Is F5 p.Ser80= (c.240T>C) pathogenic?

F5 p.Ser80= (c.240T>C) is classified Likely benign in F5 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-11-07). Very rare (popmax 6.56e-05%); Associated with congenital factor V deficiency.

What condition is associated with F5 p.Ser80= (c.240T>C)?

F5 p.Ser80= (c.240T>C) is associated with congenital factor V deficiency (ClinVar).

How common is F5 p.Ser80= (c.240T>C) in the general population?

F5 p.Ser80= (c.240T>C) is very rare (popmax 6.56e-05%) (gnomAD).

How is Congenital factor V deficiency inherited?

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

F5 p.Ser80=

c.240T>C · rs2526495636 · VCV3016939

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 6.56e-05%)

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 0.72	GERP -3.8, phastCons 0.98
Overall
CADD	6.366	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 6.56e-05%

Overall 6.56e-05% 1/1,524,766 alleles · very rare exomes 1/1,372,428 · genomes 0/152,338 · 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.Ser80=
Coding: c.240T>C
MANE Select: NM_000130
dbSNP: rs2526495636
Type: single nucleotide variant
Location: chr1:169582441 (GRCh38)
Gene constraint: LOEUF 0.704 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 62.57 · 23 PDB
Residue 80: an α-helix; the f5/8 type a 1 domain; the plastocyanin-like 1 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

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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
F5 p.Asp96His 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-ser80 (accessed [today's date]).

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