Deinococcus Radiodurans表面氨基修饰对钙锶生物矿化自组装的影响  

Effect of the Surface Amino Modification of Deinococcus Radiodurans on Self-assembly of Calcium Strontium

作　　者：费正彬 刘明学[1,2] 黄婷[1] 何辉 郑天 黄茂迪 

机构地区：[1]西南科技大学生命科学与工程学院,绵阳621010 [2]西南科技大学固体废物处理与资源化教育部重点实验室,绵阳621010

出　　处：《人工晶体学报》2016年第1期259-266,共8页Journal of Synthetic Crystals

基　　金：国家自然科学基金(41272371);国家重点基础研究发展计划(973)(2014CB846003);NSAF项目(11176028);西南科技大学生命科学与工程学院大学生创新实践项目资助

摘　　要：研究中通过表面基团屏蔽探索耐辐射奇球菌表面氨基对钙锶生物矿化及其自组装过程的影响。结果表明:(1)在Deinococcus Radiodurans作用下,体系倾向于形成文石晶型;(2)屏蔽氨基后,氨基对方解石晶体的抑制作用消失,[Ca^(2+)]高时诱导晶体从文石转变为方解石,[Sr^(2+)]高时诱导晶体产生空壳结构;(3)在D.Radiodurans作用下,文石晶体的生长属于经典的棒-哑铃-球自组装模型;屏蔽氨基后,文石晶体的生长为球壳和哑铃空壳的空壳自组装过程。综上所述,耐辐射奇球菌表面氨基能促进晶型的转换,控制晶体的自组装。本研究结果可为阐释微生物诱导生物矿化自组装过程提供参考。The effect of surface amino groups of D.Radiodurans on calcium and strontium biomineralization and its self-assembly process was explored with surface group modification in this research.The results showed that:(1) the calcium carbonate crystal would form aragonite when adding D.Radiodurans in reaction system;(2) the inhibitory effect of amino group on calcite crystal disappears after amino group modification and high[Ca^(2+)]induces calcium carbonate to form calcite crystal,while high[Sr^(2+)]induces strontium carbonate crystal to form shell structure;(3) the growth of aragonite followes classical rod-dumbbell-ball self-assembly model but sphere or dumbbell shell self-assembly process after amino group modification.So,the surface amino group of D.Radiodurans could promote the transformation of the crystal type and control the crystal self-assembly process.These results could provide reference for illustration of biomineralization self-assembly process induced by microorganism.

关 键 词：生物矿化 自组装 耐辐射奇球菌 氨基修饰 锶离子 钙离子 

分 类 号：O78[理学—晶体学]