Is F10 p.Cys277Ser (c.829T>A) pathogenic?

F10 p.Cys277Ser (c.829T>A) is classified Uncertain significance in F10 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-04-28). AlphaMissense: likely pathogenic (0.9971); Absent from gnomAD v4.1; Associated with factor X deficiency.

What condition is associated with F10 p.Cys277Ser (c.829T>A)?

F10 p.Cys277Ser (c.829T>A) is associated with factor X deficiency (ClinVar).

How common is F10 p.Cys277Ser (c.829T>A) in the general population?

F10 p.Cys277Ser (c.829T>A) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about F10 p.Cys277Ser (c.829T>A)?

AlphaMissense predicts likely pathogenic (score 0.9971) — an in-silico prediction, not a clinical call.

F10 p.Cys277Ser

c.829T>A · rs2138554252 · VCV1098485

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9971 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

factor X deficiency

Computational evidence

Protein change
AlphaMissense	0.9971	likely pathogenic · top 1% in F10
REVEL	0.954	strongly pathogenic-leaning
SaProt	LLR -13.07	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.7	GERP 0.49, phastCons 1
Regional constraint	o/e 0.75	unconstrained · MANE · 10 kb · p 2.9e-09 · regional, not allelic
Overall
CADD	25.2	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — 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

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: F10
Protein: p.Cys277Ser
Coding: c.829T>A
MANE Select: NM_000504
dbSNP: rs2138554252
Type: single nucleotide variant
Location: chr13:113147460 (GRCh38)
Gene constraint: LOEUF 0.968 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 80.47 · 192 PDB
Residue 277: the peptidase s1 domain; an α-helix; a disulfide bond

Full F10 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

factor X deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

F10 p.Glu54Gly Likely pathogenic ★★ same condition
F10 p.Gly21Arg Pathogenic ★★ ⚠ same condition
F10 p.Arg291Gln Uncertain significance ★★ ⚠ same condition
F10 p.Glu69Lys Likely pathogenic ★ same condition
F10 p.Thr358Met Likely pathogenic ★ ⚠ same condition
F10 p.Arg27His Uncertain significance ★ ⚠ same condition
F10 p.Asp463His Uncertain significance ★ ⚠ same condition
F10 p.Glu142Lys Conflicting classifications of pathogenicity ★ ⚠ 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/f10-p-cys277ser (accessed [today's date]).

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