rs147791378

Variant names:

• chr1-235759071-C-A
• NM_000081.4:c.6782G>T

Your query was ambiguous. Multiple possible variants found:

• chr1-235759071-C-A
• chr1-235759071-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_000081.4(LYST):​c.6782G>T​(p.Arg2261Leu) 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. 13/21 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. R2261C) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: LYST NM_000081.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.26

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.38455197).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LYST	NM_000081.4	c.6782G>T	p.Arg2261Leu	missense_variant	Exon 23 of 53	ENST00000389793.7	NP_000072.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LYST	ENST00000389793.7	c.6782G>T	p.Arg2261Leu	missense_variant	Exon 23 of 53	5	NM_000081.4	ENSP00000374443.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Chédiak-Higashi syndrome Uncertain:1

Jul 05, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with leucine, which is neutral and non-polar, at codon 2261 of the LYST protein (p.Arg2261Leu). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with LYST-related conditions. 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 leucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.031	T
BayesDel_noAF	Benign	-0.28
CADD	Benign	20
DANN	Uncertain	1.0
DEOGEN2	Benign	0.23	T
Eigen	Benign	0.11
Eigen_PC	Benign	-0.036
FATHMM_MKL	Benign	0.73	D
LIST_S2	Benign	0.82	T
M_CAP	Benign	0.075	D
MetaRNN	Benign	0.38	T
MetaSVM	Uncertain	-0.27	T
MutationAssessor	Benign	2.0	M
PrimateAI	Benign	0.27	T
PROVEAN	Uncertain	-3.0	D
REVEL	Uncertain	0.31
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0030	D
Polyphen		1.0	D
Vest4		0.26
MutPred		0.55		Gain of helix (P = 0.062);
MVP		0.58
ClinPred		0.88	D
GERP RS		2.9
Varity_R		0.24
gMVP		0.47

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-235922371;