rs864622488

Variant names:

• chr19-1222987-G-A
• rs864622488
• NM_000455.5:c.923G>A

Your query was ambiguous. Multiple possible variants found:

• chr19-1222987-G-A
• chr19-1222987-G-C
• chr19-1222987-G-T

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.923G>A​(p.Trp308*) variant causes a stop gained, splice region 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 (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 33)
• Consequence: STK11 NM_000455.5 stop_gained, splice_region
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:5
• Conservation: PhyloP100: 9.60

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 19-1222987-G-A is Pathogenic according to our data. Variant chr19-1222987-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 492567.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr19-1222987-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
STK11	NM_000455.5	c.923G>A	p.Trp308*	stop_gained, splice_region_variant	Exon 8 of 10	ENST00000326873.12	NP_000446.1
STK11	NM_001407255.1	c.923G>A	p.Trp308*	stop_gained, splice_region_variant	Exon 8 of 9		NP_001394184.1
STK11	NR_176325.1	n.2190G>A		splice_region_variant, non_coding_transcript_exon_variant	Exon 9 of 11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
STK11	ENST00000326873.12	c.923G>A	p.Trp308*	stop_gained, splice_region_variant	Exon 8 of 10	1	NM_000455.5	ENSP00000324856.6
STK11	ENST00000652231.1	c.923G>A	p.Trp308*	stop_gained, splice_region_variant	Exon 8 of 9			ENSP00000498804.1
STK11	ENST00000585748.3	c.551G>A	p.Trp184*	stop_gained, splice_region_variant	Exon 10 of 12	3		ENSP00000477641.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hereditary cancer-predisposing syndrome Pathogenic:2

Sep 06, 2023

Ambry Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.W308* pathogenic mutation (also known as c.923G>A), located in coding exon 8 of the STK11 gene, results from a G to A substitution at nucleotide position 923. This changes the amino acid from a tryptophan to a stop codon within coding exon 8. This alteration has been observed in multiple individuals with a personal and/or family history that is consistent with STK11-related disease (Ylikorkala A et al. Hum Mol Genet, 1999 Jan;8:45-51; Chiang JM et al. Asian J Surg, 2018 Sep;41:480-485; Wu BD et al. Biomed Res Int, 2020 May;2020:9159315; Ambry internal data). In addition to the clinical data presented in the literature, this alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. As such, this alteration is interpreted as a disease-causing mutation. -

Apr 26, 2021

Color Diagnostics, LLC DBA Color Health

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant changes 1 nucleotide in exon 8 of the STK11 gene, creating a premature translation stop signal at codon 308 of the STK11 protein. This variant is expected to result in an absent or non-functional protein product. This variant has been reported in individuals affected with Peutz–Jeghers polyposis syndrome (PMID: 9887330, 20497868, 28869103, 30092773). This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). Loss of STK11 function is a known mechanism of disease (clinicalgenome.org). Based on the available evidence, this variant is classified as Pathogenic. -

Peutz-Jeghers syndrome Pathogenic:2

Jul 15, 2021

Genome-Nilou Lab

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 15, 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.Trp308*) 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: 9887330, 28869103, 32462036). ClinVar contains an entry for this variant (Variation ID: 492567). For these reasons, this variant has been classified as Pathogenic. -

not provided Pathogenic:1

Aug 14, 2019

Clinical Genetics and Genomics, Karolinska University Hospital

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.62	D
BayesDel_noAF	Pathogenic	0.58
CADD	Pathogenic	55
DANN	Uncertain	1.0
Eigen	Pathogenic	0.76
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Uncertain	0.84	D
Vest4		0.83
GERP RS		3.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.48		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.48		Position offset: 2

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

Publications

LitVar

Other links and lift over

dbSNP: rs864622488; hg19: chr19-1222986;