NM_000081.4:c.6632C>G

Variant names:

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_000081.4(LYST):c.6632C>G(p.Pro2211Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0002 in 1,614,112 control chromosomes in the GnomAD database, including 3 homozygotes. 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 Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. P2211P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0011 ( 2 hom., cov: 32)

Exomes 𝑓: 0.00011 ( 1 hom. )

Consequence

LYST
NM_000081.4 missense

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 0.794

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 Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.004403591).

BP6

Variant 1-235759221-G-C is Benign according to our data. Variant chr1-235759221-G-C is described in ClinVar as [Likely_benign]. Clinvar id is 525190.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-235759221-G-C is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0011 (168/152256) while in subpopulation AFR AF= 0.00395 (164/41548). AF 95% confidence interval is 0.00345. There are 2 homozygotes in gnomad4. There are 81 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LYST	NM_000081.4 link	c.6632C>G	p.Pro2211Arg	missense_variant	Exon 23 of 53	ENST00000389793.7	NP_000072.2	Q99698-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LYST	ENST00000389793.7 link	c.6632C>G	p.Pro2211Arg	missense_variant	Exon 23 of 53	5	NM_000081.4	ENSP00000374443.2		Q99698-1

Frequencies

GnomAD3 genomes

AF:

0.00110

AC:

168

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00396

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000197

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000215

AC:

AN:

250946

Hom.:

AF XY:

0.000155

AC XY:

AN XY:

135616

show subpopulations

Gnomad AFR exome

AF:

0.00308

Gnomad AMR exome

AF:

0.0000579

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:

0.0000177

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000106

AC:

155

AN:

1461856

Hom.:

Cov.:

AF XY:

0.000106

AC XY:

AN XY:

727226

show subpopulations

Gnomad4 AFR exome

AF:

0.00427

Gnomad4 AMR exome

AF:

0.0000671

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:

0.00

Gnomad4 OTH exome

AF:

0.000132

GnomAD4 genome

AF:

0.00110

AC:

168

AN:

152256

Hom.:

Cov.:

AF XY:

0.00109

AC XY:

AN XY:

74438

show subpopulations

Gnomad4 AFR

AF:

0.00395

Gnomad4 AMR

AF:

0.000197

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000146

Hom.:

Bravo

AF:

0.00112

ESP6500AA

AF:

0.00295

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000280

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

Nov 18, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: LYST c.6632C>G (p.Pro2211Arg) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00022 in 250946 control chromosomes, predominantly at a frequency of 0.0031 within the African or African-American subpopulation in the gnomAD database, including 1 homozygotes. The observed variant frequency within African or African-American control individuals in the gnomAD database is approximately 3 fold of the estimated maximal expected allele frequency for a pathogenic variant in LYST causing Chediak-Higashi Syndrome phenotype (0.0011). To our knowledge, no occurrence of c.6632C>G in individuals affected with Chediak-Higashi Syndrome and no experimental evidence demonstrating its impact on protein function have been reported. ClinVar contains an entry for this variant (Variation ID: 525190). Based on the evidence outlined above, the variant was classified as likely benign. -

LYST-related disorder

Benign:1

Aug 02, 2021

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Chédiak-Higashi syndrome

Benign:1

Feb 02, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Inborn genetic diseases

Benign:1

Oct 27, 2022

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.093

BayesDel_addAF

Benign

-0.57

BayesDel_noAF

Benign

-0.59

CADD

Benign

4.1

DANN

Benign

0.51

DEOGEN2

Benign

0.13

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.29

LIST_S2

Benign

0.58

M_CAP

Benign

0.014

MetaRNN

Benign

0.0044

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.41

PrimateAI

Benign

0.28

PROVEAN

Benign

-1.4

REVEL

Benign

0.065

Sift

Benign

0.44

Sift4G

Benign

0.59

Polyphen

0.0

Vest4

0.071

MVP

0.20

ClinPred

0.014

GERP RS

-2.4

Varity_R

0.032

gMVP

0.21

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