Is AP5Z1 p.Pro592Leu (c.1775C>T) pathogenic?

AP5Z1 p.Pro592Leu (c.1775C>T) is classified Uncertain significance in AP5Z1 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-03-15). AlphaMissense: likely benign (0.1017); Ultra-rare (popmax 0.0506%, mid); Associated with hereditary spastic paraplegia 48.

What condition is associated with AP5Z1 p.Pro592Leu (c.1775C>T)?

AP5Z1 p.Pro592Leu (c.1775C>T) is associated with hereditary spastic paraplegia 48 (ClinVar).

How common is AP5Z1 p.Pro592Leu (c.1775C>T) in the general population?

AP5Z1 p.Pro592Leu (c.1775C>T) is ultra-rare (popmax 0.0506%, mid) (gnomAD).

How is Autosomal recessive spastic paraplegia type 48 inherited?

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

What do computational predictors say about AP5Z1 p.Pro592Leu (c.1775C>T)?

AlphaMissense predicts likely benign (score 0.1017) — an in-silico prediction, not a clinical call.

AP5Z1 p.Pro592Leu

c.1775C>T · rs781462204 · VCV663487

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1017 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0506%, mid)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

hereditary spastic paraplegia 48

Computational evidence

Protein change
AlphaMissense	0.1017	likely benign
REVEL	0.121	moderately benign-leaning
SaProt	LLR -8.03	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 -0.086	GERP -3
Regional constraint	o/e 1.43	unconstrained · MANE · 16 kb · p 5.7e-46 · regional, not allelic
Overall
CADD	3.026	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 0.0506% Middle Eastern · 3/5,934 alleles

Filtering AF 0.0137% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00733%

Overall 0.00387% 60/1,550,496 alleles · ultra-rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0506%	1,978
Finnishnot grpmax-eligible	0.012%	8,353
Admixed American	0.0117%	8,524
East Asian	0.00488%	20,510
African / African-American	0.00411%	24,353
European (non-Finnish)	0.00314%	31,868
South Asian	0.00238%	42,014
Remaining individualsnot grpmax-eligible	0.00166%	60,094

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: AP5Z1
Protein: p.Pro592Leu
Coding: c.1775C>T
MANE Select: NM_014855
dbSNP: rs781462204
Type: single nucleotide variant
Location: chr7:4789899 (GRCh38)
Gene constraint: LOEUF 1.641 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 85.32

Full AP5Z1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hereditary spastic paraplegia 48 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Autosomal recessive spastic paraplegia type 48 (Orphanet):

Inheritance: Autosomal recessive
Onset: Adult

Similar variants

AP5Z1 p.Pro592= Likely benign ★★ same residue
AP5Z1 c.1312-2A>G Pathogenic/Likely pathogenic ★★ same condition
AP5Z1 c.1707+1G>A Likely pathogenic ★★ same condition
AP5Z1 c.1806-1G>C Likely pathogenic ★★ same condition
AP5Z1 p.Arg138Ter Pathogenic/Likely pathogenic ★★ same condition
AP5Z1 p.Arg310Ter Pathogenic/Likely pathogenic ★★ same condition
AP5Z1 p.Arg311Ter Pathogenic/Likely pathogenic ★★ same condition
AP5Z1 p.Arg345Ter Pathogenic/Likely pathogenic ★★ 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/ap5z1-p-pro592leu (accessed [today's date]).

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