Is TRPM4 p.Pro997= (c.2991C>T) pathogenic?

TRPM4 p.Pro997= (c.2991C>T) is classified Likely benign in TRPM4 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2025-06-29). Very rare (popmax 0.00672%, eas); Associated with Cardiovascular phenotype.

What condition is associated with TRPM4 p.Pro997= (c.2991C>T)?

TRPM4 p.Pro997= (c.2991C>T) is associated with Cardiovascular phenotype, progressive familial heart block type IB (ClinVar).

How common is TRPM4 p.Pro997= (c.2991C>T) in the general population?

TRPM4 p.Pro997= (c.2991C>T) is very rare (popmax 0.00672%, eas) (gnomAD).

TRPM4 p.Pro997=

c.2991C>T · rs149337483 · VCV1798530

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00672%, eas)

Conditions

Cardiovascular phenotype

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 -0.45
Overall
CADD	1.6	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00672% East Asian · 3/44,666 alleles

Filtering AF 0.00178% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000894%

Overall 0.00118% 19/1,613,562 alleles · very rare exomes 18/1,461,376 · genomes 1/152,186 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00672%	14,889
Admixed American	0.00167%	59,994
Finnishnot grpmax-eligible	0.00157%	63,770
European (non-Finnish)	0.00119%	84,289

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: TRPM4
Protein: p.Pro997=
Coding: c.2991C>T
MANE Select: NM_017636
dbSNP: rs149337483
Type: single nucleotide variant
Location: chr19:49202001 (GRCh38)
Gene constraint: LOEUF 1.084 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 78.51 · 42 PDB
Residue 997: a β-strand

Full TRPM4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Cardiovascular phenotype — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: progressive familial heart block type IB

Similar variants

TRPM4 p.Pro997His Uncertain significance ★★ ⚠ same residue
TRPM4 p.Ile1040Thr Pathogenic/Likely pathogenic ★★ same condition
TRPM4 p.Ile376Thr Pathogenic/Likely pathogenic ★★ ⚠ same condition
TRPM4 c.1050+1G>A Uncertain significance ★★ same condition
TRPM4 c.1150+5A>T Uncertain significance ★★ same condition
TRPM4 c.1150+6A>G Uncertain significance ★★ same condition
TRPM4 c.1263+1G>A Uncertain significance ★★ same condition
TRPM4 c.1263+2T>G 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/trpm4-p-pro997 (accessed [today's date]).

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