Is LYST p.Ser2144= (c.6432A>G) pathogenic?

LYST p.Ser2144= (c.6432A>G) is classified Likely benign in LYST (ClinVar, Multiple submitters, 6 submitters; last evaluated 2026-01-11). Ultra-rare (popmax 0.0205%, nfe); Associated with Chediak-Higashi syndrome.

What condition is associated with LYST p.Ser2144= (c.6432A>G)?

LYST p.Ser2144= (c.6432A>G) is associated with Chediak-Higashi syndrome (ClinVar).

How common is LYST p.Ser2144= (c.6432A>G) in the general population?

LYST p.Ser2144= (c.6432A>G) is ultra-rare (popmax 0.0205%, nfe) (gnomAD).

How is Chédiak-Higashi syndrome inherited?

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

LYST p.Ser2144=

c.6432A>G · rs145080654 · VCV705862

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 6 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0205%, nfe)

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 -0.65	GERP -4, phastCons 0.015
Overall
CADD	1.958	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0205% European (non-Finnish) · 242/1,180,006 alleles

Filtering AF 0.0183% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0175%

Overall 0.016% 258/1,614,146 alleles · ultra-rare exomes 242/1,461,848 · genomes 16/152,298 · joint denominator

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.0205%	4,876
Remaining individualsnot grpmax-eligible	0.0128%	7,813
African / African-American	0.00533%	18,760
Finnishnot grpmax-eligible	0.00312%	32,020
Admixed American	0.00167%	60,014
South Asian	0.0011%	91,082

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.Ser2144=
Coding: c.6432A>G
MANE Select: NM_000081
dbSNP: rs145080654
Type: single nucleotide variant
Location: chr1:235759421 (GRCh38)
Gene constraint: LOEUF 0.505 · pLI <0.01 (gnomAD)
Residue 2144: a UniProt-annotated variant site (in chs)

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-ser2144 (accessed [today's date]).

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