Is LYST p.Phe987Val (c.2959T>G) pathogenic?

LYST p.Phe987Val (c.2959T>G) is classified Uncertain significance in LYST (ClinVar, Single submitter, 1 submitter; last evaluated 2022-06-09). AlphaMissense: likely benign (0.1627); Absent from gnomAD v4.1; Associated with Chediak-Higashi syndrome.

What condition is associated with LYST p.Phe987Val (c.2959T>G)?

LYST p.Phe987Val (c.2959T>G) is associated with Chediak-Higashi syndrome (ClinVar).

How common is LYST p.Phe987Val (c.2959T>G) in the general population?

LYST p.Phe987Val (c.2959T>G) is absent from gnomAD v4.1 (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.Phe987Val (c.2959T>G)?

AlphaMissense predicts likely benign (score 0.1627) — an in-silico prediction, not a clinical call.

LYST p.Phe987Val

c.2959T>G · rs1457325210 · VCV2003937

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1627 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

AlphaMissense, REVEL · SaProt no call

Conditions

Chediak-Higashi syndrome

Computational evidence

Protein change
AlphaMissense	0.1627	likely benign
REVEL	0.252	benign-leaning
SaProt	—	not scored · why
⇒ AlphaMissense and REVEL both call this tolerated; SaProt makes no call.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 4.5	GERP -0.27, phastCons 1
Regional constraint	o/e 0.91	unconstrained · MANE · 42 kb · p 0.00014 · regional, not allelic
Overall
CADD	20.1	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

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: LYST
Protein: p.Phe987Val
Coding: c.2959T>G
MANE Select: NM_000081
dbSNP: rs1457325210
Type: single nucleotide variant
Location: chr1:235806177 (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 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
LYST c.8358+2T>C Pathogenic/Likely pathogenic ★★ same condition
LYST c.8358+2T>G Likely pathogenic ★★ same condition
LYST c.8802-2A>G Pathogenic/Likely pathogenic ★★ same condition
LYST c.9784+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-phe987val (accessed [today's date]).

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