22-20982334-T-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 1P and 1B. PP5BP4

The NM_006767.4(LZTR1):c.-38T>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000295 in 1,493,790 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).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000031 ( 0 hom. )

Consequence

LZTR1
NM_006767.4 5_prime_UTR

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:4U:2

Conservation

PhyloP100: -0.226

Variant links:

Genes affected

LZTR1 (HGNC:6742): (leucine zipper like post translational regulator 1) This gene encodes a member of the BTB-kelch superfamily. Initially described as a putative transcriptional regulator based on weak homology to members of the basic leucine zipper-like family, the encoded protein subsequently has been shown to localize exclusively to the Golgi network where it may help stabilize the Gogli complex. Deletion of this gene may be associated with DiGeorge syndrome. [provided by RefSeq, Jul 2008]

LZTR1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PP5

Variant 22-20982334-T-A is Pathogenic according to our data. Variant chr22-20982334-T-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 549752.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=3, Pathogenic=1, Uncertain_significance=2}.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.75).. Strength limited to SUPPORTING due to the PP5.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LZTR1	NM_006767.4 linkuse as main transcript	c.-38T>A		5_prime_UTR_variant	1/21	ENST00000646124.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LZTR1	ENST00000646124.2 linkuse as main transcript	c.-38T>A		5_prime_UTR_variant	1/21		NM_006767.4	P1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152126

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000802

AC:

AN:

124616

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

67828

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000214

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000313

AC:

AN:

1341664

Hom.:

Cov.:

AF XY:

0.0000242

AC XY:

AN XY:

660042

show subpopulations

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:

0.0000393

Gnomad4 OTH exome

AF:

0.0000180

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152126

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74314

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000340

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:4Uncertain:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

GeneDx

May 26, 2022

Published functional studies demonstrate an approximately 20% reduction in activity compared to the wildtype. Additionally, models suggest that the variant creates a new ATG start site upstream of the endogenous start site but this was not tested functionally (Pagnamenta et al., 2019); Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 30859559) -

Noonan syndrome 2;C3810283:Schwannomatosis 2;C4225280:Noonan syndrome 10

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Feb 02, 2022

- -

Noonan syndrome 2;C4225280:Noonan syndrome 10

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Laboratorio de Genetica e Diagnostico Molecular, Hospital Israelita Albert Einstein

Apr 07, 2021

ACMG classification criteria: PS4 supporting, PM2, PM3 strong -

Noonan syndrome 2

Pathogenic:1

Pathogenic, criteria provided, single submitter

research

Genomic Medicine Theme, NIHR Oxford Biomedical Research Centre, University of Oxford

Jan 30, 2019

As well as lying in trans with a pathogenic allele and co-segregating with disease in the pedigree, the effect of the 5â€™-UTR variant c.-38T>A on the expression of LZTR1 was further investigated using a dual luciferase reporter assay, as previously described (Calvo et al 2009 PMID: 19372376). The ratio of renilla to firefly luciferase was consistently reduced to 77-85% for the mutant 5â€™-UTR in comparison to the WT. -

Schwannomatosis 2

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Baylor Genetics

Jul 23, 2023

- -

Hereditary cancer-predisposing syndrome;CN230736:Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 18, 2022

The c.-38T>A variant is located in the 5' untranslated region (5’ UTR) of the LZTR1 gene. This variant results from a T to A substitution 38 bases upstream from the first translated codon and introduces a possible alternative, out-of-frame initiation codon. This alteration has been detected in trans with LZTR1 c.1311G>A p.W437* in two siblings with suspected autosomal recessive Noonan Syndrome; an unaffected sibling did not carry both variants (Pagnamenta AT et al. Clin. Genet., 2019 Jun;95:693-703). An in vitro functional assay indicated that this variant results in a partial reduction in protein expression; however, the clinical relevance of the observed level of reduction is unclear (Pagnamenta AT et al. Clin. Genet., 2019 Jun;95:693-703). This nucleotide position is not well conserved in available vertebrate species. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.75

Cadd

Benign

Dann

Benign

0.77

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.2

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over