Is MRTFA p.Pro826Ser (c.2476C>T) pathogenic?

MRTFA p.Pro826Ser (c.2476C>T) is classified Uncertain significance in MRTFA (ClinVar, Single submitter, 1 submitter; last evaluated 2025-12-04). AlphaMissense: likely benign (0.1471); Absent from gnomAD v4.1.

How common is MRTFA p.Pro826Ser (c.2476C>T) in the general population?

MRTFA p.Pro826Ser (c.2476C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about MRTFA p.Pro826Ser (c.2476C>T)?

AlphaMissense predicts likely benign (score 0.1471) — an in-silico prediction, not a clinical call.

MRTFA p.Pro826Ser

c.2476C>T · VCV4553405

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1471 · 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	0.1471	likely benign
REVEL	0.347	indeterminate
SaProt	LLR -10.71	damaging
⇒ SaProt calls this damaging; AlphaMissense does not; REVEL is indeterminate.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 8.5	GERP 2.1, phastCons 1
Regional constraint	o/e 1.06	unconstrained · MANE · 13 kb · p 0.043 · regional, not allelic
Overall
CADD	24.8	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM P726S vs ClinVar P826S) — verify the residue.

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: MRTFA
Protein: p.Pro826Ser
Coding: c.2476C>T
MANE Select: NM_020831
Type: single nucleotide variant
Location: chr22:40417382 (GRCh38)
Gene constraint: LOEUF 0.389 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 56.59 · 2 PDB
Residue 726 UniProt numbering: the 'disordered' region; a UniProt-annotated variant site (in imd66; probable loss-of-function; patient's dendritic cells are morphologically distinct from control dendritic cells and show reduced spreading on fibronectin-coated coverslips, a marked reduction in total f-actin staining and a complete absence of podosomes, a similar phenotype to that of thp1 cells in which mrtfa was silenced)

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

Similar variants

MRTFA p.Ala352Thr Uncertain significance ★★ ⚠ same type
MRTFA p.Ala360Thr Uncertain significance ★★ ⚠ same type
MRTFA p.Ala429Ser Uncertain significance ★★ ⚠ same type
MRTFA p.Ala479Gly Uncertain significance ★★ ⚠ same type
MRTFA p.Ala479Val Uncertain significance ★★ ⚠ same type
MRTFA p.Ala534Thr Uncertain significance ★★ ⚠ same type
MRTFA p.Ala537Val Uncertain significance ★★ ⚠ same type
MRTFA p.Ala616Val 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/mrtfa-p-pro826ser (accessed [today's date]).

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