Is DYNC2I2 p.Ser76= (c.228C>T) pathogenic?

DYNC2I2 p.Ser76= (c.228C>T) is classified Likely benign in DYNC2I2 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2025-12-03). Ultra-rare (popmax 0.0331%, mid); Associated with short-rib thoracic dysplasia 11 with or without polydactyly.

What condition is associated with DYNC2I2 p.Ser76= (c.228C>T)?

DYNC2I2 p.Ser76= (c.228C>T) is associated with short-rib thoracic dysplasia 11 with or without polydactyly (ClinVar).

How common is DYNC2I2 p.Ser76= (c.228C>T) in the general population?

DYNC2I2 p.Ser76= (c.228C>T) is ultra-rare (popmax 0.0331%, mid) (gnomAD).

DYNC2I2 p.Ser76=

c.228C>T · rs143075961 · VCV707253

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0331%, mid)

Conditions

short-rib thoracic dysplasia 11 with or without polydactyly

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 -4.8	GERP -3
Overall
CADD	0.42	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0331% Middle Eastern · 2/6,046 alleles

Filtering AF 0.00912% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00703%

Overall 0.00815% 131/1,607,298 alleles · ultra-rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0331%	3,023
Admixed American	0.0169%	5,912
Remaining individualsnot grpmax-eligible	0.0145%	6,912
European (non-Finnish)	0.00893%	11,200
African / African-American	0.00401%	24,909
Ashkenazi Jewishnot grpmax-eligible	0.00342%	29,248
South Asian	0.0011%	90,668

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: DYNC2I2
Protein: p.Ser76=
Coding: c.228C>T
MANE Select: NM_052844
dbSNP: rs143075961
Type: single nucleotide variant
Location: chr9:128640898 (GRCh38)
Gene constraint: LOEUF 1.036 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 82.66 · 4 PDB

Full DYNC2I2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

short-rib thoracic dysplasia 11 with or without polydactyly — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

DYNC2I2 c.1372+1G>A Pathogenic/Likely pathogenic ★★ same condition
DYNC2I2 p.Arg121Ter Pathogenic ★★ same condition
DYNC2I2 p.Arg182Trp Pathogenic/Likely pathogenic ★★ ⚠ same condition
DYNC2I2 p.Arg447Trp Pathogenic/Likely pathogenic ★★ same condition
DYNC2I2 p.Ala131Val Uncertain significance ★★ ⚠ same condition
DYNC2I2 p.Ala13Gly Uncertain significance ★★ ⚠ same condition
DYNC2I2 p.Ala219Thr Uncertain significance ★★ ⚠ same condition
DYNC2I2 p.Ala369Val 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/dync2i2-p-ser76 (accessed [today's date]).

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