Is ASPH p.Ala189Val (c.566C>T) pathogenic?

ASPH p.Ala189Val (c.566C>T) is classified Likely benign in ASPH (ClinVar, Single submitter, 1 submitter; last evaluated 2023-02-15). AlphaMissense: likely benign (0.0745); Ultra-rare (popmax 0.0827%, afr); Associated with Inborn genetic diseases.

What condition is associated with ASPH p.Ala189Val (c.566C>T)?

ASPH p.Ala189Val (c.566C>T) is associated with Inborn genetic diseases (ClinVar).

How common is ASPH p.Ala189Val (c.566C>T) in the general population?

ASPH p.Ala189Val (c.566C>T) is ultra-rare (popmax 0.0827%, afr) (gnomAD).

What do computational predictors say about ASPH p.Ala189Val (c.566C>T)?

AlphaMissense predicts likely benign (score 0.0745) — an in-silico prediction, not a clinical call.

ASPH p.Ala189Val

c.566C>T · rs143436295 · VCV2455959

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0745 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0827%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.0745	likely benign
REVEL	0.026	moderately benign-leaning
SaProt	LLR -5.58	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -1.4	GERP -3.9
Regional constraint	o/e 1.00	unconstrained · MANE · 211 kb · p 0.99 · regional, not allelic
Overall
CADD	0.578	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 0.0827% African / African-American · 62/74,930 alleles

Filtering AF 0.0662% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0603%

Overall 0.0049% 79/1,613,558 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0827%	1,209
Ashkenazi Jewishnot grpmax-eligible	0.0101%	9,864
Remaining individualsnot grpmax-eligible	0.008%	12,500
Admixed American	0.00167%	59,980
European (non-Finnish)	0.000678%	147,466

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: ASPH
Protein: p.Ala189Val
Coding: c.566C>T
MANE Select: NM_004318
dbSNP: rs143436295
Type: single nucleotide variant
Location: chr8:61646803 (GRCh38)
Gene constraint: LOEUF 1.011 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 72.34 · 43 PDB

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

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

ASPH p.Ala189= Likely benign ★ same residue
ASPH p.Arg753His Uncertain significance ★★ ⚠ same condition
ASPH p.Glu506Val Uncertain significance ★★ ⚠ same condition
ASPH p.Leu433Arg Uncertain significance ★★ ⚠ same condition
ASPH p.Ser299Asn Uncertain significance ★★ ⚠ same condition
ASPH p.Val214Met Uncertain significance ★★ ⚠ same condition
ASPH p.Val462Met Uncertain significance ★★ ⚠ same condition
ASPH p.Val83Ala Uncertain significance ★★ ⚠ 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/asph-p-ala189val (accessed [today's date]).

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