Is CHST4 p.Val78Met (c.232G>A) pathogenic?

CHST4 p.Val78Met (c.232G>A) is classified Uncertain significance in CHST4 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-12-20). AlphaMissense: ambiguous (0.4948); Very rare (popmax 0.00448%, eas).

How common is CHST4 p.Val78Met (c.232G>A) in the general population?

CHST4 p.Val78Met (c.232G>A) is very rare (popmax 0.00448%, eas) (gnomAD).

What do computational predictors say about CHST4 p.Val78Met (c.232G>A)?

AlphaMissense predicts ambiguous (score 0.4948) — an in-silico prediction, not a clinical call.

CHST4 p.Val78Met

c.232G>A · rs749651712 · VCV3144743

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.4948 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00448%, eas)

Missense predictors

1/2 damaging

REVEL, SaProt · AlphaMissense no call

Computational evidence

Protein change
AlphaMissense	0.4948	ambiguous
REVEL	0.8	moderately pathogenic-leaning
SaProt	LLR -8.16	tolerated
⇒ REVEL calls this damaging; SaProt does not; AlphaMissense makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 2.9	GERP 1.2, phastCons 1
Regional constraint	o/e 0.92	unconstrained · MANE · 1,157 bp · p 0.075 · regional, not allelic
Overall
CADD	24.1	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00448% East Asian · 2/44,656 alleles

Filtering AF 0.000742% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000278%

Overall 0.000873% 14/1,604,016 alleles · very rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00448%	22,328
Admixed American	0.00338%	29,602
Remaining individualsnot grpmax-eligible	0.00323%	30,957
African / African-American	0.00134%	74,708
South Asian	0.00111%	89,994
European (non-Finnish)	0.000511%	195,605

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: CHST4
Protein: p.Val78Met
Coding: c.232G>A
MANE Select: NM_001166395
dbSNP: rs749651712
Type: single nucleotide variant
Location: chr16:71536909 (GRCh38)
Gene constraint: LOEUF 1.836 · pLI 0.34 (gnomAD)
Structure: AlphaFold pLDDT 90.66

Full CHST4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CHST4 p.Ala135Val Uncertain significance ★ ⚠ same type
CHST4 p.Ala167Ser Uncertain significance ★ ⚠ same type
CHST4 p.Ala18Ser Uncertain significance ★ ⚠ same type
CHST4 p.Ala18Thr Uncertain significance ★ ⚠ same type
CHST4 p.Ala333Val Uncertain significance ★ ⚠ same type
CHST4 p.Arg118Gln Uncertain significance ★ ⚠ same type
CHST4 p.Arg130Gln Uncertain significance ★ ⚠ same type
CHST4 p.Arg130Trp Uncertain significance ★ ⚠ same type

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/chst4-p-val78met (accessed [today's date]).

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