chr19-1226502-T-C

Position:

• chr19-1226502-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The ENST00000326873.12(STK11):​c.1157T>C​(p.Leu386Pro) variant causes a missense 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. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L386R) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: STK11 ENST00000326873.12 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.07

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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.13834473).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
STK11	NM_000455.5	c.1157T>C	p.Leu386Pro	missense_variant	9/10	ENST00000326873.12	NP_000446.1
STK11	NR_176325.1	n.2424T>C		non_coding_transcript_exon_variant	10/11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
STK11	ENST00000326873.12	c.1157T>C	p.Leu386Pro	missense_variant	9/10	1	NM_000455.5	ENSP00000324856	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Peutz-Jeghers syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 30, 2019

Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The proline amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with STK11-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces leucine with proline at codon 386 of the STK11 protein (p.Leu386Pro). The leucine residue is moderately conserved and there is a moderate physicochemical difference between leucine and proline. 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	Benign	0.077
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.44
CADD	Benign	19
DANN	Benign	0.97
DEOGEN2	Benign	0.27	T;T
Eigen	Benign	-0.56
Eigen_PC	Benign	-0.47
FATHMM_MKL	Benign	0.38	N
LIST_S2	Benign	0.54	T;T
M_CAP	Benign	0.023	T
MetaRNN	Benign	0.14	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.69	.;N
MutationTaster	Benign	1.0	D
PrimateAI	Benign	0.44	T
PROVEAN	Benign	-0.72	.;N
REVEL	Benign	0.063
Sift	Benign	0.32	.;T
Sift4G	Benign	0.35	T;T
Polyphen		0.0	.;B
Vest4		0.24
MutPred		0.42		Gain of glycosylation at L386 (P = 0.0087);Gain of glycosylation at L386 (P = 0.0087);
MVP		0.12
MPC		0.057
ClinPred		0.10	T
GERP RS		0.96
Varity_R		0.12
gMVP		0.52

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: rs876658871; hg19: chr19-1226501;