Crystal structure of human collagen XVIII trimerization domain: A novel collagen trimerization Fold.

Crystal structure of human collagen XVIII trimerization domain: A novel collagen trimerization Fold.
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DOI:
10.1016/j.jmb.2009.07.057
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发表时间:
2009-09-25
影响因子:
5.6
通讯作者:
Bächinger HP
Bächinger HP
中科院分区:
生物学2区
文献类型:
--
作者:
Boudko SP;Sasaki T;Engel J;Lerch TF;Nix J;Chapman MS;Bächinger HP

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胶原蛋白具有独特的三重螺旋结构,具有重复序列-G-X-Y-,其中脯氨酸和羟脯氨酸分别是X和Y位置的主要成分。胶原蛋白三螺旋的折叠需要三聚化结构域。一旦三聚化,胶原蛋白链正确对齐,三螺旋的折叠以拉链样的方式进行。在这里,我们报告的分离,表征和晶体结构的三聚结构域的人XVIII型胶原蛋白,一个成员的多路复用蛋白家族。该结构域不同于其他胶原中所有其他已知的三聚化结构域,并且在皮摩尔浓度下表现出高的三聚化潜力。对于以非常低的水平存在的多路蛋白,需要强的链缔合和高特异性的结合。
Collagens contain a unique triple helical structure with a repeating sequence -G-X-Y-, where proline and hydroxyproline are major constituents in X and Y positions, respectively. Folding of the collagen triple helix requires trimerization domains. Once trimerized, collagen chains are correctly aligned and the folding of the triple helix proceeds in a zipper-like fashion. Here we report the isolation, characterization and crystal structure of the trimerization domain of human type XVIII collagen, a member of the multiplexin family. This domain differs from all other known trimerization domains in other collagens and exhibits a high trimerization potential at picomolar concentrations. Strong chain association and high specificity of binding are needed for multiplexins, which are present at very low levels.
DOI: 10.1107/s0907444904019158
发表时间: 2004-12-01
影响因子: 2.2
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