Is HOOK2 p.Arg263His (c.788G>A) pathogenic?

HOOK2 p.Arg263His (c.788G>A) is classified Uncertain significance in HOOK2 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-12-17). AlphaMissense: likely benign (0.0653); Rare (popmax 0.119%, mid).

How common is HOOK2 p.Arg263His (c.788G>A) in the general population?

HOOK2 p.Arg263His (c.788G>A) is rare (popmax 0.119%, mid) (gnomAD).

What do computational predictors say about HOOK2 p.Arg263His (c.788G>A)?

AlphaMissense predicts likely benign (score 0.0653) — an in-silico prediction, not a clinical call.

HOOK2 p.Arg263His

c.788G>A · rs780475839 · VCV2371329

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0653 · ACMG-weighted

gnomAD v4.1

Rare

rare (popmax 0.119%, mid)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0653	likely benign
REVEL	0.156	moderately benign-leaning
SaProt	LLR -9.43	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 0.59	GERP -1.8, phastCons 0.11
Regional constraint	o/e 1.08	unconstrained · MANE · 5,167 bp · p 0.12 · regional, not allelic
Overall
CADD	17.68	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 0.119% Middle Eastern · 7/5,896 alleles

Filtering AF 0.0557% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0394%

Overall 0.00323% 52/1,611,934 alleles · rare exomes 46/1,459,622 · genomes 6/152,312 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.119%	842
Remaining individualsnot grpmax-eligible	0.0144%	6,928
South Asian	0.0143%	6,992
Ashkenazi Jewishnot grpmax-eligible	0.00339%	29,524
Admixed American	0.00334%	29,896
European (non-Finnish)	0.0017%	58,945

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: HOOK2
Protein: p.Arg263His
Coding: c.788G>A
MANE Select: NM_013312
dbSNP: rs780475839
Type: single nucleotide variant
Location: chr19:12771046 (GRCh38)
Gene constraint: LOEUF 1.16 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 82.81
Residue 263: the 'sufficient for interaction with microtubules' region

Full HOOK2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

HK2 p.Arg44Cys Uncertain significance ★★ ⚠ same type
HK2 p.Tyr515= Benign ★★ same type
HOOK2 c.519+7G>T Benign ★★ same type
HOOK2 p.Glu657Lys Likely benign ★★ ⚠ same type
HOOK2 p.Val445Leu Benign ★★ same type
HK2 p.Ala352Thr Uncertain significance ★ ⚠ same type
HK2 p.Ala383Thr Uncertain significance ★ ⚠ same type
HK2 p.Ala387Thr 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/hook2-p-arg263his (accessed [today's date]).

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