Identification, characterization and expression analysis of a new fibrillar collagen gene, COL27A1.
Matrix Biol
; 22(1): 3-14, 2003 Mar.
Article
en En
| MEDLINE
| ID: mdl-12714037
The fibrillar collagens provide structural scaffolding and strength to the extracellular matrices of connective tissues. We identified a partial sequence of a new fibrillar collagen gene in the NCBI databases and completed the sequence with bioinformatic approaches and 5' RACE. This gene, designated COL27A1, is approximately 156 kbp long and has 61 exons located on chromosome 9q32-33. The homologous mouse gene is located on chromosome 4. The gene encodes amino- and carboxyl-terminal propeptides similar to those in the 'minor' fibrillar collagens. The triple-helical domain is, however, shorter and contains 994 amino acids with two imperfections of the Gly-Xaa-Yaa repeat pattern. There were three sites of alternative RNA splicing, only one of which led to the intact mRNA that encodes this full-length collagen proalpha chain. Phylogenetic analyses indicated that COL27A1 forms a clade with COL24A1 that is distinct from the two known lineages of fibrillar collagens. Expression analyses of the mouse col27a1 gene demonstrated high expression in cartilage, the eye and ear, but also in lung and colon. It is likely that the major protein product of COL27A1, proalpha1(XXVII), is a component of the extracellular matrices of cartilage and these other tissues. Study of this collagen should yield insights into normal chondrogenesis, and provide clues to the pathogenesis of some chondrodysplasias and disorders of other tissues in which this gene is expressed.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Colágenos Fibrilares
Tipo de estudio:
Diagnostic_studies
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Matrix Biol
Asunto de la revista:
BIOLOGIA MOLECULAR
/
BIOQUIMICA
Año:
2003
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Países Bajos