dbSNP rs61759617: KRAS:c.-122C>T (chr12-25250861-G-A) – ACMG Classification: Benign (-18 pts)

Variant summary

Our verdict is Benign. Variant got -18 ACMG points: 0P and 18B. BP4_ModerateBP6_Very_StrongBS1BS2

The NM_004985.5(KRAS):c.-122C>T variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000889 in 246,296 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0013 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00020 ( 0 hom. )

Consequence

KRAS
NM_004985.5 5_prime_UTR

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: 1.28

Variant links:

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -18 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.45).

BP6

Variant 12-25250861-G-A is Benign according to our data. Variant chr12-25250861-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 177710.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00132 (200/151514) while in subpopulation AFR AF= 0.00469 (194/41342). AF 95% confidence interval is 0.00415. There are 1 homozygotes in gnomad4. There are 96 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High AC in GnomAd4 at 200 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KRAS	NM_004985.5 link	c.-122C>T		5_prime_UTR_variant	Exon 1 of 5	ENST00000311936.8	NP_004976.2	P01116-2A0A024RAV5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KRAS	ENST00000311936.8 link	c.-122C>T		5_prime_UTR_variant	Exon 1 of 5	1	NM_004985.5	ENSP00000308495.3		P01116-2

Frequencies

GnomAD3 genomes

AF:

0.00131

AC:

199

AN:

151402

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00468

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000263

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000196

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000482

GnomAD4 exome

AF:

0.000200

AC:

AN:

94782

Hom.:

Cov.:

AF XY:

0.000178

AC XY:

AN XY:

50552

show subpopulations

Gnomad4 AFR exome

AF:

0.00266

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000389

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000322

Gnomad4 OTH exome

AF:

0.000762

GnomAD4 genome

AF:

0.00132

AC:

200

AN:

151514

Hom.:

Cov.:

AF XY:

0.00130

AC XY:

AN XY:

74034

show subpopulations

Gnomad4 AFR

AF:

0.00469

Gnomad4 AMR

AF:

0.000262

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000196

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000477

Alfa

AF:

0.000854

Hom.:

Bravo

AF:

0.00146

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

Oct 20, 2011

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant has been reported in dbSNP in 1/20 (5%) Black individuals (rs617596 17). In addition, this variant occurs in the 5' UTR of the gene and even though mutations in 5' UTRs of genes have been shown to affect gene regulation, no pat hogenic mutations in the 5' UTR of KRAS have been reported to date. Therefore, t his variant is not expected to have clinical significance. -

not provided

Benign:1

Breakthrough Genomics, Breakthrough Genomics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.45

CADD

Benign

DANN

Uncertain

0.97

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.1

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over