19-1219348-G-T

Variant names:

• chr19-1219348-G-T
• rs757021648
• NM_000455.5:c.399G>T

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP6 BS2

The NM_000455.5(STK11):​c.399G>T​(p.Val133Val) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000625 in 1,439,438 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. V133V) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000063 (0 hom.)
• Consequence: STK11 NM_000455.5 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:1
• Conservation: PhyloP100: 1.75

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 Likely_benign. Variant got -5 ACMG points.

• BP6: Variant 19-1219348-G-T is Benign according to our data. Variant chr19-1219348-G-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 793720.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1}.
• BS2: High AC in GnomAdExome4 at 9 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
STK11	NM_000455.5	c.399G>T	p.Val133Val	synonymous_variant	Exon 3 of 10	ENST00000326873.12	NP_000446.1
STK11	NM_001407255.1	c.399G>T	p.Val133Val	synonymous_variant	Exon 3 of 9		NP_001394184.1
STK11	NR_176325.1	n.1666G>T		non_coding_transcript_exon_variant	Exon 4 of 11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
STK11	ENST00000326873.12	c.399G>T	p.Val133Val	synonymous_variant	Exon 3 of 10	1	NM_000455.5	ENSP00000324856.6
STK11	ENST00000652231.1	c.399G>T	p.Val133Val	synonymous_variant	Exon 3 of 9			ENSP00000498804.1
STK11	ENST00000585748.3	c.27G>T	p.Val9Val	synonymous_variant	Exon 5 of 12	3		ENSP00000477641.2
STK11	ENST00000593219.5	n.*224G>T		non_coding_transcript_exon_variant	Exon 4 of 4	3		ENSP00000466610.1
STK11	ENST00000593219.5	n.*224G>T		3_prime_UTR_variant	Exon 4 of 4	3		ENSP00000466610.1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 0.00000625 AC: 9 AN: 1439438 Hom.: 0 Cov.: 36 AF XY: 0.00000700 AC XY: 5 AN XY: 714212

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000817

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 34

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Uncertain:1

Dec 20, 2023

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The STK11 c.399G>T (p.Val133=) synonymous variant has been identified in reportedly healthy individuals (PMID: 30287823 (2018), 36243179 (2022)). The frequency of this variant in the general population, 0.000014 (3/221374 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Analysis of this variant using software algorithms for the prediction of the effect of nucleotide changes on splicing yielded predictions that this variant does not affect STK11 mRNA splicing. Based on the available information, we are unable to determine the clinical significance of this variant. -

Peutz-Jeghers syndrome Benign:1

Nov 07, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.46
CADD	Benign	14
DANN	Benign	0.66

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.25		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.25		Position offset: 13

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

Publications

LitVar

Other links and lift over

dbSNP: rs757021648; hg19: chr19-1219347;