Is OFD1 p.Thr38= (c.114A>G) pathogenic?

OFD1 p.Thr38= (c.114A>G) is classified Likely benign in OFD1 (ClinVar, Single submitter, 1 submitter; last evaluated 2026-01-13). Very rare (popmax 0.00351%, sas); Associated with Joubert syndrome.

What condition is associated with OFD1 p.Thr38= (c.114A>G)?

OFD1 p.Thr38= (c.114A>G) is associated with Joubert syndrome, orofaciodigital syndrome I (ClinVar).

How common is OFD1 p.Thr38= (c.114A>G) in the general population?

OFD1 p.Thr38= (c.114A>G) is very rare (popmax 0.00351%, sas) (gnomAD).

OFD1 p.Thr38=

c.114A>G · VCV3757643

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00351%, sas)

Conditions

Joubert syndrome

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 -5.3	GERP -4.8
Overall
CADD	0.028	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00351% South Asian · 2/56,945 alleles

Filtering AF 0.000583% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000218%

Overall 0.000165% 2/1,209,655 alleles · very rare exomes 2/1,096,165 · genomes 0/113,490 · 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: OFD1
Protein: p.Thr38=
Coding: c.114A>G
MANE Select: NM_003611
Type: single nucleotide variant
Location: chrX:13736480 (GRCh38)
Structure: AlphaFold pLDDT 68.41

Full OFD1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

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

Also linked: orofaciodigital syndrome I

Similar variants

TRAPPC2 p.Asn38= Benign ★ same residue
OFD1 c.1411+1G>A Pathogenic ★★ same condition
OFD1 c.2600-1G>C Pathogenic/Likely pathogenic ★★ same condition
OFD1 p.Arg367Ter Pathogenic ★★ same condition
OFD1 p.Arg41Ter Pathogenic ★★ same condition
OFD1 p.Arg890Ter Pathogenic/Likely pathogenic ★★ same condition
OFD1 p.Arg909Ter Pathogenic/Likely pathogenic ★★ same condition
OFD1 p.Tyr87Cys Pathogenic ★★ ⚠ 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/ofd1-p-thr38 (accessed [today's date]).

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