chr19-1207036-G-T

Variant names:

• chr19-1207036-G-T
• rs761762690
• NM_000455.5:c.123G>T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_000455.5(STK11):​c.123G>T​(p.Lys41Asn) variant causes a missense 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 Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: STK11 NM_000455.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 1.67

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 Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
STK11	NM_000455.5	c.123G>T	p.Lys41Asn	missense_variant	Exon 1 of 10	ENST00000326873.12	NP_000446.1
STK11	NM_001407255.1	c.123G>T	p.Lys41Asn	missense_variant	Exon 1 of 9		NP_001394184.1
STK11	NR_176325.1	n.1259G>T		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.123G>T	p.Lys41Asn	missense_variant	Exon 1 of 10	1	NM_000455.5	ENSP00000324856.6
STK11	ENST00000652231.1	c.123G>T	p.Lys41Asn	missense_variant	Exon 1 of 9			ENSP00000498804.1
STK11	ENST00000585748.3	c.-82-11381G>T		intron_variant	Intron 3 of 11	3		ENSP00000477641.2
STK11	ENST00000593219.5	n.123G>T		non_coding_transcript_exon_variant	Exon 1 of 4	3		ENSP00000466610.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:2

Sep 29, 2020

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.K41N variant (also known as c.123G>T), located in coding exon 1 of the STK11 gene, results from a G to T substitution at nucleotide position 123. The lysine at codon 41 is replaced by asparagine, an amino acid with similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Mar 10, 2022

Sema4, Sema4

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: curation

- -

Peutz-Jeghers syndrome Uncertain:1

Aug 21, 2018

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces lysine with asparagine at codon 41 of the STK11 protein (p.Lys41Asn). The lysine residue is highly conserved and there is a moderate physicochemical difference between lysine and asparagine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with STK11-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C65"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Benign	0.011	T
BayesDel_noAF	Benign	-0.22
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.39	T;D;T
Eigen	Benign	0.11
Eigen_PC	Benign	0.069
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Uncertain	0.94	D;D;D
M_CAP	Uncertain	0.24	D
MetaRNN	Uncertain	0.48	T;T;T
MetaSVM	Uncertain	-0.096	T
MutationAssessor	Uncertain	2.1	.;M;.
PrimateAI	Pathogenic	0.90	D
PROVEAN	Uncertain	-3.5	.;D;.
REVEL	Uncertain	0.36
Sift	Uncertain	0.029	.;D;.
Sift4G	Uncertain	0.031	D;D;D
Polyphen		0.94	.;P;.
Vest4		0.55
MutPred		0.43		Loss of methylation at K41 (P = 0.0151);Loss of methylation at K41 (P = 0.0151);Loss of methylation at K41 (P = 0.0151);
MVP		0.93
MPC		1.5
ClinPred		0.98	D
GERP RS		1.4
Varity_R		0.45
gMVP		0.81

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

LitVar

Other links and lift over

dbSNP: rs761762690; hg19: chr19-1207035;