Is CEP104 p.Ala617= (c.1851C>T) pathogenic?

CEP104 p.Ala617= (c.1851C>T) is classified Likely benign in CEP104 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2026-01-22). Ultra-rare (popmax 0.0282%, nfe); Associated with Joubert syndrome 25.

What condition is associated with CEP104 p.Ala617= (c.1851C>T)?

CEP104 p.Ala617= (c.1851C>T) is associated with Joubert syndrome 25 (ClinVar).

How common is CEP104 p.Ala617= (c.1851C>T) in the general population?

CEP104 p.Ala617= (c.1851C>T) is ultra-rare (popmax 0.0282%, nfe) (gnomAD).

CEP104 p.Ala617=

c.1851C>T · rs150585805 · VCV1661013

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0282%, nfe)

Conditions

Joubert syndrome 25

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 0.21	GERP -0.34, phastCons 0.9
Overall
CADD	9.823	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0282% European (non-Finnish) · 333/1,179,722 alleles

Filtering AF 0.0257% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0247%

Overall 0.0218% 351/1,613,560 alleles · ultra-rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.0282%	3,543
Remaining individualsnot grpmax-eligible	0.0096%	10,413
Ashkenazi Jewishnot grpmax-eligible	0.00676%	14,800
African / African-American	0.00534%	18,715
South Asian	0.00329%	30,351
Finnishnot grpmax-eligible	0.00313%	31,999
Admixed American	0.00167%	59,976

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: CEP104
Protein: p.Ala617=
Coding: c.1851C>T
MANE Select: NM_014704
dbSNP: rs150585805
Type: single nucleotide variant
Location: chr1:3829983 (GRCh38)
Gene constraint: LOEUF 0.851 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 76.75 · 2 PDB
Residue 617: a UniProt-annotated variant site (in mrt77); an α-helix

Full CEP104 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Joubert syndrome 25 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

CEP104 p.Arg299Ter Pathogenic/Likely pathogenic ★★ same condition
CEP104 p.Arg55Ter Pathogenic/Likely pathogenic ★★ same condition
CEP104 p.Glu627Ter Pathogenic/Likely pathogenic ★★ same condition
CEP104 p.Lys270Ter Pathogenic/Likely pathogenic ★★ same condition
CEP104 p.Tyr253Ter Pathogenic/Likely pathogenic ★★ same condition
CEP104 c.1120-5T>A Uncertain significance ★★ same condition
CEP104 p.Ala269Thr Uncertain significance ★★ ⚠ same condition
CEP104 p.Ala28Val 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/cep104-p-ala617 (accessed [today's date]).

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