Is PRDM16 p.Ser642= (c.1926C>T) pathogenic?

PRDM16 p.Ser642= (c.1926C>T) is classified Likely benign in PRDM16 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2024-10-30). Ultra-rare (popmax 0.0171%, mid); Associated with left ventricular noncompaction 8.

What condition is associated with PRDM16 p.Ser642= (c.1926C>T)?

PRDM16 p.Ser642= (c.1926C>T) is associated with left ventricular noncompaction 8 (ClinVar).

How common is PRDM16 p.Ser642= (c.1926C>T) in the general population?

PRDM16 p.Ser642= (c.1926C>T) is ultra-rare (popmax 0.0171%, mid) (gnomAD).

How is Left ventricular noncompaction inherited?

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

PRDM16 p.Ser642=

c.1926C>T · rs369294573 · VCV700431

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0171%, mid)

Conditions

left ventricular noncompaction 8

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 -4.3	GERP -4.8
Overall
CADD	2.356	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0171% Middle Eastern · 1/5,842 alleles

Filtering AF 0.00259% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00165%

Overall 0.00243% 38/1,566,266 alleles · ultra-rare exomes 31/1,414,118 · genomes 7/152,148 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0171%	5,842
African / African-American	0.00682%	14,662
South Asian	0.0036%	27,783
Remaining individualsnot grpmax-eligible	0.00332%	30,103
European (non-Finnish)	0.00225%	44,475
Admixed American	0.00185%	54,026

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: PRDM16
Protein: p.Ser642=
Coding: c.1926C>T
MANE Select: NM_022114
dbSNP: rs369294573
Type: single nucleotide variant
Location: chr1:3412123 (GRCh38)
Gene constraint: LOEUF 0.304 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 51.73 · 2 PDB
Residue 642: the 'disordered' region

Full PRDM16 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

left ventricular noncompaction 8 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Left ventricular noncompaction (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive, Mitochondrial inheritance
Onset: All ages

Similar variants

PRDM16 c.388-2A>G Uncertain significance ★★ same condition
PRDM16 p.Ala1035Ser Uncertain significance ★★ ⚠ same condition
PRDM16 p.Ala106Thr Uncertain significance ★★ ⚠ same condition
PRDM16 p.Ala1096Thr Uncertain significance ★★ ⚠ same condition
PRDM16 p.Ala1096Val Uncertain significance ★★ ⚠ same condition
PRDM16 p.Ala1146Thr Uncertain significance ★★ ⚠ same condition
PRDM16 p.Ala175Val Uncertain significance ★★ ⚠ same condition
PRDM16 p.Ala34Val Uncertain significance ★★ ⚠ 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/prdm16-p-ser642 (accessed [today's date]).

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