Is CSPP1 p.Val1132= (c.3396T>C) pathogenic?

CSPP1 p.Val1132= (c.3396T>C) is classified Likely benign in CSPP1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-02-03). Ultra-rare (popmax 0.0384%, sas); Associated with Joubert syndrome 21.

What condition is associated with CSPP1 p.Val1132= (c.3396T>C)?

CSPP1 p.Val1132= (c.3396T>C) is associated with Joubert syndrome 21 (ClinVar).

How common is CSPP1 p.Val1132= (c.3396T>C) in the general population?

CSPP1 p.Val1132= (c.3396T>C) is ultra-rare (popmax 0.0384%, sas) (gnomAD).

CSPP1 p.Val1132=

c.3396T>C · VCV3695770

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0384%, sas)

Conditions

Joubert syndrome 21

⚠ Built without this gene's context — gene constraint and dosage, protein structure, pathways, panels and related-variant links were not looked up for this page. why

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not looked up on this page · why
Constraint at this position
Conservation	phyloP -3.1	GERP -5.5
Overall
CADD	0.749	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0384% South Asian · 35/91,078 alleles

Filtering AF 0.0283% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0249%

Overall 0.00223% 36/1,613,100 alleles · ultra-rare exomes 34/1,460,920 · genomes 2/152,180 · joint denominator

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0384%	2,602
Remaining individualsnot grpmax-eligible	0.0016%	62,440

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: CSPP1
Protein: p.Val1132=
Coding: c.3396T>C
MANE Select: NM_001382391
Type: single nucleotide variant
Location: chr8:67193529 (GRCh38)

Full CSPP1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Joubert syndrome 21 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

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/cspp1-p-val1132 (accessed [today's date]).

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