The C. elegans hyaluronidase: a developmentally significant enzyme with chondroitin-degrading activity at both acidic and neutral pH.
Matrix Biol
; 29(6): 494-502, 2010 Jul.
Article
en En
| MEDLINE
| ID: mdl-20576486
ABSTRACT
Mammalian hyaluronidases degrade hyaluronan and some structurally related glycosaminoglycans. We generated a deletion mutant in the Caenorhabditis elegans orthologue of mammalian hyaluronidase, hya-1. Mutant animals are viable and grossly normal, but exhibit defects in vulval morphogenesis and egg-laying and showed increased staining with alcian blue, consistent with an accumulation of glycosaminoglycan. A hya-1GFP reporter was expressed in a restricted pattern in somatic tissues of the animal with strongest expression in the intestine, the PLM sensory neurons and the vulva. Total protein extracts from wild-type animals exhibited chondroitin-degrading but not hyaluronan-degrading activity. Chondroitinase activities were observed at both neutral and acidic pH conditions while both neutral and acidic activities were absent in extracts from hya-1 mutant strains. We also evaluated the function of oga-1, which encodes the C. elegans orthologue of MGEA-5, a protein with hyaluronan-degrading activity in vitro. oga-1 is expressed in muscles, vulval cells and the scavenger-like coelomocytes. An oga-1 mutant strain exhibited egg-laying and vulval defects similar to those of hya-1; chondroitinase activity was unaffected in this mutant.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Condroitín
/
Hialuronoglucosaminidasa
Límite:
Animals
Idioma:
En
Revista:
Matrix Biol
Asunto de la revista:
BIOLOGIA MOLECULAR
/
BIOQUIMICA
Año:
2010
Tipo del documento:
Article
País de afiliación:
Canadá