Is UNC13D p.Pro182= (c.546C>T) pathogenic?

UNC13D p.Pro182= (c.546C>T) is classified Likely benign in UNC13D (ClinVar, Single submitter, 1 submitter; last evaluated 2023-10-23). Ultra-rare (popmax 0.0165%, mid); Associated with familial hemophagocytic lymphohistiocytosis 3.

What condition is associated with UNC13D p.Pro182= (c.546C>T)?

UNC13D p.Pro182= (c.546C>T) is associated with familial hemophagocytic lymphohistiocytosis 3 (ClinVar).

How common is UNC13D p.Pro182= (c.546C>T) in the general population?

UNC13D p.Pro182= (c.546C>T) is ultra-rare (popmax 0.0165%, mid) (gnomAD).

How is Familial hemophagocytic lymphohistiocytosis inherited?

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

UNC13D p.Pro182=

c.546C>T · rs377079629 · VCV2739136

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0165%, mid)

Conditions

familial hemophagocytic lymphohistiocytosis 3

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP -9.3
Overall
CADD	4.565	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0165% Middle Eastern · 1/6,060 alleles

Filtering AF 0.00106% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000718%

Overall 0.00155% 25/1,613,022 alleles · ultra-rare exomes 23/1,460,664 · genomes 2/152,358 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0165%	6,060
African / African-American	0.004%	25,019
Remaining individualsnot grpmax-eligible	0.0032%	31,231
Admixed American	0.00167%	60,002
European (non-Finnish)	0.00144%	69,392
South Asian	0.0011%	91,030

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: UNC13D
Protein: p.Pro182=
Coding: c.546C>T
MANE Select: NM_199242
dbSNP: rs377079629
Type: single nucleotide variant
Location: chr17:75842456 (GRCh38)
Gene constraint: LOEUF 0.923 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 85.04 · 1 PDB
Residue 182: the c2 1 domain

Full UNC13D gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

familial hemophagocytic lymphohistiocytosis 3 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Familial hemophagocytic lymphohistiocytosis (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Infancy
Prevalence: 1-9 / 100 000 (Sweden)

Similar variants

UNC13D p.Pro182Ser Uncertain significance ★★ ⚠ same residue
UNC13D c.1055+1G>A Pathogenic/Likely pathogenic ★★ same condition
UNC13D c.118-307G>A Pathogenic ★★ same condition
UNC13D c.118-308C>T Pathogenic/Likely pathogenic ★★ same condition
UNC13D c.1389+1G>A Pathogenic ★★ same condition
UNC13D c.1596+1G>C Pathogenic ★★ same condition
UNC13D c.1727+1G>A Pathogenic/Likely pathogenic ★★ same condition
UNC13D c.1848+1G>A 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/unc13d-p-pro182 (accessed [today's date]).

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