12-25205716-A-C

Variant names:

• chr12-25205716-A-C
• rs12245
• NM_033360.4:c.*4200T>G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_033360.4(KRAS):​c.*4200T>G variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: KRAS NM_033360.4 3_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.02
• Publications: 21 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]

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]

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.71).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_033360.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRAS	NM_033360.4	MANE Plus Clinical	c.*4200T>G		3_prime_UTR	Exon 6 of 6	NP_203524.1
	KRAS	NM_004985.5	MANE Select	c.*4079T>G		3_prime_UTR	Exon 5 of 5	NP_004976.2
	KRAS	NM_001369786.1		c.*4200T>G		3_prime_UTR	Exon 6 of 6	NP_001356715.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRAS	ENST00000256078.10	TSL:1 MANE Plus Clinical	c.*4200T>G		3_prime_UTR	Exon 6 of 6	ENSP00000256078.5
	KRAS	ENST00000311936.8	TSL:1 MANE Select	c.*4079T>G		3_prime_UTR	Exon 5 of 5	ENSP00000308495.3
	KRAS	ENST00000686877.1		n.*4617T>G		non_coding_transcript_exon	Exon 6 of 6	ENSP00000510431.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 71156 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 32896

African (AFR) AF: 0.00 AC: 0 AN: 3442

American (AMR) AF: 0.00 AC: 0 AN: 2142

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 4506

East Asian (EAS) AF: 0.00 AC: 0 AN: 10078

South Asian (SAS) AF: 0.00 AC: 0 AN: 598

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 92

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 448

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 43898

Other (OTH) AF: 0.00 AC: 0 AN: 5952

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.71
CADD	Benign	9.8
DANN	Benign	0.59
PhyloP100		2.0
Mutation Taster		=100/0	polymorphism

Splicing

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

Other links and lift over

dbSNP: rs12245; hg19: chr12-25358650;