Trait

C1-C2 subluxation

A partial dislocation of the atlantoaxial joints.

Body system: Abnormality of the musculoskeletal system

This page as data

Add .json to the page's address, or ask for application/json, to read it as JSON.

library(jsonlite)

url <- "https://dantelabs.com/traits/c1-c2-subluxation.json"
page <- fromJSON(url)
page$trait$name

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7 genes linked to C1-C2 subluxation

Changes in these genes cause rare conditions in which C1-C2 subluxation is seen. Most people with this trait have none of those conditions, and a gene on this list says nothing about anyone's own genome.

Gene	How often it is seen	Conditions
GNPTABN-acetylglucosamine-1-phosphate transferase subunits alpha and beta	Always	In 1 condition
DDR2discoidin domain receptor tyrosine kinase 2	Often (30–79%)	In 1 condition
IDUAalpha-L-iduronidase	Often (30–79%)	In 1 condition
MMP2matrix metallopeptidase 2	Often (30–79%)	In 1 condition
ARSLarylsulfatase L	Sometimes (5–29%)	In 1 condition
MADDMAP kinase activating death domain	Sometimes (5–29%)	In 1 condition
COL2A1collagen type II alpha 1 chain	Not recorded	In 1 condition

How often is among people with one of the gene's conditions, the most often across them, as the Human Phenotype Ontology records it. These pages describe traits and the research behind them; they are not a diagnosis, and a doctor or genetic counsellor is the person to ask about symptoms.

Broader traits

C1-C2 vertebral abnormality Cervical subluxation

Where this comes from

The Human Phenotype Ontology, release 2026-09-01: the trait, its names, its definition and the genes linked to it. Find out more at hpo.jax.org.
Data release 2026.10.16-c6eea6bf.

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