Is MAP2 p.Ile1646Val (c.4936A>G) pathogenic?

MAP2 p.Ile1646Val (c.4936A>G) is classified Uncertain significance in MAP2 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-12-23). AlphaMissense: likely benign (0.1057); Very rare (popmax 0.00356%, nfe).

How common is MAP2 p.Ile1646Val (c.4936A>G) in the general population?

MAP2 p.Ile1646Val (c.4936A>G) is very rare (popmax 0.00356%, nfe) (gnomAD).

What do computational predictors say about MAP2 p.Ile1646Val (c.4936A>G)?

AlphaMissense predicts likely benign (score 0.1057) — an in-silico prediction, not a clinical call.

MAP2 p.Ile1646Val

c.4936A>G · VCV3870074

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1057 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00356%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1057	likely benign
REVEL	0.105	moderately benign-leaning
SaProt	LLR -4.96	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 9.4	GERP 2.6, phastCons 1
Overall
CADD	20.2	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00356% European (non-Finnish) · 42/1,180,018 alleles

Filtering AF 0.00267% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00236%

Overall 0.00285% 46/1,613,920 alleles · very rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.00356%	28,096
Ashkenazi Jewishnot grpmax-eligible	0.00338%	29,606
African / African-American	0.00267%	37,438
Finnishnot grpmax-eligible	0.00156%	64,026

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: MAP2
Protein: p.Ile1646Val
Coding: c.4936A>G
MANE Select: NM_001375505
Type: single nucleotide variant
Location: chr2:209710117 (GRCh38)
Structure: AlphaFold pLDDT 86.07 · 40 PDB

Full MAP2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

MAP2 p.Ala1074Thr Uncertain significance ★★ ⚠ same type
MAP2 p.Ala752Ser Uncertain significance ★★ ⚠ same type
MAP2 p.Arg1715His Uncertain significance ★★ ⚠ same type
MAP2 p.Val1359Ala Uncertain significance ★★ ⚠ same type
MAP2 p.Ala414Ser Benign/Likely benign ★★ same type
MAP2 p.Asp679= Benign ★★ same type
MAP2 p.Gln1760= Benign/Likely benign ★★ same type
MAP2 p.Glu1129= Benign ★★ 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/map2-p-ile1646val (accessed [today's date]).

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