19-1207077-TG-TGG

Variant names:

• chr19-1207077-T-TG
• rs121913319
• NM_000455.5:c.169dupG

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_000455.5(STK11):​c.169dupG​(p.Glu57GlyfsTer106) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: STK11 NM_000455.5 frameshift
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:4
• Conservation: PhyloP100: -0.486

Genes affected

STK11 (HGNC:11389): (serine/threonine kinase 11) The protein encoded by this gene is a serine/threonine kinase that regulates cell polarity and energy metabolism and functions as a tumor suppressor. Mutations in this gene have been associated with the autosomal dominant Peutz-Jeghers syndrome, as well as with skin, pancreatic, and testicular cancers. [provided by RefSeq, May 2022]

ACMG classification

Verdict is Pathogenic. Variant got 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 19-1207077-T-TG is Pathogenic according to our data. Variant chr19-1207077-T-TG is described in ClinVar as [Likely_pathogenic]. Clinvar id is 93096.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
STK11	NM_000455.5	c.169dupG	p.Glu57GlyfsTer106	frameshift_variant	Exon 1 of 10	ENST00000326873.12	NP_000446.1
STK11	NM_001407255.1	c.169dupG	p.Glu57GlyfsTer106	frameshift_variant	Exon 1 of 9		NP_001394184.1
STK11	NR_176325.1	n.1305dupG		non_coding_transcript_exon_variant	Exon 1 of 11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
STK11	ENST00000326873.12	c.169dupG	p.Glu57GlyfsTer106	frameshift_variant	Exon 1 of 10	1	NM_000455.5	ENSP00000324856.6
STK11	ENST00000652231.1	c.169dupG	p.Glu57GlyfsTer106	frameshift_variant	Exon 1 of 9			ENSP00000498804.1
STK11	ENST00000585748.3	c.-82-11335dupG		intron_variant	Intron 3 of 11	3		ENSP00000477641.2
STK11	ENST00000593219.5	n.169dupG		non_coding_transcript_exon_variant	Exon 1 of 4	3		ENSP00000466610.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Peutz-Jeghers syndrome Pathogenic:2

Jul 15, 2021

Genome-Nilou Lab

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 07, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Glu57Glyfs*106) in the STK11 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in STK11 are known to be pathogenic (PMID: 15188174, 16287113). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with Peutz-Jeghers syndrome (PMID: 9428765, 20435009). ClinVar contains an entry for this variant (Variation ID: 93096). For these reasons, this variant has been classified as Pathogenic. -

not provided Pathogenic:1

May 02, 2013

Eurofins Ntd Llc (ga)

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary cancer-predisposing syndrome Pathogenic:1

Jan 08, 2015

Ambry Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.169dupG pathogenic mutation, located in coding exon 1 of the STK11 gene, results from a duplication of G at position 169, causing a translational frameshift with a predicted alternate stop codon. In one study, this mutation was reported in an individual suspected to have Peutz-Jeghers syndrome (PJS) (Hemminki A et al Nature. 1998 Jan 8;391(6663):184-7). In addition to the clinical data presented in the literature, since frameshifts are typically deleterious in nature, this alteration is interpreted as a disease-causing mutation (ACMG Recommendations for Standards for Interpretation and Reporting of Sequence Variations. Revision 2007. Genet Med. 2008;10:294). -

Computational scores

Source: dbNSFP v4.3

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

Publications

LitVar

Other links and lift over

dbSNP: rs121913319; hg19: chr19-1207076;