Coding
ModA

Part:BBa_K1405002

Designed by: Xuan Wang,Yuelong Hou   Group: iGEM14_BNU-China   (2014-10-02)
Revision as of 13:51, 17 October 2014 by WasonWang (Talk | contribs) (Created page with "ModA Background modA a periplasmic binding protein, . had a affinity (Km) for molybdate of 3–5 mM, this is one of the highest substrate Kd values reported for any periplasmic b...")

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ModA Background modA a periplasmic binding protein, . had a affinity (Km) for molybdate of 3–5 mM, this is one of the highest substrate Kd values reported for any periplasmic binding protein, the BBa_K1405002 contains the ModA coding sequence. And we used pET-21a BL21 to express and use His-chelating chromatography to purify.

Results

Expression and purification of ModA. Expression of ModA and its purification by His-chelating chromatography. Lane 1, molecular weight standards (kDa); lane 2, total bacterial proteins before IPTG induction; lane 3, total bacterial proteins after 0.5 mM IPTG induction; lane 4, total bacterial lysate after 0.5 mM IPTG induction; lane 5,the sediment after 16,000 rpm 30 min; lane 6 the flow through of column loading; lane 7,the flow of buffer B .lane 8 The purification of ModA by size-elution chromatography.


Native-PAGE to provide the molybdate lane 1, the modA(acetic buffer PH 5.0); lane 2, the modA incubate with 20mM molybdate.

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