生物物理
Online ISSN : 1347-4219
Print ISSN : 0582-4052
ISSN-L : 0582-4052
54 巻, 3 号
通巻313号
選択された号の論文の18件中1~18を表示しています
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  • 仁田 亮
    2014 年 54 巻 3 号 p. 133-139
    発行日: 2014年
    公開日: 2014/05/27
    ジャーナル フリー
    Molecular motor kinesins move processively along microtubules by using energy derived from ATP hydrolysis. Almost all of the intermediate structures of this ATPase reaction cycle have been solved for the monomeric kinesin KIF1A. Based on this structural information, we present here the common atomic mechanisms of kinesin motility, which can be applied not only to the monomeric kinesins but also to the dimeric kinesins. Structural studies have suggested that kinesins accomplish their mission by utilizing the evolutionary conserved strategy among the various ATPases/GTPases/kinases in which they use the energy from the ATP/GTP hydrolysis to attach/detach to/from their effectors.
  • 猪股 秀彦, 柴田 達夫
    2014 年 54 巻 3 号 p. 140-145
    発行日: 2014年
    公開日: 2014/05/27
    ジャーナル フリー
    The Spemann organizer secretes the anti-BMP protein Chd, and provides dorsal positional information by inactivating the ventralizing signals BMPs in a spatially graded manner. Several studies have shown that a morphogenetic field exhibits a strong tendency of self-regulation. For instance, when a blastula embryo is bisected across the D-V axis, the dorsal half develops into a well-proportioned half-size embryo, which retains a nearly normal DV ratio. These observations indicate that the BMP activity gradient is dynamically and flexibly regulated in response to changes of the embryonic size. Here we demonstrate that the auto-regulatory loop of Chd degradation plays a decisive role in scaling.
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