Is MPG p.Arg267Trp (c.799C>T) pathogenic?

MPG p.Arg267Trp (c.799C>T) is classified Uncertain significance in MPG (ClinVar, Single submitter, 1 submitter; last evaluated 2021-06-18). AlphaMissense: likely benign (0.0948); Very rare (popmax 0.00684%, afr).

How common is MPG p.Arg267Trp (c.799C>T) in the general population?

MPG p.Arg267Trp (c.799C>T) is very rare (popmax 0.00684%, afr) (gnomAD).

What do computational predictors say about MPG p.Arg267Trp (c.799C>T)?

AlphaMissense predicts likely benign (score 0.0948) — an in-silico prediction, not a clinical call.

MPG p.Arg267Trp

c.799C>T · rs969785856 · VCV2233601

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0948 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00684%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0948	likely benign
REVEL	0.089	moderately benign-leaning
SaProt	LLR -9.71	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 4.8	phastCons 0.99
Regional constraint	o/e 1.10	unconstrained · MANE · 7,464 bp · p 0.053 · regional, not allelic
Overall
CADD	26.9	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.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM R272W vs ClinVar R267W) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00684% African / African-American · 5/73,114 alleles

Filtering AF 0.0026% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00165%

Overall 0.00187% 29/1,547,634 alleles · very rare exomes 28/1,395,430 · genomes 1/152,204 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00684%	14,623
South Asian	0.0049%	20,392
Admixed American	0.00191%	52,288
European (non-Finnish)	0.00166%	60,226

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: MPG
Protein: p.Arg267Trp
Coding: c.799C>T
MANE Select: NM_001015052
dbSNP: rs969785856
Type: single nucleotide variant
Location: chr16:85694 (GRCh38)
Gene constraint: LOEUF 1.468 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 82.08 · 9 PDB
Residue 272 UniProt numbering: a turn

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

Similar variants

MPG p.Val280Ile Uncertain significance ★★ ⚠ same type
MPG p.Ala200Thr Uncertain significance ★ ⚠ same type
MPG p.Ala21Pro Uncertain significance ★ ⚠ same type
MPG p.Ala221Ser Uncertain significance ★ ⚠ same type
MPG p.Ala255Val Uncertain significance ★ ⚠ same type
MPG p.Ala96Glu Uncertain significance ★ ⚠ same type
MPG p.Arg104Gln Uncertain significance ★ ⚠ same type
MPG p.Arg105Gln 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/mpg-p-arg267trp (accessed [today's date]).

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