Is LYST p.Val24Phe (c.70G>T) pathogenic?

LYST p.Val24Phe (c.70G>T) is classified Uncertain significance in LYST (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-12-22). AlphaMissense: likely benign (0.2475); Ultra-rare (popmax 0.0347%, afr); Associated with Chediak-Higashi syndrome.

What condition is associated with LYST p.Val24Phe (c.70G>T)?

LYST p.Val24Phe (c.70G>T) is associated with Chediak-Higashi syndrome (ClinVar).

How common is LYST p.Val24Phe (c.70G>T) in the general population?

LYST p.Val24Phe (c.70G>T) is ultra-rare (popmax 0.0347%, afr) (gnomAD).

How is Chédiak-Higashi syndrome inherited?

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

What do computational predictors say about LYST p.Val24Phe (c.70G>T)?

AlphaMissense predicts likely benign (score 0.2475) — an in-silico prediction, not a clinical call.

LYST p.Val24Phe

c.70G>T · rs201023832 · VCV1982220

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.2475 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0347%, afr)

Missense predictors

0/2 damaging

AlphaMissense, REVEL · SaProt no call

Conditions

Chediak-Higashi syndrome

Computational evidence

Protein change
AlphaMissense	0.2475	likely benign
REVEL	0.223	benign-leaning
SaProt	—	not scored · why
⇒ AlphaMissense and REVEL both call this tolerated; SaProt makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 6	GERP 1.5, phastCons 1
Regional constraint	o/e 0.91	unconstrained · MANE · 42 kb · p 0.00014 · regional, not allelic
Overall
CADD	23.9	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL is an independent agreement signal.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0347% African / African-American · 26/74,994 alleles

Filtering AF 0.0242% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0208%

Overall 0.00173% 28/1,613,912 alleles · ultra-rare exomes 14/1,461,660 · genomes 14/152,252 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0347%	2,884
Admixed American	0.00167%	59,992
Remaining individualsnot grpmax-eligible	0.0016%	62,502

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.Val24Phe
Coding: c.70G>T
MANE Select: NM_000081
dbSNP: rs201023832
Type: single nucleotide variant
Location: chr1:235830348 (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.Val24Gly Uncertain significance ★ same residue
LYST p.Val24= Likely benign ★ 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-val24phe (accessed [today's date]).

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