chromosome 21 open reading frame 2
The information on this page was automatically extracted from online scientific databases.
From NCBI Gene:
Four alternatively spliced transcript variants encoding four different isoforms have been found for this nuclear gene. All isoforms contain leucine-rich repeats. Three of these isoforms are mitochondrial proteins and one of them lacks the target peptide, so is not located in mitochondrion. This gene is down-regulated in Down syndrome (DS) brain, which may represent mitochondrial dysfunction in DS patients. [provided by RefSeq, Sep 2012]
May play a role in cilia formation and/or maintenance (By similarity). Plays a role in the regulation of cell morphology and cytoskeletal organization (PubMed:21834987).
Covered on Genetics Home Reference:
Defects in C21orf2 may be the cause of a autosomal recessive spondylometaphyseal dysplasia axial. Spondylometaphyseal dysplasia axial is a clinical subtype of spondylometaphyseal dysplasia, in which mainly axial skeleton and retina are affected. Affected individuals show postnatal growth deficiency, mild short stature, rhizomelic shortening of the limbs without bowing of the long bones of the legs, axial metaphyseal abnormalities with progressive mild platyspondyly, progressive femoral metaphyseal changes, decreased anteroposterior diameter of the thorax with markedly flared anterior ends of the ribs, normal tubular bones, and early onset and progressive visual impairment, with cone-rod dystrophy and/or optic atrophy.
Defects in C21orf2 may play a role in Jeune syndrome. Jeune syndrome is a form of short-rib thoracic dysplasia, a group of autosomal recessive ciliopathies that are characterized by a constricted thoracic cage, short ribs, shortened tubular bones, and a 'trident' appearance of the acetabular roof. Additional features include polydactyly, kidney cysts and renal failure, retinal degeneration and liver disease are variably present.