Is F5 p.Ala28= (c.84G>A) pathogenic?

F5 p.Ala28= (c.84G>A) is classified Likely benign in F5 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-24). Very rare (popmax 0.00267%, afr); Associated with congenital factor V deficiency.

What condition is associated with F5 p.Ala28= (c.84G>A)?

F5 p.Ala28= (c.84G>A) is associated with congenital factor V deficiency (ClinVar).

How common is F5 p.Ala28= (c.84G>A) in the general population?

F5 p.Ala28= (c.84G>A) is very rare (popmax 0.00267%, afr) (gnomAD).

How is Congenital factor V deficiency inherited?

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

F5 p.Ala28=

c.84G>A · rs764411860 · VCV2891254

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00267%, afr)

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 -5.4	GERP -3.8
Overall
CADD	0.607	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00267% African / African-American · 2/74,936 alleles

Filtering AF 0.000443% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000166%

Overall 0.000372% 6/1,614,044 alleles · very rare exomes 4/1,461,850 · genomes 2/152,194 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00267%	37,468
South Asian	0.0011%	91,084
European (non-Finnish)	0.000254%	393,345

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.Ala28=
Coding: c.84G>A
MANE Select: NM_000130
dbSNP: rs764411860
Type: single nucleotide variant
Location: chr1:169586303 (GRCh38)
Gene constraint: LOEUF 0.704 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 62.57 · 23 PDB

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.Ala28Thr 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-ala28 (accessed [today's date]).

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