dbSNP rs397517043: KRAS:p.Lys178del (chr12-25209828-TTTC-T) – ACMG Classification: Benign (-15 pts)

Variant summary

Our verdict is Benign. The variant received -15 ACMG points: 1P and 16B. PM4_SupportingBP6_Very_StrongBS1BS2

The NM_004985.5(KRAS):c.531_533delGAA(p.Lys178del) variant causes a disruptive inframe deletion change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00108 in 1,610,758 control chromosomes in the GnomAD database, including 2 homozygotes. Variant has been reported in ClinVar as Benign (★★★).

Frequency

Genomes: 𝑓 0.00068 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0011 ( 2 hom. )

Consequence

KRAS
NM_004985.5 disruptive_inframe_deletion

Scores

Not classified

Clinical Significance

Benign reviewed by expert panel B:13O:1

Conservation

PhyloP100: 7.63

Publications

6 publications found

Variant links:

COSMIC-nc: COSV55622733

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:

ETFRF1 (HGNC:27052): (electron transfer flavoprotein regulatory factor 1) Involved in respiratory electron transport chain. Located in mitochondrion. [provided by Alliance of Genome Resources, Apr 2022]

ETFRF1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -15 ACMG points.

PM4

Nonframeshift variant in NON repetitive region in NM_004985.5. Strenght limited to Supporting due to length of the change: 1aa.

BP6

Variant 12-25209828-TTTC-T is Benign according to our data. Variant chr12-25209828-TTTC-T is described in ClinVar as Benign. ClinVar VariationId is 45129.Status of the report is reviewed_by_expert_panel, 3 stars.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000683 (104/152298) while in subpopulation NFE AF = 0.00126 (86/67992). AF 95% confidence interval is 0.00105. There are 0 homozygotes in GnomAd4. There are 36 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High AC in GnomAd4 at 104 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004985.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
KRAS	NM_004985.5	MANE Select	c.531_533delGAA	p.Lys178del	disruptive_inframe_deletion	Exon 5 of 5	NP_004976.2
KRAS	NM_033360.4	MANE Plus Clinical	c.85_87delGAA		3_prime_UTR	Exon 6 of 6	NP_203524.1	P01116-1
KRAS	NM_001369787.1		c.531_533delGAA	p.Lys178del	disruptive_inframe_deletion	Exon 5 of 5	NP_001356716.1	P01116-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
KRAS	ENST00000311936.8	TSL:1 MANE Select	c.531_533delGAA	p.Lys178del	disruptive_inframe_deletion	Exon 5 of 5	ENSP00000308495.3	P01116-2
KRAS	ENST00000256078.10	TSL:1 MANE Plus Clinical	c.85_87delGAA		3_prime_UTR	Exon 6 of 6	ENSP00000256078.5	P01116-1
KRAS	ENST00000685328.1		c.531_533delGAA	p.Lys178del	disruptive_inframe_deletion	Exon 5 of 5	ENSP00000508921.1	P01116-2

Frequencies

GnomAD3 genomes

AF:

0.000683

AC:

104

AN:

152180

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000386

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00126

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000573

AC:

143

AN:

249744

AF XY:

0.000578

show subpopulations

Gnomad AFR exome

AF:

0.000497

Gnomad AMR exome

AF:

0.000233

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000164

Gnomad FIN exome

AF:

0.0000927

Gnomad NFE exome

AF:

0.00105

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.00112

AC:

1628

AN:

1458460

Hom.:

AF XY:

0.00109

AC XY:

788

AN XY:

725740

show subpopulations

African (AFR)

AF:

0.000450

AC:

AN:

33350

American (AMR)

AF:

0.000179

AC:

AN:

44586

Ashkenazi Jewish (ASJ)

AF:

0.0000384

AC:

AN:

26068

East Asian (EAS)

AF:

0.000101

AC:

AN:

39524

South Asian (SAS)

AF:

0.0000581

AC:

AN:

86016

European-Finnish (FIN)

AF:

0.000112

AC:

AN:

53344

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5740

European-Non Finnish (NFE)

AF:

0.00140

AC:

1551

AN:

1109586

Other (OTH)

AF:

0.000631

AC:

AN:

60246

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

169

254

338

423

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

132

198

264

330

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000683

AC:

104

AN:

152298

Hom.:

Cov.:

AF XY:

0.000483

AC XY:

AN XY:

74480

show subpopulations

African (AFR)

AF:

0.000385

AC:

AN:

41578

American (AMR)

AF:

0.0000653

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.000193

AC:

AN:

5194

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00126

AC:

AN:

67992

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.509

Heterozygous variant carriers

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:

0.00102

Hom.:

Bravo

AF:

0.000665

EpiCase

AF:

0.000929

EpiControl

AF:

0.000949

ClinVar

ClinVar submissions

Significance:Benign

Revision:reviewed by expert panel

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (7)

RASopathy (2)

Cardiovascular phenotype (1)

KRAS-related disorder (1)

Noonan syndrome and Noonan-related syndrome (1)

not specified (2)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

PhyloP100

7.6

Mutation Taster

=30/70

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over