Is AGPS c.*206T>C pathogenic?

AGPS c.206T>C is classified Uncertain significance in AGPS (ClinVar, Single submitter, 1 submitter; last evaluated 2018-01-13). Rare (popmax 0.572%, afr); Associated with rhizomelic chondrodysplasia punctata type 3.

What condition is associated with AGPS c.*206T>C?

AGPS c.*206T>C is associated with rhizomelic chondrodysplasia punctata type 3 (ClinVar).

How common is AGPS c.*206T>C in the general population?

AGPS c.*206T>C is rare (popmax 0.572%, afr) (gnomAD).

How is Rhizomelic chondrodysplasia punctata inherited?

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

AGPS c.*206T>C

rs74536999 · VCV332527

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

rare (popmax 0.572%, afr)

Conditions

rhizomelic chondrodysplasia punctata type 3

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 3.6	GERP 2, phastCons 1
Non-coding constraint	Z 2.88	1 kb window · o/e 0.79 · regional · uncalibrated
Overall
CADD	14.0	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.572% African / African-American · 306/53,508 alleles

Filtering AF 0.519% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.499%

Overall 0.0583% 342/586,124 alleles · rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.572%	175
Middle Eastern	0.0935%	1,069
Remaining individualsnot grpmax-eligible	0.0494%	2,024
Admixed American	0.047%	2,129
South Asian	0.0103%	9,673
European (non-Finnish)	0.000295%	338,780

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.*206T>C
MANE Select: NM_003659
dbSNP: rs74536999
Type: single nucleotide variant
Location: chr2:177538401 (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-star-206t-c (accessed [today's date]).

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