Is ENOSF1 p.Ser340Pro (c.1018T>C) pathogenic?

ENOSF1 p.Ser340Pro (c.1018T>C) is classified Uncertain significance in ENOSF1 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-02-12). AlphaMissense: ambiguous (0.3638); Ultra-rare (popmax 0.0329%, mid).

How common is ENOSF1 p.Ser340Pro (c.1018T>C) in the general population?

ENOSF1 p.Ser340Pro (c.1018T>C) is ultra-rare (popmax 0.0329%, mid) (gnomAD).

What do computational predictors say about ENOSF1 p.Ser340Pro (c.1018T>C)?

AlphaMissense predicts ambiguous (score 0.3638) — an in-silico prediction, not a clinical call.

ENOSF1 p.Ser340Pro

c.1018T>C · rs372512313 · VCV2203974

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.3638 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0329%, mid)

Missense predictors

1/2 damaging

REVEL, SaProt · AlphaMissense no call

Computational evidence

Protein change
AlphaMissense	0.3638	ambiguous
REVEL	0.15	moderately benign-leaning
SaProt	LLR -10.60	damaging
⇒ SaProt calls this damaging; REVEL does not; AlphaMissense makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 5	GERP 1.9, phastCons 1
Regional constraint	o/e 1.06	unconstrained · MANE · 38 kb · p 0.14 · regional, not allelic
Overall
CADD	23.0	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0329% Middle Eastern · 2/6,080 alleles

Filtering AF 0.0194% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.016%

Overall 0.0157% 254/1,614,014 alleles · ultra-rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0329%	3,040
Admixed American	0.03%	3,333
Remaining individualsnot grpmax-eligible	0.0256%	3,905
European (non-Finnish)	0.0173%	5,784
South Asian	0.00769%	13,009
African / African-American	0.00667%	14,986
Ashkenazi Jewishnot grpmax-eligible	0.00338%	29,608
Finnishnot grpmax-eligible	0.00156%	64,008

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: ENOSF1
Protein: p.Ser340Pro
Coding: c.1018T>C
MANE Select: NM_017512
dbSNP: rs372512313
Type: single nucleotide variant
Location: chr18:677773 (GRCh38)
Gene constraint: LOEUF 1.236 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 97.47 · 1 PDB
Residue 340: an α-helix

Full ENOSF1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ENOSF1 c.*1219T>C Benign ★★ same type
TYMS c.556+1G>A Pathogenic ★ same type
TYMS p.Arg271Ter Pathogenic ★ same type
ENOSF1 c.84+108G>C Uncertain significance ★ same type
ENOSF1 c.84+112A>C Uncertain significance ★ same type
ENOSF1 c.84+114C>G Uncertain significance ★ same type
ENOSF1 c.84+125T>C Uncertain significance ★ same type
ENOSF1 c.84+130A>C 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/enosf1-p-ser340pro (accessed [today's date]).

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