Is SLC19A1 p.Ala252Val (c.755C>T) pathogenic?

SLC19A1 p.Ala252Val (c.755C>T) is classified Likely benign in SLC19A1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-10-15). AlphaMissense: likely benign (0.0712); Very rare (popmax 0.0011%, sas).

How common is SLC19A1 p.Ala252Val (c.755C>T) in the general population?

SLC19A1 p.Ala252Val (c.755C>T) is very rare (popmax 0.0011%, sas) (gnomAD).

What do computational predictors say about SLC19A1 p.Ala252Val (c.755C>T)?

AlphaMissense predicts likely benign (score 0.0712) — an in-silico prediction, not a clinical call.

SLC19A1 p.Ala252Val

c.755C>T · VCV4584691

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0712 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.0011%, sas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0712	likely benign
REVEL	0.176	moderately benign-leaning
SaProt	LLR -4.54	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 -0.32	GERP -2.9
Regional constraint	o/e 1.00	unconstrained · MANE · 22 kb · p 0.89 · regional, not allelic
Overall
CADD	0.635	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 0.0011% South Asian · 1/91,036 alleles

Filtering AF 6.8e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.9e-05%

Overall 0.000248% 4/1,612,330 alleles · very rare exomes 4/1,460,062 · genomes 0/152,268 · joint denominator

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0011%	91,036
European (non-Finnish)	0.000254%	393,239

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: SLC19A1
Protein: p.Ala252Val
Coding: c.755C>T
MANE Select: NM_194255
Type: single nucleotide variant
Location: chr21:45531583 (GRCh38)
Gene constraint: LOEUF 1.585 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 73.30 · 19 PDB

Full SLC19A1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

SLC19A1 p.Ala252= Likely benign ★ same residue
COL18A1 p.Arg1081Ter Pathogenic/Likely pathogenic ★★ same type
COL18A1 p.Arg915Ter Pathogenic/Likely pathogenic ★★ same type
RFC1 p.Arg383Ter Pathogenic/Likely pathogenic ★★ same type
COL18A1 c.*30G>A Uncertain significance ★★ same type
COL18A1 p.Ala1089Thr Uncertain significance ★★ ⚠ same type
COL18A1 p.Ala1254Val Uncertain significance ★★ ⚠ same type
COL18A1 p.Arg1081Gln 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/slc19a1-p-ala252val (accessed [today's date]).

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