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Multimeric protein assemblies are abundant in nature. Streptavidin is an attractive protein that provides a paradigm system to investigate the intra- and intermolecular interactions of multimeric protein complexes. Also, it offers a versatile tool for biotechnological applications. Here, we present two apo-streptavidin structures, the first one is an ambient temperature Serial Femtosecond X-ray crystal (Apo-SFX) structure at 1.7 Å resolution and the second one is a cryogenic crystal structure (Apo-Cryo) at 1.1 Å resolution. These structures are mostly in agreement with previous structural data. Combined with computational analysis, these structures provide invaluable information about structural dynamics of apo streptavidin. Collectively, these data further reveal a novel cooperative allostery of streptavidin which binds to substrate via water molecules that provide a polar interaction network and mimics the substrate biotin which displays one of the strongest affinities found in nature. © 2022. The Author(s).


Esra Ayan, Busra Yuksel, Ebru Destan, Fatma Betul Ertem, Gunseli Yildirim, Meryem Eren, Oleksandr M Yefanov, Anton Barty, Alexandra Tolstikova, Gihan K Ketawala, Sabine Botha, E Han Dao, Brandon Hayes, Mengning Liang, Matthew H Seaberg, Mark S Hunter, Alexander Batyuk, Valerio Mariani, Zhen Su, Frederic Poitevin, Chun Hong Yoon, Christopher Kupitz, Aina Cohen, Tzanko Doukov, Raymond G Sierra, Çağdaş Dağ, Hasan DeMirci. Cooperative allostery and structural dynamics of streptavidin at cryogenic- and ambient-temperature. Communications biology. 2022 Jan 20;5(1):73

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PMID: 35058563

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