Is MMS19 p.Pro253Ser (c.757C>T) pathogenic?

MMS19 p.Pro253Ser (c.757C>T) is classified Uncertain significance in MMS19 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-09-20). AlphaMissense: likely benign (0.0823); Very rare (popmax 0.00678%, nfe).

How common is MMS19 p.Pro253Ser (c.757C>T) in the general population?

MMS19 p.Pro253Ser (c.757C>T) is very rare (popmax 0.00678%, nfe) (gnomAD).

What do computational predictors say about MMS19 p.Pro253Ser (c.757C>T)?

AlphaMissense predicts likely benign (score 0.0823) — an in-silico prediction, not a clinical call.

MMS19 p.Pro253Ser

c.757C>T · rs141375872 · VCV3176079

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0823 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00678%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0823	likely benign
REVEL	0.081	moderately benign-leaning
SaProt	LLR -9.06	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 3.8	GERP -2.6, phastCons 1
Regional constraint	o/e 1.00	unconstrained · MANE · 28 kb · p 0.98 · regional, not allelic
Overall
CADD	19.12	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 0.00678% European (non-Finnish) · 80/1,179,138 alleles

Filtering AF 0.00555% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00514%

Overall 0.00515% 83/1,612,924 alleles · very rare exomes 73/1,460,764 · genomes 10/152,160 · joint denominator

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.00678%	14,739
Admixed American	0.00167%	59,978
Remaining individualsnot grpmax-eligible	0.0016%	62,440
African / African-American	0.00134%	74,874

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: MMS19
Protein: p.Pro253Ser
Coding: c.757C>T
MANE Select: NM_022362
dbSNP: rs141375872
Type: single nucleotide variant
Location: chr10:97470789 (GRCh38)
Gene constraint: LOEUF 0.787 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 91.00

Full MMS19 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

MMS19 p.Ala656= Likely benign ★★ same type
MMS19 p.Gln409Pro Benign ★★ same type
MMS19 p.Ala11Val Uncertain significance ★ ⚠ same type
MMS19 p.Ala121Ser Uncertain significance ★ ⚠ same type
MMS19 p.Ala2Val Uncertain significance ★ ⚠ same type
MMS19 p.Ala324Val Uncertain significance ★ ⚠ same type
MMS19 p.Ala383Val Uncertain significance ★ ⚠ same type
MMS19 p.Ala3Val 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/mms19-p-pro253ser (accessed [today's date]).

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