Is JPH2 p.Ser101= (c.303C>T) pathogenic?

JPH2 p.Ser101= (c.303C>T) is classified Likely benign in JPH2 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-07-21). Very rare (popmax 0.000339%, nfe); Associated with Cardiovascular phenotype.

What condition is associated with JPH2 p.Ser101= (c.303C>T)?

JPH2 p.Ser101= (c.303C>T) is associated with Cardiovascular phenotype (ClinVar).

How common is JPH2 p.Ser101= (c.303C>T) in the general population?

JPH2 p.Ser101= (c.303C>T) is very rare (popmax 0.000339%, nfe) (gnomAD).

JPH2 p.Ser101=

c.303C>T · rs1476594018 · VCV1799134

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.000339%, nfe)

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 7.5	GERP 1.8, phastCons 1
Overall
CADD	13.21	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000339% European (non-Finnish) · 4/1,179,976 alleles

Filtering AF 7.9e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 5.4e-05%

Overall 0.000248% 4/1,613,794 alleles · very rare exomes 4/1,461,616 · genomes 0/152,178 · joint denominator

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: JPH2
Protein: p.Ser101=
Coding: c.303C>T
MANE Select: NM_020433
dbSNP: rs1476594018
Type: single nucleotide variant
Location: chr20:44186403 (GRCh38)
Gene constraint: LOEUF 1.051 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 65.09 · 2 PDB
Residue 101: a UniProt-annotated variant site (in cmh17; modifies the secondary structure of the protein which is more flexible but does not undergo structural transition upon binding to membrane lipids; increases the affinity for phosphatidylserine; affects intracellular calcium handling and homeostasis); a β-strand

Full JPH2 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

Similar variants

JPH2 p.Ser101Asn Uncertain significance ★★ ⚠ same residue
JPH2 p.Ser101Arg Pathogenic ⚠ same residue
JPH2 c.-4T>A Uncertain significance ★★ same condition
JPH2 p.Ala214Glu Uncertain significance ★★ ⚠ same condition
JPH2 p.Ala23Thr Uncertain significance ★★ ⚠ same condition
JPH2 p.Ala23Val Uncertain significance ★★ ⚠ same condition
JPH2 p.Ala394Thr Uncertain significance ★★ ⚠ same condition
JPH2 p.Ala401Val 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/jph2-p-ser101 (accessed [today's date]).

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