rs727503107

Positions:

• chr12-25227296-C-A
• chr12-25227296-C-G
• chr12-25227296-C-T

Variant summary

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

The NM_004985.5(KRAS):​c.228G>T​(p.Glu76Asp) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: KRAS NM_004985.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.03

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]

KRAS (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KRAS	NM_004985.5	c.228G>T	p.Glu76Asp	missense_variant	3/5	ENST00000311936.8	NP_004976.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KRAS	ENST00000311936.8	c.228G>T	p.Glu76Asp	missense_variant	3/5	1	NM_004985.5	ENSP00000308495.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.60
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.010
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.81	.;D
Eigen	Benign	-0.26
Eigen_PC	Benign	-0.00093
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.71	T;T
M_CAP	Benign	0.045	D
MetaRNN	Uncertain	0.56	D;D
MetaSVM	Benign	-0.87	T
MutationAssessor	Benign	-0.96	N;N
PrimateAI	Pathogenic	0.86	D
PROVEAN	Uncertain	-2.7	D;D
REVEL	Uncertain	0.42
Sift	Benign	0.032	D;D
Sift4G	Benign	0.21	T;T
Polyphen		0.019	B;B
Vest4		0.69
MutPred		0.57		Gain of catalytic residue at C80 (P = 0.0048);Gain of catalytic residue at C80 (P = 0.0048);
MVP		0.81
MPC		1.4
ClinPred		0.91	D
GERP RS		4.9
Varity_R		0.92
gMVP		0.83

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: chr12-25380230;