vitamin D binding protein precursor (353-363) [Homo sapiens]

人维生素D结合蛋白（HDBP）又被称为Gcglobulin，是由肝脏合成的一种丰富的、多功能的并且具有高度多态性的血清糖蛋白1。DBP是维生素D固醇类物质的主要血清转运蛋白2，高亲和力的结合并隔绝肌动蛋白单体3,4，存在于多种细胞的细胞膜上，包括B淋巴细胞、T淋巴细胞和胎盘的细胞滋养细胞。

DPB是一种分泌蛋白质，因此推测其具有一个信号序列。通过对cDNA和hDBP的氨基末端多肽进行序列比对，预测建立了成熟血清蛋白氨基末端的模型8。

 C₆₁H₉₉N₁₇O₁₆

Figure1. Structure of Vitamin D binding protein

Figure2. Formula of Vitamin D binding protein precursor (353-363)

参考文献：

1.Haddad, J. G. 1979. Transport of vitamin D metabolites. Clin. Orthop. Relat. Res. 142:249-274.

2.Daiger, S. P., M. S. Schanfield, and L. L. Cavalli-Sforza. 1975. Group specific component (Gc) proteins bind vitamin D and 25-hydroxyvitamin D. Proc. Natl. Acad. Sci. USA. 72:2076-2080.

3.Cooke, N. E., J. Walgate, and J. G. Haddad. 1979. Human serum binding protein for vitamin D and its metabolites. I. Physicochemical and immunological identification in human tissues. J. Biol. Chem. 254: 5965-5971.

4.Van Baelen, H., R. Bouillon, and P. DeMoor. 1980. Vitamin D binding protein (Gc-Globulin) binds actin. J. Biol. Chem. 255:2270-2272.

5.Petrini, M., D. L. Emerson, and R. M. Galbraith. 1983. Linkage between surface immunoglobulin and cytoskeleton of B lymphocytes may involve Gc protein. Nature (Lond.). 306:73-74.

6.Petrini, M., R. M. Galbraith, D. L. Emerson, A. E. Nel, and P. Arnaud. 1985. Structural studies of T lymphocyte Fc receptors. J. Biol. Chem. 260:1804-1810.

7.Nestler, J. E., E. Lange, J. McLeod, H. J. Kliman, and J. F. Strauss. 1985. Detection of vitamin D binding protein (DBP) in human cytotrophoblasts. Seventh Annual American Societyfor Bone and Mineral Research. Wash. DC. 266a. (Abstr.).

8.Svasti, J., A. Kurosky, A. Bennett, and B. H. Bowman. 1979. Molecular basis for the three major forms of human serum vitamin D binding protein (group specific component). Biochemistry. 18:1611-1617.