Is LYST p.Val24= (c.72C>T) pathogenic?

LYST p.Val24= (c.72C>T) is classified Likely benign in LYST (ClinVar, Single submitter, 1 submitter; last evaluated 2024-01-18). Very rare (popmax 0.00223%, eas); Associated with Chediak-Higashi syndrome.

What condition is associated with LYST p.Val24= (c.72C>T)?

LYST p.Val24= (c.72C>T) is associated with Chediak-Higashi syndrome (ClinVar).

How common is LYST p.Val24= (c.72C>T) in the general population?

LYST p.Val24= (c.72C>T) is very rare (popmax 0.00223%, eas) (gnomAD).

How is Chédiak-Higashi syndrome inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

LYST p.Val24=

c.72C>T · rs1005747188 · VCV2729086

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00223%, eas)

Conditions

Chediak-Higashi syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -0.56	GERP -4.7, phastCons 0.001
Overall
CADD	4.183	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00223% East Asian · 1/44,844 alleles

Filtering AF 0.000359% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00026%

Overall 0.000682% 11/1,613,490 alleles · very rare exomes 10/1,461,604 · genomes 1/151,886 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00223%	44,844
Finnishnot grpmax-eligible	0.00156%	63,908
European (non-Finnish)	0.000763%	131,101

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: LYST
Protein: p.Val24=
Coding: c.72C>T
MANE Select: NM_000081
dbSNP: rs1005747188
Type: single nucleotide variant
Location: chr1:235830346 (GRCh38)
Gene constraint: LOEUF 0.505 · pLI <0.01 (gnomAD)

Full LYST gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Chediak-Higashi syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Chédiak-Higashi syndrome (Orphanet):

Inheritance: Autosomal recessive
Onset: Childhood

Similar variants

LYST p.Val24Ala Uncertain significance ★★ ⚠ same residue
LYST p.Val24Phe Uncertain significance ★★ ⚠ same residue
LYST p.Val24Gly Uncertain significance ★ same residue
LYST p.Val24fs Pathogenic ★ same residue
LYST c.192+1G>A Pathogenic/Likely pathogenic ★★ same condition
LYST c.4862+2T>A Likely pathogenic ★★ same condition
LYST c.4863-1G>C Likely pathogenic ★★ same condition
LYST c.6882-1G>T Likely pathogenic ★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/lyst-p-val24 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown