript variant - [Sequence Ontology: SO:0001619]


none provided
MedGen: CN517202

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Assertion and evidence details

Submission AccessionSubmitterReview Status
(Assertion method)
Clinical Significance
(Last evaluated)
criteria provided, single submitter

(GeneDx Variant Classification (06012015))
(Mar 3, 2017)
germlineclinical testing

Citation Link,

SCV001714080Mayo Clinic Laboratories, Mayo Clinic
criteria provided, single submitter

(ClinGen RASopathy ACMG Specifications v1)
(May 13, 2019)
germlineclinical testing

PubMed (4)
[See all records that cite these PMIDs]

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineyesnot providednot providednot providednot providednot providedclinical testing
not providedgermlineunknown1not providednot providednot providednot providedclinical testing



Mutations in conserved regions 1, 2, and 3 of Raf-1 that activate transforming activity.

Chan EY, Stang SL, Bottorff DA, Stone JC.

Mol Carcinog. 2002 Apr;33(4):189-97.

PubMed [citation]

Clinical and mutation profile of pediatric patients with RASopathy-associated hypertrophic cardiomyopathy: results from a Chinese cohort.

Chen H, Li X, Liu X, Wang J, Zhang Z, Wu J, Huang M, Guo Y, Li F, Wang X, Fu L.

Orphanet J Rare Dis. 2019 Feb 7;14(1):29. doi: 10.1186/s13023-019-1010-z.

PubMed [citation]
See all PubMed Citations (4)

Details of each submission

From GeneDx, SCV000329734.7

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testingnot provided


The N262K variant has been reported previously as a de novo occurrence in a patient with Noonan spectrum disorder (Kobayashi et al., 2010). N262K is also reported as a pathogenic variant in ClinVar by a different clinical laboratory and apparently occurred de novo in a patient with Noonan syndrome (ClinVar SCV000061369.4; Landrum et al., 2015). It was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. The N262K variant is a semi-conservative amino acid substitution, which may impact secondary protein structure as these residues differ in some properties. This substitution occurs at a position within the CR2 domain that is conserved across species and in silico analysis predicts this variant is probably damaging to the protein structure/function. Missense variants at the same (N262I) and in nearby residues (S257L, S259P/T/F, T260I/R, P261T/S/A/R/L/H, V263A/D) have been reported in the Human Gene Mutation Database in association with Noonan spectrum disorders (Stenson et al., 2014), supporting the functional importance of this region of the protein. Additionally, functional studies of the N262K variant show that it inhibits the phosphorylation of nearby codon serine-259, which is necessary for RAF1 activation, abolishes binding of 14-3-3 protein complex, and results in partial activation of ERK (Kobayashi et al., 2010). Therefore, we interpret N262K as a pathogenic variant.

OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineyesnot providednot providednot providednot providednot providednot providednot provided

From Mayo Clinic Laboratories, Mayo Clinic, SCV001714080.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not provided1not providednot providedclinical testing PubMed (4)


PM1, PM2, PM5, PM6_Strong, PS3_Moderate

OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot provided1not providednot providednot provided

Last Updated: Jun 10, 2023