19-49635579-C-A

Variant names:

• chr19-49635579-C-A
• NM_006270.5:c.654G>T
• RRAS p.Leu218Leu

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The NM_006270.5(RRAS):​c.654G>T​(p.Leu218Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. L218L) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: RRAS NM_006270.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.584
• Publications: 0 publications found

Genes affected

RRAS (HGNC:10447): (RAS related) The protein encoded by this gene is a small GTPase involved in diverse processes including angiogenesis, vascular homeostasis and regeneration, cell adhesion, and neuronal axon guidance. Mutations in this gene are found in many invasive cancers. [provided by RefSeq, Jul 2015]

RRAS Gene-Disease associations (from GenCC):

• Noonan syndrome and Noonan-related syndrome

  Inheritance: AD Classification: STRONG Submitted by: G2P
• Noonan syndrome

  Inheritance: AD Classification: MODERATE, LIMITED Submitted by: Genomics England PanelApp, PanelApp Australia, ClinGen
• cardiofaciocutaneous syndrome

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

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
• Noonan syndrome with multiple lentigines

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
• Noonan syndrome-like disorder with loose anagen hair

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.37).
• BP7: Synonymous conserved (PhyloP=0.584 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006270.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RRAS	NM_006270.5	MANE Select	c.654G>T	p.Leu218Leu	synonymous	Exon 6 of 6	NP_006261.1	P10301

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RRAS	ENST00000246792.4	TSL:1 MANE Select	c.654G>T	p.Leu218Leu	synonymous	Exon 6 of 6	ENSP00000246792.2	P10301
	RRAS	ENST00000962270.1		c.693G>T	p.Leu231Leu	synonymous	Exon 7 of 7	ENSP00000632329.1
	RRAS	ENST00000928399.1		c.663G>T	p.Leu221Leu	synonymous	Exon 6 of 6	ENSP00000598458.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1287878 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 627576

African (AFR) AF: 0.00 AC: 0 AN: 27964

American (AMR) AF: 0.00 AC: 0 AN: 24712

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 17960

East Asian (EAS) AF: 0.00 AC: 0 AN: 34634

South Asian (SAS) AF: 0.00 AC: 0 AN: 57978

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 47468

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4804

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1020124

Other (OTH) AF: 0.00 AC: 0 AN: 52234

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.37
CADD	Benign	9.8
DANN	Benign	0.70
PhyloP100		0.58

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr19-50138836;