Is HAL p.Pro276Ser (c.826C>T) pathogenic?

HAL p.Pro276Ser (c.826C>T) is classified Uncertain significance in HAL (ClinVar, Single submitter, 1 submitter; last evaluated 2025-02-01). AlphaMissense: ambiguous (0.4647); Very rare (popmax 0.000496%).

How common is HAL p.Pro276Ser (c.826C>T) in the general population?

HAL p.Pro276Ser (c.826C>T) is very rare (popmax 0.000496%) (gnomAD).

What do computational predictors say about HAL p.Pro276Ser (c.826C>T)?

AlphaMissense predicts ambiguous (score 0.4647) — an in-silico prediction, not a clinical call.

HAL p.Pro276Ser

c.826C>T · VCV3856725

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.4647 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.000496%)

Missense predictors

1/2 damaging

REVEL, SaProt · AlphaMissense indeterminate

Computational evidence

Protein change
AlphaMissense	0.4647	ambiguous
REVEL	0.654	pathogenic-leaning
SaProt	LLR -8.56	tolerated
⇒ REVEL calls this damaging; SaProt does not; AlphaMissense is indeterminate.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 11	GERP 1.6, phastCons 1
Regional constraint	o/e 0.95	unconstrained · MANE · 22 kb · p 0.18 · regional, not allelic
Overall
CADD	27.8	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000496%

Overall 0.000496% 8/1,613,488 alleles · very rare exomes 7/1,461,296 · genomes 1/152,192 · joint denominator

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: HAL
Protein: p.Pro276Ser
Coding: c.826C>T
MANE Select: NM_002108
Type: single nucleotide variant
Location: chr12:95990422 (GRCh38)
Gene constraint: LOEUF 1.213 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 90.83

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

Similar variants

HAL p.Pro276Leu Uncertain significance ★ ⚠ same residue
HAL c.*392C>T Uncertain significance ★★ same type
HAL p.Arg9Cys Uncertain significance ★★ ⚠ same type
HAL p.Asn476Lys Uncertain significance ★★ ⚠ same type
HAL p.Glu472Lys Uncertain significance ★★ ⚠ same type
HAL p.Gly165Ser Uncertain significance ★★ ⚠ same type
HAL p.Ile458Thr Uncertain significance ★★ ⚠ same type
HAL p.Leu242Met 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/hal-p-pro276ser (accessed [today's date]).

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