NM_004985.5:c.-178C>A

Variant names:

Variant summary

Our verdict is Benign. The variant received -7 ACMG points: 0P and 7B. BP4_ModerateBS1_SupportingBS2

The NM_004985.5(KRAS):c.-178C>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0018 in 250,866 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 Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0027 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00041 ( 0 hom. )

Consequence

KRAS
NM_004985.5 5_prime_UTR

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.493

Publications

3 publications found

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 Gene-Disease associations (from GenCC):

cardiofaciocutaneous syndrome 2
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp, Ambry Genetics, PanelApp Australia
Noonan syndrome
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
Noonan syndrome 3
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, PanelApp Australia, Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
cardiofaciocutaneous syndrome
Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen
linear nevus sebaceous syndrome
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
Costello syndrome
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

KRAS links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -7 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.28).

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0027 (410/151978) while in subpopulation AFR AF = 0.0092 (382/41512). AF 95% confidence interval is 0.00844. There are 1 homozygotes in GnomAd4. There are 202 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High AC in GnomAd4 at 410 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KRAS	NM_004985.5 link	c.-178C>A		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.-178C>A		5_prime_UTR_variant	Exon 1 of 5	1	NM_004985.5	ENSP00000308495.3		P01116-2

Frequencies

GnomAD3 genomes

AF:

0.00268

AC:

407

AN:

151872

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00916

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00164

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.000957

GnomAD4 exome

AF:

0.000415

AC:

AN:

98888

Hom.:

Cov.:

AF XY:

0.000359

AC XY:

AN XY:

52902

show subpopulations

African (AFR)

AF:

0.00886

AC:

AN:

3272

American (AMR)

AF:

0.00140

AC:

AN:

2146

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

4350

East Asian (EAS)

AF:

0.00

AC:

AN:

10866

South Asian (SAS)

AF:

0.00

AC:

AN:

4008

European-Finnish (FIN)

AF:

0.00

AC:

AN:

1508

Middle Eastern (MID)

AF:

0.00

AC:

AN:

534

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

65326

Other (OTH)

AF:

0.00131

AC:

AN:

6878

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.548

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00270

AC:

410

AN:

151978

Hom.:

Cov.:

AF XY:

0.00272

AC XY:

202

AN XY:

74304

show subpopulations

African (AFR)

AF:

0.00920

AC:

382

AN:

41512

American (AMR)

AF:

0.00164

AC:

AN:

15240

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3464

East Asian (EAS)

AF:

0.00

AC:

AN:

5162

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10570

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67892

Other (OTH)

AF:

0.000947

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

106

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00328

Asia WGS

AF:

0.000293

AC:

AN:

3432

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 24, 2010

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant classified as Uncertain Significance - Favor Benign. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.28

CADD

Benign

(source)

DANN

Benign

0.93

PhyloP100

0.49

PromoterAI

-0.00070

Neutral

(source)

Mutation Taster

=299/1

polymorphism

(source)

Splicing

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over