Is F8 p.Val103Ala (c.308T>C) pathogenic?

F8 p.Val103Ala (c.308T>C) is classified Likely pathogenic in F8 (ClinVar, No assertion criteria, 1 submitter). AlphaMissense: ambiguous (0.5246); Absent from gnomAD v4.1; Associated with hemophilia A.

What condition is associated with F8 p.Val103Ala (c.308T>C)?

F8 p.Val103Ala (c.308T>C) is associated with hemophilia A (ClinVar).

How common is F8 p.Val103Ala (c.308T>C) in the general population?

F8 p.Val103Ala (c.308T>C) is absent from gnomAD v4.1 (gnomAD).

How is Hemophilia A inherited?

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

What do computational predictors say about F8 p.Val103Ala (c.308T>C)?

AlphaMissense predicts ambiguous (score 0.5246) — an in-silico prediction, not a clinical call.

F8 p.Val103Ala

c.308T>C · rs2073621465 · VCV1684384

Likely pathogenic No assertion criteria

Classification

Likely pathogenic

ClinVar

Review

No assertion criteria ☆☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.5246 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

2/2 damaging

REVEL, SaProt · AlphaMissense indeterminate

Conditions

hemophilia A

Computational evidence

Protein change
AlphaMissense	0.5246	ambiguous
REVEL	0.936	strongly pathogenic-leaning
SaProt	LLR -13.47	damaging
⇒ REVEL and SaProt both call this damaging; AlphaMissense is indeterminate.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 11	GERP 1.4, phastCons 1
Regional constraint	o/e 0.56	unconstrained · MANE · 53 kb · p 1.5e-11 · regional, not allelic
Overall
CADD	25.0	PHRED · no single calibrated threshold — expert panels disagree

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: F8
Protein: p.Val103Ala
Coding: c.308T>C
MANE Select: NM_000132
dbSNP: rs2073621465
Type: single nucleotide variant
Location: chrX:154997053 (GRCh38)
Structure: AlphaFold pLDDT 61.20 · 29 PDB
Residue 103: a β-strand; the f5/8 type a 1 domain; the plastocyanin-like 1 domain

Full F8 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hemophilia A — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Hemophilia A (Orphanet):

Inheritance: X-linked recessive
Onset: Childhood, Infancy, Neonatal
Prevalence: 1-9 / 100 000 (Worldwide)

Similar variants

H2AB1 p.Asn103Asp Likely benign ★ same residue
F8 c.6429+2T>A Pathogenic ★★★ same condition
F8 p.Ala111Thr Likely pathogenic ★★★ same condition
F8 p.Ala2220Pro Pathogenic ★★★ same condition
F8 p.Ala415Asp Likely pathogenic ★★★ same condition
F8 p.Ala415Val Pathogenic ★★★ ⚠ same condition
F8 p.Arg1768His Pathogenic ★★★ ⚠ same condition
F8 p.Arg1800His 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/f8-p-val103ala (accessed [today's date]).

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