chr3-12591708-C-A

Variant names:

• chr3-12591708-C-A
• rs730880382
• NM_002880.4:c.1193G>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PP3 PM2_Supporting

This summary comes from the ClinGen Evidence Repository: The c.1193G>T variant in the RAF1 gene is a missense variant predicted to cause substitution of arginine by leucine at amino acid 398 (p.Arg398Leu). This variant is absent from gnomAD v2 (PM2_Supporting). The computational predictor REVEL gives a score of 0.861, which is above the threshold of 0.7 and is evidence that correlates with impact to RAF1 function. The variant is also entirely conserved in the UCSC database, and Alamut does not predict an impact to splicing (PP3). This variant has been identified in at least 5 probands with variable phenotypic features, with two of them having a clinical suspicion of Noonan syndrome (PS4 not met; Rady Children's Institute for Genomic Medicine internal communications, Invitae; SCV000209025.5; SCV000207671.1; SCV000552095.2, SCV000552095.6). In summary, this variant meets criteria to be classified as a variant of uncertain significance for autosomal dominant RASopathies based on the ACMG/AMP criteria applied, as specified by the ClinGen RASopathy Variant Curation Expert Panel: PM2_Supporting, PP3. (Specification Version 2.3, 12/3/2024) LINK:https://erepo.genome.network/evrepo/ui/classification/CA235336/MONDO:0021060/040

• Frequency: Genomes: not found (cov: 32)
• Consequence: RAF1 NM_001354689.3 missense, splice_region
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Uncertain significance reviewed by expert panel P:2 U:4
• Conservation: PhyloP100: 7.90
• Publications: 6 publications found

Genes affected

RAF1 (HGNC:9829): (Raf-1 proto-oncogene, serine/threonine kinase) This gene is the cellular homolog of viral raf gene (v-raf). The encoded protein is a MAP kinase kinase kinase (MAP3K), which functions downstream of the Ras family of membrane associated GTPases to which it binds directly. Once activated, the cellular RAF1 protein can phosphorylate to activate the dual specificity protein kinases MEK1 and MEK2, which in turn phosphorylate to activate the serine/threonine specific protein kinases, ERK1 and ERK2. Activated ERKs are pleiotropic effectors of cell physiology and play an important role in the control of gene expression involved in the cell division cycle, apoptosis, cell differentiation and cell migration. Mutations in this gene are associated with Noonan syndrome 5 and LEOPARD syndrome 2. [provided by RefSeq, Jul 2008]

RAF1 Gene-Disease associations (from GenCC):

• Noonan syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• Noonan syndrome 5

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics, PanelApp Australia, G2P
• dilated cardiomyopathy 1NN

  Inheritance: AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• LEOPARD syndrome 2

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• familial isolated dilated cardiomyopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Noonan syndrome with multiple lentigines

  Inheritance: AD Classification: SUPPORTIVE, LIMITED Submitted by: Orphanet, ClinGen
• cardiofaciocutaneous syndrome

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
• Costello syndrome

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: For more information check the summary or visit ClinGen Evidence Repository.
• PP3: For more information check the summary or visit ClinGen Evidence Repository.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001354689.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RAF1	NM_002880.4	MANE Select	c.1193G>T	p.Arg398Leu	missense splice_region	Exon 11 of 17	NP_002871.1
	RAF1	NM_001354689.3		c.1253G>T	p.Arg418Leu	missense splice_region	Exon 12 of 18	NP_001341618.1
	RAF1	NM_001354690.3		c.1193G>T	p.Arg398Leu	missense splice_region	Exon 11 of 17	NP_001341619.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RAF1	ENST00000251849.9	TSL:1 MANE Select	c.1193G>T	p.Arg398Leu	missense splice_region	Exon 11 of 17	ENSP00000251849.4
	RAF1	ENST00000494557.2	TSL:1	n.1004G>T		splice_region non_coding_transcript_exon	Exon 1 of 2
	RAF1	ENST00000442415.7	TSL:5	c.1253G>T	p.Arg418Leu	missense splice_region	Exon 12 of 18	ENSP00000401888.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: reviewed by expert panel

Pathogenic	VUS	Benign	Condition
-	2	-	not provided (2)
1	1	-	RASopathy (2)
-	1	-	LEOPARD syndrome 2;C1969057:Noonan syndrome 5;C4014656:Dilated cardiomyopathy 1NN (1)
1	-	-	Noonan syndrome 5 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.34
CADD	Pathogenic	35
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.92	D
Eigen	Pathogenic	0.75
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.29	D
MetaRNN	Pathogenic	0.91	D
MetaSVM	Uncertain	0.15	D
MutationAssessor	Benign	0.85	L
PhyloP100		7.9
PrimateAI	Pathogenic	0.85	D
PROVEAN	Pathogenic	-6.4	D
REVEL	Pathogenic	0.86
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0020	D
Polyphen		1.0	D
Vest4		0.92
MutPred		0.73		Loss of MoRF binding (P = 0.0144)
MVP		0.98
MPC		2.6
ClinPred		1.0	D
GERP RS		5.2
PromoterAI		-0.014	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.95
gMVP		0.94
Mutation Taster		=32/68	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.97
SpliceAI score (max)		0.080		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs730880382; hg19: chr3-12633207; COSMIC: COSV52583001;