rs794727720
Positions:
Variant summary
Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM2PP3_Moderate
The NM_004985.5(KRAS):c.470A>G(p.Tyr157Cys) variant causes a missense change involving the alteration of a conserved nucleotide. 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 Uncertain significance (★★).
Frequency
Genomes: not found (cov: 33)
Consequence
KRAS
NM_004985.5 missense
NM_004985.5 missense
Scores
10
4
1
Clinical Significance
Conservation
PhyloP100: 7.63
Genes affected
KRAS (HGNC:6407): (KRAS proto-oncogene, GTPase) This gene, a Kirsten ras oncogene homolog from the mammalian ras gene family, encodes a protein that is a member of the small GTPase superfamily. A single amino acid substitution is responsible for an activating mutation. The transforming protein that results is implicated in various malignancies, including lung adenocarcinoma, mucinous adenoma, ductal carcinoma of the pancreas and colorectal carcinoma. Alternative splicing leads to variants encoding two isoforms that differ in the C-terminal region. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 6 ACMG points.
PM1
?
In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 4 uncertain in NM_004985.5
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.88
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
KRAS | NM_004985.5 | c.470A>G | p.Tyr157Cys | missense_variant | 5/5 | ENST00000311936.8 | |
KRAS | NM_033360.4 | c.*24A>G | 3_prime_UTR_variant | 6/6 | ENST00000256078.10 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
KRAS | ENST00000311936.8 | c.470A>G | p.Tyr157Cys | missense_variant | 5/5 | 1 | NM_004985.5 | P4 | |
KRAS | ENST00000256078.10 | c.*24A>G | 3_prime_UTR_variant | 6/6 | 1 | NM_033360.4 | A1 |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD3 genomes
?
Cov.:
33
GnomAD4 exome Cov.: 30
GnomAD4 exome
Cov.:
30
GnomAD4 genome ? Cov.: 33
GnomAD4 genome
?
Cov.:
33
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:3
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
not specified Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine | Feb 25, 2015 | The p.Tyr157Cys variant in KRAS has not been previously reported in individuals with Noonan syndrome or in large population studies. Computational prediction to ols and conservation analysis suggest that this variant may impact the protein, though this information is not predictive enough to determine pathogenicity. In summary, the clinical significance of the p.Tyr157Cys variant is uncertain. - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Eurofins Ntd Llc (ga) | Jan 26, 2015 | - - |
RASopathy Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Jul 14, 2022 | 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 are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C65"). ClinVar contains an entry for this variant (Variation ID: 197769). This missense change has been observed in individual(s) with clinical features of KRAS-related conditions (Invitae). This variant is not present in population databases (gnomAD no frequency). This sequence change replaces tyrosine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 157 of the KRAS protein (p.Tyr157Cys). - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Pathogenic
DANN
Uncertain
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
D;D
M_CAP
Pathogenic
D
MetaRNN
Pathogenic
D;D
MetaSVM
Uncertain
D
MutationTaster
Benign
D;D;D
PROVEAN
Pathogenic
D;N
REVEL
Pathogenic
Sift
Pathogenic
D;D
Sift4G
Uncertain
D;D
Polyphen
D;.
Vest4
MutPred
Loss of phosphorylation at Y157 (P = 0.0084);.;
MVP
ClinPred
D
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at