ALG6 c.82+18G>A
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Not reported
no allele count reported in gnomAD v4.1 (AN 1,544,018)
Conditions
1
ALG6-congenital disorder of glycosylation 1C
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Splicing | ||
| Splice region | donor +18 | near-intronic (+18 nt from the splice site) |
|---|---|---|
| SpliceAI | — | not assessed · no allele here is in the release |
| Constraint at this position | ||
| Conservation | phyloP 0.27 | GERP -1.6, phastCons 0.022 |
| Non-coding constraint | Z 1.15 | 1 kb window · o/e 0.92 · regional · uncalibrated |
| Overall | ||
| CADD | 1.986 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
No allele count reported in gnomAD v4.1 (AN 1,544,018). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.
Variant & gene context
- Gene
- ALG6
- Coding
- c.82+18G>A
- MANE Select
- NM_013339
- dbSNP
- rs1234798604
- Type
- single nucleotide variant
- Location
- chr1:63371077 (GRCh38)
- Gene constraint
- LOEUF 0.892 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
- Structure
- AlphaFold pLDDT 93.08
Disease context
ALG6-congenital disorder of glycosylation 1C — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatmentsFor ALG6-CDG (Orphanet):
- Inheritance
- Autosomal recessive
- Onset
- Infancy, Neonatal
Similar variants
- ALG6 c.1128-1G>A Likely pathogenic ★★ same condition
- ALG6 c.1128-2A>C Likely pathogenic ★★ same condition
- ALG6 c.1326+1G>A Pathogenic/Likely pathogenic ★★ same condition
- ALG6 c.257+5G>A Pathogenic/Likely pathogenic ★★ same condition
- ALG6 c.429+1G>T Likely pathogenic ★★ same condition
- ALG6 c.495-2A>G Likely pathogenic ★★ same condition
- ALG6 c.495-2A>T Likely pathogenic ★★ same condition
- ALG6 c.680+1G>A Pathogenic/Likely 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/alg6-c-82-plus-18g-a (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown