Zhao G, Yuan C, Bian C, Hou X, Shi X, Ye X, Huang Z, Huang M. Protein expression and preliminary crystallographic analysis of amino-terminal fragment of urokinase-type plasminogen activator.
Protein Expr Purif 2006;
49:71-7. [PMID:
16806969 DOI:
10.1016/j.pep.2006.05.005]
[Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2006] [Revised: 04/28/2006] [Accepted: 05/09/2006] [Indexed: 10/24/2022]
Abstract
The amino-terminal fragment (ATF, Ser1-Glu143) of urokinase-type plasminogen activator (uPA) is responsible for some important functions of uPA, such as receptor binding and chemotactic activity. To dissect the function and structure-activity relationship of ATF, recombinant human ATF was expressed in Pichia pastoris system at a yield of about 30 mg/L. The recombinant ATF was captured by a cation exchange column, further purified up to 99% purity by a gel filtration column, and characterized in terms of its receptor binding capability. The purified ATF was then crystallized by the method of sitting-drop vapor diffusion with magnesium sulfate as the precipitating agent at 298 K. The crystals belong to space group P1 with unit cell dimensions of a=47.5A, b=64.7A, c=65.4A, alpha=71.6 degrees , beta=92.1 degrees , gamma=84.0 degrees .
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