19-49635613-C-T

Position:

• chr19-49635613-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_006270.5(RRAS):​c.620G>A​(p.Arg207Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000468 in 1,281,554 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000047 (0 hom.)
• Consequence: RRAS NM_006270.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.345

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.068453014).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RRAS	NM_006270.5	c.620G>A	p.Arg207Lys	missense_variant	6/6	ENST00000246792.4	NP_006261.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RRAS	ENST00000246792.4	c.620G>A	p.Arg207Lys	missense_variant	6/6	1	NM_006270.5	ENSP00000246792	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000468 AC: 6 AN: 1281554 Hom.: 0 Cov.: 31 AF XY: 0.00000160 AC XY: 1 AN XY: 625526

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000591

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 05, 2021

The p.R207K variant (also known as c.620G>A), located in coding exon 6 of the RRAS gene, results from a G to A substitution at nucleotide position 620. The arginine at codon 207 is replaced by lysine, an amino acid with highly similar properties. This amino acid position is conserved. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.088
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	18
DANN	Benign	0.93
DEOGEN2	Benign	0.24	T
Eigen	Benign	-0.76
Eigen_PC	Benign	-0.50
FATHMM_MKL	Benign	0.62	D
LIST_S2	Benign	0.50	T
M_CAP	Benign	0.014	T
MetaRNN	Benign	0.068	T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	-0.80	N
MutationTaster	Benign	0.78	N
PrimateAI	Uncertain	0.67	T
PROVEAN	Benign	0.52	N
REVEL	Benign	0.075
Sift	Benign	0.83	T
Sift4G	Benign	1.0	T
Polyphen		0.0	B
Vest4		0.097
MutPred		0.30		Gain of methylation at R207 (P = 0.0121);
MVP		0.85
MPC		0.45
ClinPred		0.25	T
GERP RS		4.0
Varity_R		0.070
gMVP		0.38

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-50138870; COSMIC: COSV55868386; COSMIC: COSV55868386;