EXPRESSION OF ANCHORIN-CII, A COLLAGEN-BINDING PROTEIN OF THE ANNEXIN FAMILY, IN THE DEVELOPING CHICK-EMBRYO

被引:17
作者
HOFMANN, C [1 ]
GROPP, R [1 ]
VONDERMARK, K [1 ]
机构
[1] UNIV ERLANGEN NURNBERG,INST CLIN IMMUNOL & RHEUMATOL,MAX PLANCK SOC,CLIN RES UNITS,W-8520 ERLANGEN,GERMANY
关键词
D O I
10.1016/0012-1606(92)90179-K
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Expression of anchorin CII, a collagen-binding protein of the annexin family, was followed in the developing chick embryo using Northern and in situ hybridization and Western blotting. During chick somite development, anchorin CII mRNA was detected by Northern blotting as early as stage 11. At stage 24, anchorin mRNA accumulated in the anterior part of the somite sclerotome near the resegmentation line, as shown by in situ hybridization. The presence of anchorin CII protein during stages 11 to 20 was confirmed by Western blotting. In situ hybridization identified anchorin CII also in the otic vesicle adjacent to the site of contact with the statoacoustic ganglion and in the mandibular mesenchyme. The level of anchorin CII mRNA in differentiated hyaline cartilage, exemplified by sternal cartilage, was lower than that in differentiating somites or cultured chondrocytes. These findings are consistent with our notion that anchorin CII may be involved in cell-matrix interactions preceding chondrogenic differentiation events in the chick embryo. A significant level of anchorin CII mRNA and protein synthesis was also found in cultured myoblasts, but less than that in chondroblasts. This distribution pattern is different from that reported for a related protein, p34, or calpactin, the major protein substrate for tyrosine kinase phosphorylation in chick chondrocytes and fibroblasts. The results confirm suggestions from previous sequencing studies that anchorin CII and p34 are different proteins of the annexin/calpactin family. © 1992.
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页码:391 / 400
页数:10
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