Is SPEF2 p.Pro1305Ser (c.3913C>T) pathogenic?

SPEF2 p.Pro1305Ser (c.3913C>T) is classified Uncertain significance in SPEF2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-03-29). AlphaMissense: likely benign (0.0753); No allele count reported in gnomAD v4.1 (AN 1,597,892); Associated with Inborn genetic diseases.

What condition is associated with SPEF2 p.Pro1305Ser (c.3913C>T)?

SPEF2 p.Pro1305Ser (c.3913C>T) is associated with Inborn genetic diseases (ClinVar).

How common is SPEF2 p.Pro1305Ser (c.3913C>T) in the general population?

SPEF2 p.Pro1305Ser (c.3913C>T) is no allele count reported in gnomAD v4.1 (AN 1,597,892) (gnomAD).

What do computational predictors say about SPEF2 p.Pro1305Ser (c.3913C>T)?

AlphaMissense predicts likely benign (score 0.0753) — an in-silico prediction, not a clinical call.

SPEF2 p.Pro1305Ser

c.3913C>T · rs2531168874 · VCV2280010

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0753 · ACMG-weighted

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,597,892)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.0753	likely benign
REVEL	0.062	moderately benign-leaning
SaProt	LLR -5.91	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 -1.1	GERP -3.7
Regional constraint	o/e 1.02	unconstrained · MANE · 197 kb · p 0.46 · regional, not allelic
Overall
CADD	2.851	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

No allele count reported in gnomAD v4.1 (AN 1,597,892). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: SPEF2
Protein: p.Pro1305Ser
Coding: c.3913C>T
MANE Select: NM_024867
dbSNP: rs2531168874
Type: single nucleotide variant
Location: chr5:35771720 (GRCh38)
Gene constraint: LOEUF 0.923 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 71.30
Residue 1305: a UniProt-annotated variant site (in spgf43; loss of protein expression; changed sperm axoneme assembly); the 'disordered' region; a UniProt-annotated variant site (found in a female patient with primary ciliary dyskinesia-like symptoms including chronic sinusitis, bronchitis, chronic wet cough and recurrent pneumonia; uncertain significance)

Full SPEF2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

SPEF2 p.Asp797Gly Uncertain significance ★★ ⚠ same condition
SPEF2 p.Glu116Lys Uncertain significance ★★ ⚠ same condition
SPEF2 p.Glu1752Gln Uncertain significance ★★ ⚠ same condition
SPEF2 p.Ala1122Thr Uncertain significance ★ ⚠ same condition
SPEF2 p.Ala1323Val Uncertain significance ★ ⚠ same condition
SPEF2 p.Ala1355Thr Uncertain significance ★ ⚠ same condition
SPEF2 p.Ala1405Ser Uncertain significance ★ ⚠ same condition
SPEF2 p.Ala1772Thr Uncertain significance ★ ⚠ same condition

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/spef2-p-pro1305ser (accessed [today's date]).

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