Is INTS8 p.Val488Ala (c.1463T>C) pathogenic?

INTS8 p.Val488Ala (c.1463T>C) is classified Uncertain significance in INTS8 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-02). AlphaMissense: likely benign (0.1809); Ultra-rare (popmax 0.0329%, mid).

How common is INTS8 p.Val488Ala (c.1463T>C) in the general population?

INTS8 p.Val488Ala (c.1463T>C) is ultra-rare (popmax 0.0329%, mid) (gnomAD).

What do computational predictors say about INTS8 p.Val488Ala (c.1463T>C)?

AlphaMissense predicts likely benign (score 0.1809) — an in-silico prediction, not a clinical call.

INTS8 p.Val488Ala

c.1463T>C · VCV4276040

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1809 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0329%, mid)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1809	likely benign
REVEL	0.1	moderately benign-leaning
SaProt	LLR -6.41	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	Δ0.25	donor loss, 2 bp away · masked 0 · deltas
Constraint at this position
Conservation	phyloP 7.8	GERP 1.7, phastCons 1
Regional constraint	o/e 0.85	unconstrained · MANE · 57 kb · p 2.4e-07 · regional, not allelic
Overall
CADD	23.7	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 0.0329% Middle Eastern · 2/6,084 alleles

Filtering AF 0.0058% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00313%

Overall 0.00223% 36/1,612,612 alleles · ultra-rare exomes 34/1,460,452 · genomes 2/152,160 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0329%	3,042
South Asian	0.00881%	11,346
European (non-Finnish)	0.0022%	45,359

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: INTS8
Protein: p.Val488Ala
Coding: c.1463T>C
MANE Select: NM_017864
Type: single nucleotide variant
Location: chr8:94850047 (GRCh38)
Gene constraint: LOEUF 0.453 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 84.47 · 10 PDB

Full INTS8 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

INTS8 p.Tyr499Cys Uncertain significance ★★ ⚠ same type
INTS8 c.1018-11G>A Benign ★★ same type
INTS8 p.Ala898= Benign ★★ same type
INTS8 p.Gly437Glu Likely benign ★★ same type
INTS8 p.His922= Benign ★★ same type
INTS8 p.Ser710= Benign ★★ same type
INTS8 p.Ser755Arg Benign/Likely benign ★★ ⚠ same type
INTS8 p.Arg359Ter Likely pathogenic ★ 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/ints8-p-val488ala (accessed [today's date]).

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