Streptavidin forms two-dimensional crystals when specifically bound to layers of biotinylated lipids at the air/water interface. The three-dimensional structure of streptavidin determined from the crystals by electron crystallography corresponds well with the structure determined by x-ray crystallography. Comparison of the electron and x-ray crystallographic structures reveals the occurrence of free biotin-binding sites on the surface of the two-dimensional crystals facing the aqueous solution. The free biotin-binding sites could be specifically labeled with biotinylated ferritin. The streptavidin/biotinylated lipid system may provide a general approach for the formation of two-dimensional crystals of biotinylated macromolecules.
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Sungkyunkwan Univ, Sch Chem Engn, Suwon 16419, South Korea
Sungkyunkwan Univ, Translat Nanobiosci Res Ctr, Suwon 16419, South KoreaSungkyunkwan Univ, Sch Chem Engn, Suwon 16419, South Korea
Sut, Tun Naw
Park, Hyeonjin
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Sungkyunkwan Univ, Sch Chem Engn, Suwon 16419, South Korea
Sungkyunkwan Univ, Translat Nanobiosci Res Ctr, Suwon 16419, South KoreaSungkyunkwan Univ, Sch Chem Engn, Suwon 16419, South Korea
Park, Hyeonjin
Koo, Dong Jun
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Sungkyunkwan Univ, Sch Chem Engn, Suwon 16419, South Korea
Sungkyunkwan Univ, Translat Nanobiosci Res Ctr, Suwon 16419, South KoreaSungkyunkwan Univ, Sch Chem Engn, Suwon 16419, South Korea
Koo, Dong Jun
Yoon, Bo Kyeong
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Chonnam Natl Univ, Sch Healthcare & Biomed Engn, Yeosu 59626, South KoreaSungkyunkwan Univ, Sch Chem Engn, Suwon 16419, South Korea
Yoon, Bo Kyeong
Jackman, Joshua A.
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Sungkyunkwan Univ, Sch Chem Engn, Suwon 16419, South Korea
Sungkyunkwan Univ, Translat Nanobiosci Res Ctr, Suwon 16419, South KoreaSungkyunkwan Univ, Sch Chem Engn, Suwon 16419, South Korea