Is SLC19A3 p.His135Arg (c.404A>G) pathogenic?

SLC19A3 p.His135Arg (c.404A>G) is classified Uncertain significance in SLC19A3 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-03-23). AlphaMissense: likely benign (0.097); Absent from gnomAD v4.1.

How common is SLC19A3 p.His135Arg (c.404A>G) in the general population?

SLC19A3 p.His135Arg (c.404A>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about SLC19A3 p.His135Arg (c.404A>G)?

AlphaMissense predicts likely benign (score 0.097) — an in-silico prediction, not a clinical call.

SLC19A3 p.His135Arg

c.404A>G · VCV4960373

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.097 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/2 damaging

AlphaMissense, SaProt · REVEL indeterminate

Computational evidence

Protein change
AlphaMissense	0.097	likely benign
REVEL	0.337	indeterminate
SaProt	LLR -11.76	damaging
⇒ SaProt calls this damaging; AlphaMissense does not; REVEL is indeterminate.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 3.5	GERP 1.9, phastCons 1
Regional constraint	o/e 0.99	unconstrained · MANE · 15 kb · p 0.85 · regional, not allelic
Overall
CADD	16.89	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

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: SLC19A3
Protein: p.His135Arg
Coding: c.404A>G
MANE Select: NM_025243
Type: single nucleotide variant
Location: chr2:227699311 (GRCh38)
Gene constraint: LOEUF 0.968 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 81.96 · 19 PDB
Residue 135: an α-helix

Full SLC19A3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

SLC19A3 p.His135Asn Uncertain significance ★ ⚠ same residue
SLC19A3 p.His135= Likely benign ★ same residue
SLC19A3 c.1172+1G>A Pathogenic/Likely pathogenic ★★ same type
SLC19A3 c.1172+2T>G Pathogenic ★★ same type
SLC19A3 c.1173-1G>A Pathogenic/Likely pathogenic ★★ same type
SLC19A3 c.151-1G>C Likely pathogenic ★★ same type
SLC19A3 c.980-14A>G Pathogenic/Likely pathogenic ★★ same type
SLC19A3 p.Gly23Val Pathogenic/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/slc19a3-p-his135arg (accessed [today's date]).

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