11-533490-C-T

Position:

• chr11-533490-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1 PM2

The NM_005343.4(HRAS):​c.413G>A​(p.Gly138Asp) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,302 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: HRAS NM_005343.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.89

Genes affected

HRAS (HGNC:5173): (HRas proto-oncogene, GTPase) This gene belongs to the Ras oncogene family, whose members are related to the transforming genes of mammalian sarcoma retroviruses. The products encoded by these genes function in signal transduction pathways. These proteins can bind GTP and GDP, and they have intrinsic GTPase activity. This protein undergoes a continuous cycle of de- and re-palmitoylation, which regulates its rapid exchange between the plasma membrane and the Golgi apparatus. Mutations in this gene cause Costello syndrome, a disease characterized by increased growth at the prenatal stage, growth deficiency at the postnatal stage, predisposition to tumor formation, cognitive disability, skin and musculoskeletal abnormalities, distinctive facial appearance and cardiovascular abnormalities. Defects in this gene are implicated in a variety of cancers, including bladder cancer, follicular thyroid cancer, and oral squamous cell carcinoma. Multiple transcript variants, which encode different isoforms, have been identified for this gene. [provided by RefSeq, Jul 2008]

LRRC56 (HGNC:25430): (leucine rich repeat containing 56) Predicted to be involved in cell projection organization. Predicted to be located in cilium. Implicated in primary ciliary dyskinesia 39. [provided by Alliance of Genome Resources, Apr 2022]

HRAS (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a chain GTPase HRas, N-terminally processed (size 184) in uniprot entity RASH_HUMAN there are 12 pathogenic changes around while only 2 benign (86%) in NM_005343.4
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HRAS	NM_005343.4	c.413G>A	p.Gly138Asp	missense_variant	4/6	ENST00000311189.8	NP_005334.1
HRAS	NM_176795.5	c.413G>A	p.Gly138Asp	missense_variant	4/6	ENST00000417302.7	NP_789765.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HRAS	ENST00000311189.8	c.413G>A	p.Gly138Asp	missense_variant	4/6	1	NM_005343.4	ENSP00000309845.7
HRAS	ENST00000417302.7	c.413G>A	p.Gly138Asp	missense_variant	4/6	5	NM_176795.5	ENSP00000388246.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461302 Hom.: 0 Cov.: 35 AF XY: 0.00000275 AC XY: 2 AN XY: 726978

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.0000383

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000180

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Costello syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 13, 2018

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. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C65"). This variant has not been reported in the literature in individuals with HRAS-related disease. ClinVar contains an entry for this variant (Variation ID: 462151). This variant is not present in population databases (ExAC no frequency). This sequence change replaces glycine with aspartic acid at codon 138 of the HRAS protein (p.Gly138Asp). The glycine residue is highly conserved and there is a moderate physicochemical difference between glycine and aspartic acid. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.35
BayesDel_addAF	Uncertain	0.057	T
BayesDel_noAF	Benign	-0.16
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.87	.;D;.;D;D
Eigen	Benign	0.095
Eigen_PC	Benign	0.093
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Uncertain	0.10	D
MetaRNN	Uncertain	0.61	D;D;D;D;D
MetaSVM	Uncertain	-0.16	T
MutationAssessor	Uncertain	2.2	M;M;M;M;M
PrimateAI	Pathogenic	0.81	D
PROVEAN	Uncertain	-4.4	D;D;D;D;D
REVEL	Uncertain	0.45
Sift	Uncertain	0.016	D;D;D;D;D
Sift4G	Uncertain	0.041	D;D;D;D;D
Polyphen		0.30	B;B;B;B;B
Vest4		0.69
MutPred		0.57		Gain of solvent accessibility (P = 0.0354);Gain of solvent accessibility (P = 0.0354);Gain of solvent accessibility (P = 0.0354);Gain of solvent accessibility (P = 0.0354);Gain of solvent accessibility (P = 0.0354);
MVP		0.87
MPC		1.6
ClinPred		0.98	D
GERP RS		4.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.84
gMVP		0.55

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

Publications

LitVar

Other links and lift over

dbSNP: rs1554884772; hg19: chr11-533490;