The interaction of DNA with bacteriophage phi 29 connector: a study by AFM and TEM.

The interaction of DNA with bacteriophage phi 29 connector: a study by AFM and TEM.
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DNA 与噬菌体 phi 29 连接器的相互作用:AFM 和 TEM 的研究。

DOI:
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发表时间:
1996
影响因子:
3
通讯作者:
R. García
R. García
中科院分区:
生物学3区
文献类型:
--
作者:
M. Valle;J. Valpuesta;J. Carrascosa;J. Tamayo;R. García

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噬菌体phi 29的接头在病毒形态发生过程中参与DNA包装,我们已经研究了它在体外使用线性或环状DNA与DNA的结合。用透射电镜(TEM)和原子力显微镜(AFM)对直接沉积在云母上的样品进行了蛋白质- dna复合物的分析。透射电镜显示,由于蛋白质与DNA的自由端相互作用,存在特定的结合。通过AFM对这些样品的研究显示了两种主要的形态类型:连接器与圆形DNA的相互作用表明,进入和退出蛋白质复合体的DNA链形成一个平均值为132度的角度。然而,当连接器与线性DNA孵育(后来循环),有一个额外的弯曲角度约168度。通过AFM对后一种样品进行进一步的形态分析,发现蛋白质-DNA复合物的结构与DNA穿过连接器的结构一致,可能是通过内部通道。另一方面,用圆形DNa孵育连接器获得的样品图像与DNa与连接器外部的相互作用一致。
The connector of bacteriophage phi 29 is involved in DNA packaging during viral morphogenesis and we have studied its in vitro binding to DNA using either linear or circular DNA. The protein-DNA complexes have been analyzed by transmission electron microscopy (TEM) and by atomic force microscopy (AFM) of samples directly deposited on mica. TEM showed the presence of a specific binding due to the interaction of the protein with the free ends of the DNA. The study of these samples by AFM showed two major types of morphologies: The interaction of the connector with circular DNA revealed that the strands of DNA that enter and exit the protein complex form an angle with a mean value of 132 degrees. Nevertheless, when the connector was incubated with linear DNA (and later circularized), there was an additional bend angle of about 168 degrees. Further morphological analysis of the latter samples by AFM revealed a structure of the protein-DNA complex consistent with the DNA traversing the connector, probably through the inner channel. On the other hand, images from the samples obtained by incubation of the connector with circular DNa were consistent with an interaction of the DNA with the outer side of the connector.
DOI: 10.1126/science.8503010
发表时间: 1993-06-11
期刊: SCIENCE
影响因子: 56.9
作者:
REES, WA;KELLER, RW;BUSTAMANTE, C
通讯作者: BUSTAMANTE, C
噬菌体 phi 29 连接器蛋白与病毒 DNA 的相互作用。
DOI: 10.1016/0042-6822(86)90191-1
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影响因子: 3.7
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噬菌体 phi 29 连接器的构象变化会阻止 DNA 结合活性。
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发表时间: 1990
影响因子: 5.6
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从 dsDNA 噬菌体中分离和表征门蛋白-DNA 复合物。
DOI: 10.1159/000150225
发表时间: 1992
期刊: Intervirology
影响因子: 4.6
作者:
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通讯作者: Black,LW
DOI: 10.1016/0022-2836(92)90469-z
发表时间: 1992-04-20
影响因子: 5.6
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通讯作者: SERWER, P