rs121913240

chr12-25227342-T-Achr12-25227342-T-Cchr12-25227342-T-G

Variant summary

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

The NM_004985.5(KRAS):c.182A>T(p.Gln61Leu) 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 Pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q61E) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: KRAS NM_004985.5 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:6
• Conservation: PhyloP100: 8.00

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]

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PM1: In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_004985.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr12-25227343-G-T is described in ClinVar as [Pathogenic]. Clinvar id is 177777.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.895
• PP5: Variant 12-25227342-T-A is Pathogenic according to our data. Variant chr12-25227342-T-A is described in ClinVar as [Pathogenic]. Clinvar id is 45116.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr12-25227342-T-A is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KRAS	NM_033360.4	c.182A>T	p.Gln61Leu	missense_variant	3/6	ENST00000256078.10
KRAS	NM_004985.5	c.182A>T	p.Gln61Leu	missense_variant	3/5	ENST00000311936.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KRAS	ENST00000256078.10	c.182A>T	p.Gln61Leu	missense_variant	3/6	1	NM_033360.4	A1
KRAS	ENST00000311936.8	c.182A>T	p.Gln61Leu	missense_variant	3/5	1	NM_004985.5	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, single submitter

Submissions by phenotype

Non-small cell lung carcinoma Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Nov 02, 2011	- -
Pathogenic, no assertion criteria provided	literature only	Database of Curated Mutations (DoCM)	Oct 02, 2014	- -

Multiple myeloma Pathogenic:1

Likely pathogenic, no assertion criteria provided

clinical testing

Xiao lab, Department of Pathology, Memorial Sloan Kettering Cancer Center

Aug 31, 2019

- -

Medullary thyroid carcinoma Pathogenic:1

Likely pathogenic, no assertion criteria provided

research

Genome Sciences Centre, British Columbia Cancer Agency

Sep 01, 2015

- -

Thyroid tumor Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

Oct 02, 2014

- -

Neoplasm of the large intestine Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

Jul 14, 2015

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.37
Cadd	Pathogenic	29
Dann	Uncertain	1.0
Eigen	Pathogenic	0.89
Eigen_PC	Pathogenic	0.85
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.52	T;T
M_CAP	Pathogenic	0.31	D
MetaRNN	Pathogenic	0.89	D;D
MetaSVM	Uncertain	0.75	D
MutationAssessor	Uncertain	2.9	M;M
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.87	D
PROVEAN	Pathogenic	-6.3	D;D
REVEL	Pathogenic	0.89
Sift	Uncertain	0.0020	D;D
Sift4G	Uncertain	0.0030	D;D
Polyphen		0.98	D;P
Vest4		0.82
MutPred		0.64		Gain of catalytic residue at A59 (P = 0);Gain of catalytic residue at A59 (P = 0);
MVP		0.98
MPC		2.6
ClinPred		1.0	D
GERP RS		5.8
Varity_R		0.97
gMVP		0.93

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs121913240; hg19: chr12-25380276; COSMIC: COSV55504296; COSMIC: COSV55504296;