A specific collagen type II gene (COL2A1) mutation presenting as spondyloperipheral dysplasia.

Abstract

We report on a patient with a skeletal dysplasia characterized by short stature, spondylo-epiphyseal involvement, and brachydactyly E-like changes. This condition has been described as spondyloperipheral dysplasia and the few published cases suggest autosomal dominant inheritance with considerable clinical variability. We found our sporadic case to be due to a collagen type II defect resulting from a specific COL2A1 mutation. This mutation is the first to be located at the C-terminal outside the helical domain of COL2A1. A frameshift as consequence of a 5 bp duplication in exon 51 leads to a stop codon. The resulting truncated C-propeptide region seems to affect helix formation and produces changes of chondrocyte morphology, collagen type II fibril structure and cartilage matrix composition. Our case with its distinct phenotype adds another chondrodysplasia to the clinical spectrum of type II collagenopathies.

• Authors: B Zabel, K Hilbert, H Stöss, A Superti-Furga, J Spranger, A Winterpacht
• Journal: American journal of medical genetics (Am J Med Genet) Vol. 63 Issue 1 Pg. 123-8 (May 03 1996) ISSN: 0148-7299 [Print] United States
• PMID: 8723097 (Publication Type: Case Reports, Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Collagen
• DNA

Topics

• Amino Acid Sequence
• Base Sequence
• Bone Development
• Bone and Bones (diagnostic imaging, pathology)
• Collagen (genetics)
• DNA (blood)
• Endoplasmic Reticulum, Rough (pathology, ultrastructure)
• Exons
• Female
• Frameshift Mutation
• Growth Plate (pathology, ultrastructure)
• Humans
• Ilium
• Infant, Newborn
• Leukocytes (metabolism)
• Microscopy, Electron
• Molecular Sequence Data
• Osteochondrodysplasias (diagnostic imaging, genetics, pathology)
• Polymerase Chain Reaction
• Radiography