Is AGPS c.1475+12A>G pathogenic?

AGPS c.1475+12A>G is classified Conflicting classifications of pathogenicity in AGPS (ClinVar, Conflicting submitters, 2 submitters; last evaluated 2026-02-02). Ultra-rare (popmax 0.0979%, sas); Associated with rhizomelic chondrodysplasia punctata type 3.

What condition is associated with AGPS c.1475+12A>G?

AGPS c.1475+12A>G is associated with rhizomelic chondrodysplasia punctata type 3 (ClinVar).

How common is AGPS c.1475+12A>G in the general population?

AGPS c.1475+12A>G is ultra-rare (popmax 0.0979%, sas) (gnomAD).

How is Rhizomelic chondrodysplasia punctata inherited?

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

AGPS c.1475+12A>G

rs375684020 · VCV892845

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0979%, sas)

Conditions

rhizomelic chondrodysplasia punctata type 3

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
Splice region	donor +12	near-intronic (+12 nt from the splice site)
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.59	GERP -0.31, phastCons 0.001
Non-coding constraint	Z 1.58	1 kb window · o/e 0.88 · regional · uncalibrated
Overall
CADD	7.086	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0979% South Asian · 87/88,894 alleles

Filtering AF 0.0812% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0751%

Overall 0.016% 241/1,506,338 alleles · ultra-rare

Ancestry group	Frequency	1 in
Ashkenazi Jewishnot grpmax-eligible	0.204%	489
South Asiangrpmax	0.0979%	1,022
Middle Eastern	0.0343%	2,916
Remaining individualsnot grpmax-eligible	0.0289%	3,463
European (non-Finnish)	0.00684%	14,628
Admixed American	0.00167%	59,842
African / African-American	0.00137%	72,840

Ashkenazi Jewish shows a higher raw frequency than the grpmax group above it. gnomAD excludes bottlenecked groups — Finnish, Ashkenazi Jewish, Amish and “Remaining individuals” — from grpmax, because founder effects make their frequencies unrepresentative for filtering. The table is sorted by frequency, so an excluded group can sit above the grpmax row.

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: AGPS
Coding: c.1475+12A>G
MANE Select: NM_003659
dbSNP: rs375684020
Type: single nucleotide variant
Location: chr2:177499742 (GRCh38)
Gene constraint: LOEUF 0.408 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 89.27

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

Disease context

rhizomelic chondrodysplasia punctata type 3 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Rhizomelic chondrodysplasia punctata (Orphanet):

Inheritance: Autosomal recessive
Onset: Antenatal, Neonatal
Prevalence: 1-9 / 1 000 000 (Europe)

Similar variants

AGPS p.Arg182Ter Pathogenic/Likely pathogenic ★★ same condition
AGPS p.Thr309Ile Likely pathogenic ★★ same condition
AGPS c.1855+6C>A Uncertain significance ★★ same condition
AGPS c.*118A>G Uncertain significance ★★ same condition
AGPS p.Asp28Val Uncertain significance ★★ ⚠ same condition
AGPS p.Pro415Leu Uncertain significance ★★ ⚠ same condition
AGPS p.Thr72Ala Uncertain significance ★★ ⚠ same condition
AGPS c.1233+14T>A Benign/Likely benign ★★ 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/agps-c-1475-plus-12a-g (accessed [today's date]).

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