MAP1B p.Asp738=
c.2214C>T · VCV4970706
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
ultra-rare (popmax 0.0187%, afr)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Splicing | ||
| SpliceAI | <0.2 | no splice effect predicted · four deltas, not one · how we know |
|---|---|---|
| Constraint at this position | ||
| Conservation | phyloP -0.81 | GERP -4.8 |
| Overall | ||
| CADD | 3.205 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0187%
African / African-American · 14/74,682 alleles
Filtering AF
0.0112%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00907%
Overall
0.00806%
130/1,612,300 alleles · ultra-rare
exomes 119/1,460,204 · genomes 11/152,096 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.0187% | 5,334 |
| East Asian | 0.0178% | 5,609 |
| Remaining individualsnot grpmax-eligible | 0.0112% | 8,911 |
| European (non-Finnish) | 0.00771% | 12,964 |
| Ashkenazi Jewishnot grpmax-eligible | 0.00677% | 14,778 |
| South Asian | 0.00663% | 15,093 |
| Admixed American | 0.00335% | 29,815 |
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
- MAP1B
- Protein
- p.Asp738=
- Coding
- c.2214C>T
- MANE Select
- NM_005909
- Type
- single nucleotide variant
- Location
- chr5:72195569 (GRCh38)
- Gene constraint
- LOEUF 0.105 · pLI 1.00 (gnomAD)
- Structure
- AlphaFold pLDDT 46.18
- Residue 738
- the 'disordered' region; a UniProt-annotated variant site (in pvnh9)
Similar variants
- MAP1B p.Asp738Tyr Uncertain significance ★ ⚠ same residue
- MAP1B p.Arg1664Ter Pathogenic/Likely pathogenic ★★ same type
- MAP1B p.Arg2140Ter Pathogenic ★★ same type
- MAP1B p.Arg303Ter Pathogenic/Likely pathogenic ★★ same type
- MAP1B p.Arg85Ter Pathogenic/Likely pathogenic ★★ same type
- MAP1B p.Arg999Ter Pathogenic/Likely pathogenic ★★ same type
- MAP1B p.Ala966Val Uncertain significance ★★ ⚠ same type
- MAP1B p.Arg1399Cys Uncertain significance ★★ ⚠ 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/map1b-p-asp738 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown