Is AFTPH p.Met128Val (c.382A>G) pathogenic?

AFTPH p.Met128Val (c.382A>G) is classified Uncertain significance in AFTPH (ClinVar, Single submitter, 1 submitter; last evaluated 2025-09-10). AlphaMissense: likely benign (0.0782); Ultra-rare (popmax 0.0183%, amr).

How common is AFTPH p.Met128Val (c.382A>G) in the general population?

AFTPH p.Met128Val (c.382A>G) is ultra-rare (popmax 0.0183%, amr) (gnomAD).

What do computational predictors say about AFTPH p.Met128Val (c.382A>G)?

AlphaMissense predicts likely benign (score 0.0782) — an in-silico prediction, not a clinical call.

AFTPH p.Met128Val

c.382A>G · VCV4248725

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0782 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0183%, amr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0782	likely benign
REVEL	0.024	moderately benign-leaning
SaProt	LLR -4.94	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 0.59
Overall
CADD	0.556	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 and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0183% Admixed American · 11/59,998 alleles

Filtering AF 0.0102% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00785%

Overall 0.0018% 29/1,613,804 alleles · ultra-rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.0183%	5,454
Middle Eastern	0.0164%	6,084
Remaining individualsnot grpmax-eligible	0.0064%	15,621
South Asian	0.0022%	45,537
European (non-Finnish)	0.000932%	107,264

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: AFTPH
Protein: p.Met128Val
Coding: c.382A>G
MANE Select: NM_203437
Type: single nucleotide variant
Location: chr2:64551856 (GRCh38)
Gene constraint: LOEUF 0.207 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 46.36
Residue 128: the 'interaction with ap1g1, ap1g2, gga1 and gga3' region

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

Similar variants

AFTPH p.Ala204Thr Uncertain significance ★ ⚠ same type
AFTPH p.Ala20Gly Uncertain significance ★ ⚠ same type
AFTPH p.Ala526Gly Uncertain significance ★ ⚠ same type
AFTPH p.Ala587Thr Uncertain significance ★ ⚠ same type
AFTPH p.Ala658Thr Uncertain significance ★ ⚠ same type
AFTPH p.Ala905Thr Uncertain significance ★ ⚠ same type
AFTPH p.Arg256Thr Uncertain significance ★ ⚠ same type
AFTPH p.Arg262Trp 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/aftph-p-met128val (accessed [today's date]).

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