1-235787357-T-G

Position:

chr1-235787357-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM2PP2PP3BS1_Supporting

The NM_000081.4(LYST):c.4705A>C(p.Asn1569His) variant causes a missense change. The variant allele was found at a frequency of 0.0000855 in 1,613,800 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000090 ( 1 hom. )

Consequence

LYST
NM_000081.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:8B:1

Conservation

PhyloP100: 4.53

Variant links:

Genes affected

LYST (HGNC:1968): (lysosomal trafficking regulator) This gene encodes a protein that regulates intracellular protein trafficking in endosomes, and may be involved in pigmentation. Mutations in this gene are associated with Chediak-Higashi syndrome, a lysosomal storage disorder. Alternative splicing results in multiple transcript variants, though the full-length nature of some of these variants has not been determined. [provided by RefSeq, Apr 2013]

LYST links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), LYST. . Trascript score misZ 4.0845 (greater than threshold 3.09). GenCC has associacion of gene with Chediak-Higashi syndrome, attenuated Chédiak-Higashi syndrome.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.746

BS1

Variant frequency is greater than expected in population mid. gnomad4_exome allele frequency = 0.0000903 (132/1461508) while in subpopulation MID AF= 0.00694 (40/5760). AF 95% confidence interval is 0.00524. There are 1 homozygotes in gnomad4_exome. There are 71 alleles in male gnomad4_exome subpopulation. Median coverage is 30. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LYST	NM_000081.4 linkuse as main transcript	c.4705A>C	p.Asn1569His	missense_variant	14/53	ENST00000389793.7	NP_000072.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LYST	ENST00000389793.7 linkuse as main transcript	c.4705A>C	p.Asn1569His	missense_variant	14/53	5	NM_000081.4	ENSP00000374443	P1	Q99698-1
LYST	ENST00000489585.5 linkuse as main transcript	c.4705A>C	p.Asn1569His	missense_variant, NMD_transcript_variant	14/23	1		ENSP00000513166		Q99698-2
LYST	ENST00000492844.1 linkuse as main transcript	n.165A>C		non_coding_transcript_exon_variant	2/2	3
LYST	ENST00000697178.1 linkuse as main transcript	c.*129A>C		3_prime_UTR_variant, NMD_transcript_variant	13/52			ENSP00000513163

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152176

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000916

AC:

AN:

251218

Hom.:

AF XY:

0.000103

AC XY:

AN XY:

135784

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000867

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000653

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000141

Gnomad OTH exome

AF:

0.000327

GnomAD4 exome

AF:

0.0000903

AC:

132

AN:

1461508

Hom.:

Cov.:

AF XY:

0.0000977

AC XY:

AN XY:

727078

show subpopulations

Gnomad4 AFR exome

AF:

0.0000598

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000630

Gnomad4 OTH exome

AF:

0.000248

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152292

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74466

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000135

Hom.:

Bravo

AF:

0.0000567

ExAC

AF:

0.0000741

AC:

EpiCase

AF:

0.000327

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:8Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Chédiak-Higashi syndrome

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Oct 31, 2018	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Sep 26, 2022	This sequence change replaces asparagine, which is neutral and polar, with histidine, which is basic and polar, at codon 1569 of the LYST protein (p.Asn1569His). This variant is present in population databases (rs767687843, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with LYST-related conditions. ClinVar contains an entry for this variant (Variation ID: 296395). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt LYST protein function. 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. -

not provided

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jan 29, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Blueprint Genetics	May 21, 2018	- -

LYST-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Oct 26, 2023

The LYST c.4705A>C variant is predicted to result in the amino acid substitution p.Asn1569His. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.013% of alleles in individuals of European (Non-Finnish) descent in gnomAD (http://gnomad.broadinstitute.org/variant/1-235950657-T-G). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 02, 2021

The c.4705A>C (p.N1569H) alteration is located in exon 14 (coding exon 12) of the LYST gene. This alteration results from a A to C substitution at nucleotide position 4705, causing the asparagine (N) at amino acid position 1569 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Meniere disease

Uncertain:1

Uncertain significance, no assertion criteria provided

research

Center for Computational Biology & Bioinformatics, University of California, San Diego

Jun 03, 2024

- -

Autoinflammatory syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genome Diagnostics Laboratory, The Hospital for Sick Children

Feb 26, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Benign

-0.29

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.29

Eigen

Uncertain

0.56

Eigen_PC

Uncertain

0.54

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.88

M_CAP

Benign

0.040

MetaRNN

Pathogenic

0.75

MetaSVM

Benign

-0.42

MutationAssessor

Uncertain

2.3

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Benign

0.42

PROVEAN

Uncertain

-2.5

REVEL

Benign

0.16

Sift

Uncertain

0.018

Sift4G

Uncertain

0.017

Polyphen

1.0

Vest4

0.62

MutPred

0.29

Gain of catalytic residue at N1569 (P = 0.0428);

MVP

0.81

ClinPred

0.44

GERP RS

4.7

Varity_R

0.17

gMVP

0.51

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