Is CHRND p.Pro307= (c.921C>T) pathogenic?

CHRND p.Pro307= (c.921C>T) is classified Likely benign in CHRND (ClinVar, Single submitter, 1 submitter; last evaluated 2022-03-08). Absent from gnomAD v4.1; Associated with lethal multiple pterygium syndrome.

What condition is associated with CHRND p.Pro307= (c.921C>T)?

CHRND p.Pro307= (c.921C>T) is associated with lethal multiple pterygium syndrome (ClinVar).

How common is CHRND p.Pro307= (c.921C>T) in the general population?

CHRND p.Pro307= (c.921C>T) is absent from gnomAD v4.1 (gnomAD).

CHRND p.Pro307=

c.921C>T · rs1691694178 · VCV1606409

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

lethal multiple pterygium syndrome

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 -4.2	GERP -4.3
Overall
CADD	1.133	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: CHRND
Protein: p.Pro307=
Coding: c.921C>T
MANE Select: NM_000751
dbSNP: rs1691694178
Type: single nucleotide variant
Location: chr2:232531452 (GRCh38)
Gene constraint: LOEUF 0.848 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 84.21 · 25 PDB

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

Disease context

lethal multiple pterygium syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

CHRND p.Pro307Leu Uncertain significance ★★ ⚠ same residue
CHRND c.1252+1G>A Pathogenic/Likely pathogenic ★★ same condition
CHRND c.821-2A>C Pathogenic/Likely pathogenic ★★ same condition
CHRND c.933-2A>G Likely pathogenic ★★ same condition
CHRND p.Arg336Gln Likely pathogenic ★★ same condition
CHRND p.Arg43Trp Pathogenic/Likely pathogenic ★★ same condition
CHRND p.Cys257Arg Pathogenic/Likely pathogenic ★★ same condition
CHRND p.Trp78Ter 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/chrnd-p-pro307 (accessed [today's date]).

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