NBAS p.Thr838=
c.2514G>A · rs777864312 · VCV1991935
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0373%, sas)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.019 | moderately benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | — | not assessed · no allele here is in the release |
| Constraint at this position | ||
| Conservation | phyloP -20 | GERP -3.4 |
| Overall | ||
| CADD | 0.095 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0373%
South Asian · 34/91,080 alleles
Filtering AF
0.0274%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.024%
Overall
0.0031%
50/1,613,962 alleles · ultra-rare
exomes 48/1,461,820 · genomes 2/152,142 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| South Asiangrpmax | 0.0373% | 2,679 |
| Remaining individualsnot grpmax-eligible | 0.0048% | 20,827 |
| European (non-Finnish) | 0.0011% | 90,769 |
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
- NBAS
- Protein
- p.Thr838=
- Coding
- c.2514G>A
- MANE Select
- NM_015909
- dbSNP
- rs777864312
- Type
- single nucleotide variant
- Location
- chr2:15424378 (GRCh38)
- Gene constraint
- LOEUF 0.761 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
- Structure
- AlphaFold pLDDT 74.42
- Residue 838
- a UniProt-annotated variant site (in ilfs2; uncertain significance); a UniProt-annotated variant site (found in a patient with a multisystem disease involving liver, eye, immune system, connective tissue and bone; uncertain significance); a UniProt-annotated variant site (found in a patient with a multisystem disease involving liver, eye, immune system, connective tissue and bone; uncertain significance; reduced protein expression levels in fibroblasts); the 'interaction with use1' region
Similar variants
- NBAS p.Thr838Ala Likely benign ★ ⚠ same residue
- NBAS p.Thr838Met Likely benign ★ ⚠ same residue
- NBAS p.Thr838fs Pathogenic ★ same residue
- NBAS c.1726-2A>G Likely pathogenic ★★ same type
- NBAS c.173-2A>G Likely pathogenic ★★ same type
- NBAS c.209+2T>G Pathogenic/Likely pathogenic ★★ same type
- NBAS c.2423+404G>C Likely pathogenic ★★ same type
- NBAS c.335+1G>C Pathogenic/Likely pathogenic ★★ same type
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/nbas-p-thr838 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown