Genetic Variant STK11:c.465-8G>T (chr19-1220365-G-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_000455.5(STK11):c.465-8G>T variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000693 in 1,443,956 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

STK11
NM_000455.5 splice_region, intron

Scores

Splicing: ADA: 0.00001202

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.362

Publications

0 publications found

Variant links:

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]

STK11 Gene-Disease associations (from GenCC):

familial pancreatic carcinoma
Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
Peutz-Jeghers syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, Orphanet, Genomics England PanelApp, G2P
familial ovarian cancer
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

STK11 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.93).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000455.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
STK11	NM_000455.5	MANE Select	c.465-8G>T	splice_region intron	N/A	NP_000446.1
STK11	NM_001407255.1		c.465-8G>T	splice_region intron	N/A	NP_001394184.1
STK11	NR_176325.1		n.1732-8G>T	splice_region intron	N/A

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
STK11	ENST00000326873.12	TSL:1 MANE Select	c.465-8G>T	splice_region intron	N/A	ENSP00000324856.6
STK11	ENST00000652231.1		c.465-8G>T	splice_region intron	N/A	ENSP00000498804.1
STK11	ENST00000585748.3	TSL:3	c.93-8G>T	splice_region intron	N/A	ENSP00000477641.2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.93e-7

AC:

AN:

1443956

Hom.:

Cov.:

AF XY:

0.00000140

AC XY:

AN XY:

716618

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33248

American (AMR)

AF:

0.00

AC:

AN:

42218

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25710

East Asian (EAS)

AF:

0.00

AC:

AN:

38992

South Asian (SAS)

AF:

0.00

AC:

AN:

83506

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50898

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5742

European-Non Finnish (NFE)

AF:

9.06e-7

AC:

AN:

1103922

Other (OTH)

AF:

0.00

AC:

AN:

59720

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.93

CADD

Benign

3.9

(source)

DANN

Benign

0.62

PhyloP100

-0.36

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.3

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000012

dbscSNV1_RF

Benign

0.0

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over