Is FH p.Leu112= (c.336T>C) pathogenic?

FH p.Leu112= (c.336T>C) is classified Benign/Likely benign in FH (ClinVar, Multiple submitters, 3 submitters; last evaluated 2025-12-07). Very rare (popmax 0.00167%, amr); Associated with hereditary neoplastic syndrome.

What condition is associated with FH p.Leu112= (c.336T>C)?

FH p.Leu112= (c.336T>C) is associated with hereditary neoplastic syndrome, hereditary leiomyomatosis and renal cell cancer (ClinVar).

How common is FH p.Leu112= (c.336T>C) in the general population?

FH p.Leu112= (c.336T>C) is very rare (popmax 0.00167%, amr) (gnomAD).

FH p.Leu112=

c.336T>C · rs1375102701 · VCV1730729

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00167%, amr)

Conditions

hereditary neoplastic syndrome

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 -0.003	GERP -3.9, phastCons 0.026
Overall
CADD	6.974	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00167% Admixed American · 1/60,018 alleles

Overall 0.000124% 2/1,614,154 alleles · very rare exomes 2/1,461,814 · genomes 0/152,340 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00167%	60,018
European (non-Finnish)	8.47e-05%	1,179,988

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: FH
Protein: p.Leu112=
Coding: c.336T>C
MANE Select: NM_000143
dbSNP: rs1375102701
Type: single nucleotide variant
Location: chr1:241513645 (GRCh38)
Gene constraint: LOEUF 0.599 · pLI 0.27 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 92.92 · 8 PDB

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

Disease context

hereditary neoplastic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hereditary leiomyomatosis and renal cell cancer

Similar variants

FH p.Leu112Pro Uncertain significance ★ ⚠ same residue
FH c.1108+1G>A Pathogenic ★★ same condition
FH c.1108+1G>T Pathogenic/Likely pathogenic ★★ same condition
FH c.1236+1G>A Pathogenic/Likely pathogenic ★★ same condition
FH c.1236+1G>C Pathogenic ★★ same condition
FH c.1236+2T>G Pathogenic ★★ same condition
FH c.1237-1G>T Likely pathogenic ★★ same condition
FH c.1390+1G>T 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/fh-p-leu112 (accessed [today's date]).

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