Is RTN4 p.Pro308Ala (c.922C>G) pathogenic?

RTN4 p.Pro308Ala (c.922C>G) is classified Uncertain significance in RTN4 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-12-22). AlphaMissense: likely benign (0.0796); Ultra-rare (popmax 0.0143%, sas).

How common is RTN4 p.Pro308Ala (c.922C>G) in the general population?

RTN4 p.Pro308Ala (c.922C>G) is ultra-rare (popmax 0.0143%, sas) (gnomAD).

What do computational predictors say about RTN4 p.Pro308Ala (c.922C>G)?

AlphaMissense predicts likely benign (score 0.0796) — an in-silico prediction, not a clinical call.

RTN4 p.Pro308Ala

c.922C>G · rs199609007 · VCV3157048

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0796 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0143%, sas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0796	likely benign
REVEL	0.084	moderately benign-leaning
SaProt	LLR -6.82	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 5.2	GERP 1.1, phastCons 1
Regional constraint	o/e 1.19	unconstrained · MANE · 77 kb · p 3e-13 · regional, not allelic
Overall
CADD	15.22	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 0.0143% South Asian · 13/91,056 alleles

Filtering AF 0.00844% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00661%

Overall 0.00149% 24/1,613,496 alleles · ultra-rare exomes 23/1,461,366 · genomes 1/152,130 · joint denominator

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0143%	7,004
Remaining individualsnot grpmax-eligible	0.0032%	31,239
European (non-Finnish)	0.000763%	131,083

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: RTN4
Protein: p.Pro308Ala
Coding: c.922C>G
MANE Select: NM_020532
dbSNP: rs199609007
Type: single nucleotide variant
Location: chr2:55027177 (GRCh38)
Gene constraint: LOEUF 0.546 · pLI 0.38 (gnomAD)
Structure: AlphaFold pLDDT 40.92 · 2 PDB

Full RTN4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

RTN4 p.Glu899Gln Benign ★★ same type
RTN4 p.Gly1070Ala Likely benign ★★ same type
RTN4 p.Leu620= Benign ★★ same type
RTN4 p.Leu814Met Likely benign ★★ same type
RTN4 p.Pro992= Benign ★★ same type
RTN4 p.Ser440Asn Benign ★★ same type
RTN4 p.Ser920Cys Benign ★★ same type
RTN4 p.Thr450Met Benign ★★ 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/rtn4-p-pro308ala (accessed [today's date]).

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