NM_005343.4:c.302A>C

Variant names:

• chr11-533601-T-G
• NM_005343.4:c.302A>C

Variant summary

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

The NM_005343.4(HRAS):​c.302A>C​(p.Lys101Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,506 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: HRAS NM_005343.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.69

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]

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 rank	MANE	Protein	UniProt
HRAS	NM_005343.4	c.302A>C	p.Lys101Thr	missense_variant	Exon 4 of 6	ENST00000311189.8	NP_005334.1
HRAS	NM_176795.5	c.302A>C	p.Lys101Thr	missense_variant	Exon 4 of 6	ENST00000417302.7	NP_789765.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HRAS	ENST00000311189.8	c.302A>C	p.Lys101Thr	missense_variant	Exon 4 of 6	1	NM_005343.4	ENSP00000309845.7
HRAS	ENST00000417302.7	c.302A>C	p.Lys101Thr	missense_variant	Exon 4 of 6	5	NM_176795.5	ENSP00000388246.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461506 Hom.: 0 Cov.: 35 AF XY: 0.00000138 AC XY: 1 AN XY: 727074

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.56
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.070
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.64	.;D;.;D;D
Eigen	Benign	0.11
Eigen_PC	Benign	0.14
FATHMM_MKL	Pathogenic	0.98	D
M_CAP	Uncertain	0.096	D
MetaRNN	Uncertain	0.55	D;D;D;D;D
MetaSVM	Benign	-0.47	T
MutationAssessor	Benign	0.80	N;N;N;N;N
PrimateAI	Pathogenic	0.80	T
PROVEAN	Uncertain	-3.0	D;D;D;D;D
REVEL	Uncertain	0.44
Sift	Benign	0.13	T;T;T;T;T
Sift4G	Benign	0.12	T;T;T;T;T
Polyphen		0.14	B;P;B;P;P
Vest4		0.67
MutPred		0.50		Loss of ubiquitination at K101 (P = 0.0255);Loss of ubiquitination at K101 (P = 0.0255);Loss of ubiquitination at K101 (P = 0.0255);Loss of ubiquitination at K101 (P = 0.0255);Loss of ubiquitination at K101 (P = 0.0255);
MVP		0.75
MPC		1.5
ClinPred		0.86	D
GERP RS		3.5
Varity_R		0.69
gMVP		0.64

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr11-533601;