Is AMPD2 p.Pro179Leu (c.536C>T) pathogenic?

AMPD2 p.Pro179Leu (c.536C>T) is classified Uncertain significance in AMPD2 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-11-27). AlphaMissense: likely pathogenic (0.9244); Ultra-rare (popmax 0.0166%, mid); Associated with hereditary spastic paraplegia 63.

What condition is associated with AMPD2 p.Pro179Leu (c.536C>T)?

AMPD2 p.Pro179Leu (c.536C>T) is associated with hereditary spastic paraplegia 63, pontocerebellar hypoplasia type 9 (ClinVar).

How common is AMPD2 p.Pro179Leu (c.536C>T) in the general population?

AMPD2 p.Pro179Leu (c.536C>T) is ultra-rare (popmax 0.0166%, mid) (gnomAD).

How is Autosomal recessive spastic paraplegia type 63 inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

What do computational predictors say about AMPD2 p.Pro179Leu (c.536C>T)?

AlphaMissense predicts likely pathogenic (score 0.9244) — an in-silico prediction, not a clinical call.

AMPD2 p.Pro179Leu

c.536C>T · rs567095077 · VCV1466182

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9244 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0166%, mid)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

hereditary spastic paraplegia 63

Computational evidence

Protein change
AlphaMissense	0.9244	likely pathogenic
REVEL	0.253	benign-leaning
SaProt	LLR -5.74	tolerated
⇒ AlphaMissense calls this damaging; REVEL and SaProt do not.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · C>A here scores Δ0.33 · evaluated, not missing
Constraint at this position
Conservation	phyloP 7.6	GERP 1.6, phastCons 1
Regional constraint	o/e 0.89	unconstrained · MANE · 1,721 bp · p 0.065 · regional, not allelic
Overall
CADD	25.5	PHRED · no single calibrated threshold — expert panels disagree

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

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM P233L vs ClinVar P179L) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0166% Middle Eastern · 1/6,042 alleles

Filtering AF 0.00298% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0018%

Overall 0.000496% 8/1,612,290 alleles · ultra-rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0166%	6,042
East Asian	0.00892%	11,217
Remaining individualsnot grpmax-eligible	0.0016%	62,396
European (non-Finnish)	0.00017%	589,477

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: AMPD2
Protein: p.Pro179Leu
Coding: c.536C>T
MANE Select: NM_001368809
dbSNP: rs567095077
Type: single nucleotide variant
Location: chr1:109626730 (GRCh38)
Gene constraint: LOEUF 0.705 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 81.28 · 5 PDB

Full AMPD2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hereditary spastic paraplegia 63 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: pontocerebellar hypoplasia type 9

For Autosomal recessive spastic paraplegia type 63 (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy

Similar variants

AMPD2 p.Pro179= Likely benign ★★ same residue
AMPD2 c.1698+1G>A Pathogenic/Likely pathogenic ★★ same condition
AMPD2 p.Arg353Ter Pathogenic/Likely pathogenic ★★ same condition
AMPD2 p.Arg449Ter Pathogenic/Likely pathogenic ★★ same condition
AMPD2 p.Arg620His Pathogenic/Likely pathogenic ★★ same condition
AMPD2 p.Arg789His Likely pathogenic ★★ same condition
AMPD2 p.Glu174Ter Pathogenic/Likely pathogenic ★★ same condition
AMPD2 c.1080+3G>A Uncertain significance ★★ 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/ampd2-p-pro179leu (accessed [today's date]).

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