Is F5 p.Thr287= (c.861C>A) pathogenic?

F5 p.Thr287= (c.861C>A) is classified Likely benign in F5 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-04-22). Very rare (popmax 8.47e-05%, nfe); Associated with congenital factor V deficiency.

What condition is associated with F5 p.Thr287= (c.861C>A)?

F5 p.Thr287= (c.861C>A) is associated with congenital factor V deficiency (ClinVar).

How common is F5 p.Thr287= (c.861C>A) in the general population?

F5 p.Thr287= (c.861C>A) is very rare (popmax 8.47e-05%, nfe) (gnomAD).

How is Congenital factor V deficiency inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

F5 p.Thr287=

c.861C>A · rs2526435493 · VCV3015310

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 8.47e-05%, nfe)

Conditions

congenital factor V deficiency

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -0.62	GERP -4.1
Overall
CADD	5.58	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 8.47e-05% European (non-Finnish) · 1/1,180,000 alleles

Overall 6.2e-05% 1/1,614,066 alleles · very rare exomes 1/1,461,856 · genomes 0/152,210 · joint denominator

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: F5
Protein: p.Thr287=
Coding: c.861C>A
MANE Select: NM_000130
dbSNP: rs2526435493
Type: single nucleotide variant
Location: chr1:169556737 (GRCh38)
Gene constraint: LOEUF 0.704 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 62.57 · 23 PDB
Residue 287: a β-strand; the f5/8 type a 1 domain; the plastocyanin-like 2 domain

Full F5 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

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

For Congenital factor V deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: All ages
Prevalence: 1-9 / 1 000 000 (Europe)

Similar variants

F5 p.Thr287Asn Uncertain significance ★ ⚠ same residue
F5 c.1297-2A>G Pathogenic/Likely pathogenic ★★ same condition
F5 p.Arg1030Ter Pathogenic ★★ same condition
F5 p.Arg146Ter Pathogenic/Likely pathogenic ★★ same condition
F5 p.Arg1621Ter Pathogenic/Likely pathogenic ★★ same condition
F5 p.Arg1634Ter Pathogenic/Likely pathogenic ★★ same condition
F5 p.Arg2102His Pathogenic/Likely pathogenic ★★ same condition
F5 p.Arg740Ter Pathogenic/Likely pathogenic ★★ 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/f5-p-thr287 (accessed [today's date]).

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