11-534289-C-G

Position:

• chr11-534289-C-G

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1 PM2 PM5 PP3_Moderate PP5_Moderate

The ENST00000311189.8(HRAS):​c.34G>C​(p.Gly12Arg) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G12S) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 34)
• Consequence: HRAS ENST00000311189.8 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 6.09

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:):

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PM1: In a strand (size 3) in uniprot entity RASH_HUMAN there are 27 pathogenic changes around while only 1 benign (96%) in ENST00000311189.8
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr11-534289-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 12602.Status of the report is reviewed_by_expert_panel, 3 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.899
• PP5: Variant 11-534289-C-G is Pathogenic according to our data. Variant chr11-534289-C-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 375961.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HRAS	NM_005343.4	c.34G>C	p.Gly12Arg	missense_variant	2/6	ENST00000311189.8	NP_005334.1
HRAS	NM_176795.5	c.34G>C	p.Gly12Arg	missense_variant	2/6	ENST00000417302.7	NP_789765.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HRAS	ENST00000311189.8	c.34G>C	p.Gly12Arg	missense_variant	2/6	1	NM_005343.4	ENSP00000309845	P1
HRAS	ENST00000417302.7	c.34G>C	p.Gly12Arg	missense_variant	2/6	5	NM_176795.5	ENSP00000388246

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 34

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Costello syndrome Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Apr 25, 2022

Variant summary: HRAS c.34G>C (p.Gly12Arg) results in a non-conservative amino acid change located in the Small GTP-binding protein domain of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 250294 control chromosomes. c.34G>C has been reported in the literature in at least one individual with precocious puberty in mosaic state and in a large number of tumor samples in somatic state. At least one publication reports experimental evidence evaluating an impact on protein function and showed that this variant resulted in increased potency in focus induction and cell growth. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant in germline to ClinVar after 2014. However, many other variants affecting Gly12 have been classified as pathgoenic by our laboratories and other clinical laboratories. Based on the evidence outlined above, the variant was classified as likely pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.33	D
BayesDel_noAF	Pathogenic	0.24
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.86	.;D;.;D;D
Eigen	Uncertain	0.29
Eigen_PC	Benign	0.17
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Pathogenic	0.29	D
MetaRNN	Pathogenic	0.90	D;D;D;D;D
MetaSVM	Uncertain	0.11	D
MutationAssessor	Uncertain	2.8	M;M;M;M;M
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-6.2	D;D;D;D;D
REVEL	Pathogenic	0.76
Sift	Uncertain	0.019	D;D;D;D;D
Sift4G	Uncertain	0.0040	D;D;D;D;D
Polyphen		0.85	P;P;P;P;P
Vest4		0.52
MutPred		0.83		Gain of MoRF binding (P = 0.0105);Gain of MoRF binding (P = 0.0105);Gain of MoRF binding (P = 0.0105);Gain of MoRF binding (P = 0.0105);Gain of MoRF binding (P = 0.0105);
MVP		0.95
MPC		2.0
ClinPred		1.0	D
GERP RS		3.0
Varity_R		0.90
gMVP		0.98

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: rs104894229; hg19: chr11-534289; COSMIC: COSV54236795; COSMIC: COSV54236795;