Is IFT52 p.Arg33Trp (c.97C>T) pathogenic?

IFT52 p.Arg33Trp (c.97C>T) is classified Uncertain significance in IFT52 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-02-13). AlphaMissense: likely pathogenic (0.5745); Very rare (popmax 0.00447%, eas).

How common is IFT52 p.Arg33Trp (c.97C>T) in the general population?

IFT52 p.Arg33Trp (c.97C>T) is very rare (popmax 0.00447%, eas) (gnomAD).

What do computational predictors say about IFT52 p.Arg33Trp (c.97C>T)?

AlphaMissense predicts likely pathogenic (score 0.5745) — an in-silico prediction, not a clinical call.

IFT52 p.Arg33Trp

c.97C>T · rs547710015 · VCV3108411

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.5745 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00447%, eas)

Missense predictors

2/2 damaging

AlphaMissense, SaProt · REVEL indeterminate

Computational evidence

Protein change
AlphaMissense	0.5745	likely pathogenic
REVEL	0.614	indeterminate
SaProt	LLR -14.16	damaging
⇒ AlphaMissense and SaProt both call this damaging; REVEL is indeterminate.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 4.9	GERP 2, phastCons 1
Regional constraint	o/e 0.86	unconstrained · MANE · 52 kb · p 0.0018 · regional, not allelic
Overall
CADD	30.0	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — 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 0.00447% East Asian · 2/44,768 alleles

Filtering AF 0.00107% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000496%

Overall 0.000627% 10/1,594,190 alleles · very rare exomes 9/1,441,958 · genomes 1/152,232 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00447%	22,384
African / African-American	0.00402%	24,870
Remaining individualsnot grpmax-eligible	0.00161%	61,936
Finnishnot grpmax-eligible	0.00156%	63,986
European (non-Finnish)	0.000258%	387,291

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: IFT52
Protein: p.Arg33Trp
Coding: c.97C>T
MANE Select: NM_016004
dbSNP: rs547710015
Type: single nucleotide variant
Location: chr20:43594795 (GRCh38)
Gene constraint: LOEUF 1.116 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 84.21

Full IFT52 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

IFT52 p.Arg33= Likely benign ★ same residue
IFT52 p.Asn35Ser Uncertain significance ★★ ⚠ same type
IFT52 p.Glu4Asp Uncertain significance ★★ ⚠ same type
IFT52 p.Gly134Glu Uncertain significance ★★ ⚠ same type
IFT52 p.Leu164Phe Uncertain significance ★★ ⚠ same type
IFT52 p.Leu334Arg Uncertain significance ★★ same type
IFT52 p.Phe95Ser Uncertain significance ★★ ⚠ same type
IFT52 p.Pro397Ser 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/ift52-p-arg33trp (accessed [today's date]).

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