rs121913535

Variant names:

• chr12-25245348-C-A
• rs121913535
• NM_033360.4:c.37G>T

Your query was ambiguous. Multiple possible variants found:

• chr12-25245348-C-A
• chr12-25245348-C-G
• chr12-25245348-C-T

Variant summary

Our verdict is Pathogenic. The variant received 21 ACMG points: 21P and 0B. PS3 PM1 PM2 PM5 PP2 PP3_Moderate PP5_Very_Strong

The NM_004985.5(KRAS):​c.37G>T​(p.Gly13Cys) 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 Likely pathogenic (★★). ClinVar reports functional evidence for this variant: "SCV000808492: Published functional studies demonstrate that this variant causes increased RAS activation (Niemela et al., 2011)" and additional evidence is available in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G13D) has been classified as Pathogenic. The gene KRAS is included in the ClinGen Criteria Specification Registry.

• Frequency: Genomes: not found (cov: 32)
• Consequence: KRAS NM_004985.5 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:8
• Conservation: PhyloP100: 7.89
• Publications: 758 publications found

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: G2P, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Ambry Genetics
• Noonan syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• Noonan syndrome 3

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Genomics England PanelApp, G2P
• 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
• Noonan syndrome with multiple lentigines

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
• Noonan syndrome-like disorder with loose anagen hair

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Specifications for KRAS are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Pathogenic. The variant received 21 ACMG points.

• PS3: PS3 evidence extracted from ClinVar submissions: SCV000808492: Published functional studies demonstrate that this variant causes increased RAS activation (Niemela et al., 2011); PMID: 19661383; SCV004046132: Cells transfected with a plasmid-encoding mutant G13C showed an increased amount of active RAS versus wild-type KRAS suggesting a gain-of-function effect (PMID: 21079152).
• PM1: In a hotspot region, there are 17 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 14 uncertain 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 chr12-25245347-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 12580.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 65 curated pathogenic missense variants (we use a threshold of 10). The gene has 3 curated benign missense variants. Gene score misZ: 2.3177 (below the threshold of 3.09). Trascript score misZ: 3.0857 (below the threshold of 3.09). GenCC associations: The gene is linked to Noonan syndrome with multiple lentigines, cardiofaciocutaneous syndrome, linear nevus sebaceous syndrome, Noonan syndrome-like disorder with loose anagen hair, Costello syndrome, cardiofaciocutaneous syndrome 2, Noonan syndrome 3, Noonan syndrome.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.92
• PP5: Variant 12-25245348-C-A is Pathogenic according to our data. Variant chr12-25245348-C-A is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 45123.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRAS	NM_033360.4	MANE Plus Clinical	c.37G>T	p.Gly13Cys	missense	Exon 2 of 6	NP_203524.1	P01116-1
	KRAS	NM_004985.5	MANE Select	c.37G>T	p.Gly13Cys	missense	Exon 2 of 5	NP_004976.2
	KRAS	NM_001369786.1		c.37G>T	p.Gly13Cys	missense	Exon 2 of 6	NP_001356715.1	P01116-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRAS	ENST00000256078.10	TSL:1 MANE Plus Clinical	c.37G>T	p.Gly13Cys	missense	Exon 2 of 6	ENSP00000256078.5	P01116-1
	KRAS	ENST00000311936.8	TSL:1 MANE Select	c.37G>T	p.Gly13Cys	missense	Exon 2 of 5	ENSP00000308495.3	P01116-2
	KRAS	ENST00000556131.2	TSL:1	c.37G>T	p.Gly13Cys	missense	Exon 2 of 3	ENSP00000451856.1	G3V4K2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00 AC: 0 AN: 249408 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
3	-	-	Autoimmune lymphoproliferative syndrome type 4 (3)
3	-	-	not provided (3)
1	-	-	KRAS-related disorder (1)
1	-	-	Non-small cell lung carcinoma (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.44	D
BayesDel_noAF	Pathogenic	0.39
CADD	Pathogenic	30
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.91	D
Eigen	Pathogenic	0.94
Eigen_PC	Pathogenic	0.90
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.88	D
M_CAP	Uncertain	0.21	D
MetaRNN	Pathogenic	0.92	D
MetaSVM	Uncertain	0.69	D
MutationAssessor	Uncertain	2.3	M
PhyloP100		7.9
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-7.6	D
REVEL	Pathogenic	0.87
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.011	D
Polyphen		1.0	D
Vest4		0.94
MutPred		0.74		Gain of catalytic residue at S17 (P = 0)
MVP		0.98
MPC		2.8
ClinPred		1.0	D
GERP RS		5.7
Varity_R		0.96
gMVP		0.98
Mutation Taster		=0/100	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs121913535; hg19: chr12-25398282; COSMIC: COSV55497378;