12-25245347-C-G

Position:

• chr12-25245347-C-G

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1 PM2 PM5 PP3_Moderate PP5

The NM_004985.5(KRAS):​c.38G>C​(p.Gly13Ala) 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 (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G13C) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: KRAS NM_004985.5 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 7.89

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 Likely_pathogenic. Variant got 9 ACMG points.

• PM1: In a chain GTPase KRas, N-terminally processed (size 184) in uniprot entity RASK_HUMAN there are 29 pathogenic changes around while only 0 benign (100%) 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 chr12-25245348-C-A is described in Lovd as [Pathogenic].
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.864
• PP5: Variant 12-25245347-C-G is Pathogenic according to our data. Variant chr12-25245347-C-G is described in ClinVar as [Pathogenic]. Clinvar id is 375967.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KRAS	NM_033360.4	c.38G>C	p.Gly13Ala	missense_variant	2/6	ENST00000256078.10	NP_203524.1
KRAS	NM_004985.5	c.38G>C	p.Gly13Ala	missense_variant	2/5	ENST00000311936.8	NP_004976.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KRAS	ENST00000256078.10	c.38G>C	p.Gly13Ala	missense_variant	2/6	1	NM_033360.4	ENSP00000256078	A1
KRAS	ENST00000311936.8	c.38G>C	p.Gly13Ala	missense_variant	2/5	1	NM_004985.5	ENSP00000308495	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: no assertion criteria provided

Submissions by phenotype

Non-small cell lung carcinoma 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	0.91
BayesDel_addAF	Pathogenic	0.39	D
BayesDel_noAF	Pathogenic	0.32
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.88	.;.;D;.
Eigen	Uncertain	0.51
Eigen_PC	Uncertain	0.61
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.97	D;D;D;D
M_CAP	Benign	0.062	D
MetaRNN	Pathogenic	0.86	D;D;D;D
MetaSVM	Uncertain	0.077	D
MutationAssessor	Benign	1.2	L;.;L;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.89	D
PROVEAN	Pathogenic	-5.0	D;D;D;D
REVEL	Pathogenic	0.77
Sift	Uncertain	0.022	D;T;D;D
Sift4G	Benign	0.079	T;D;T;D
Polyphen		0.56	P;.;P;.
Vest4		0.89
MutPred		0.72		Gain of catalytic residue at A11 (P = 0);Gain of catalytic residue at A11 (P = 0);Gain of catalytic residue at A11 (P = 0);Gain of catalytic residue at A11 (P = 0);
MVP		0.96
MPC		2.7
ClinPred		0.98	D
GERP RS		5.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
Varity_R		0.88
gMVP		0.93

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: rs112445441; hg19: chr12-25398281; COSMIC: COSV55497357;