SPECIFIC PROTEIN DNA COMPLEXES TO STUDY CHEMICAL MECHANISM IN CELLULAR REG

在过去的一年里，我们实验室进行了国际象棋A1、F1的测试 和F2、NSLS X4A、X12和X25以及APS来延长分辨率 提高了晶体络合物的衍射数据质量 参与伴侣蛋白介导的蛋白质折叠，信号转导， 转录和翻译调控。在那些旅行中，我们 已经获得了大量完整的高分辨率数据集，从而 直接用于确定以下新结构：(1) 孕酮配体结合区与孕酮复合；(2) 人雌激素受体配体结合域与 雌二醇；(3)伴侣蛋白GroEL/GroES/ADP复合体； 嗜热菌Ef-Tu/Ef-Ts络合物；和(5)P.woesei三元络合物 TATA结合蛋白TFIIB和包含一个 共识塔塔排行榜2.1(见出版物部分)。最近的数据 在国际象棋上收集的资料对解决上述问题起到了重要作用 结构。此外，还发表了一篇关于这种疾病的分子机制的论文 磷酸化在异三聚体调节中的作用 通过光导蛋白制备的G蛋白也在从以下地址收集的数据中进行准备： 关于磷酸化形式的硫代蛋白的国际象棋。其他项目，包括 仍在进行中，已经受到了 国际象棋同步加速器数据收集包括以下内容： 伴侣蛋白-药物蛋白折叠：了解细胞外基质的能力 ATP驱动GroEL-Groes反应循环，我们希望研究相关 ATPase循环中的中间体。GroEL/Groes/(ADP)7/(AlFx)7 晶体衍射率为4在我们的家乡，但只有初步的测试是 今年在国际象棋F1线上完成的。寻找最佳冷冻方法 情况正在进行中。牛视觉芳香素：芳香素 晶体衍射率为3.0使用同步辐射(NSLS)的分辨率 X-25光束线和MacCHESS A-1光束线)。我们已经收集了完整的 原生数据集至3.1(C2221；a=169)，b=c=191；晶体大小： 0.2 x 0.2 x 0.03 mm3)。有用的MAD、重原子和反常数据集 已在国际象棋、X-25和APS收集了分阶段使用的数据。第四纪 VP16酸性活化结构域与hTBPc、hTFIIB的络合物 在Promoter DNA上。到目前为止没有高分辨率的构造信息 存在于转录激活因子结构域上，与 预引发复合体。因此，这种晶体结构将揭示 在强酸性激活结构域和 基础机制，导致转录激活。这个 晶体衍射率约为4.0在主源上(100K)。几个 2.6原生数据集(第21页；a=118.7，b=122.2，c=140.8，b= 113.0；晶体尺寸：0.4x0.1x0.05mm3)是最近采集的 在国际象棋F2和F1线上。

Our laboratory has in the past year conducted runs at CHESS A1, F1 and F2, NSLS X4A, X12 and X25, as well as APS to extend the resolution and improve the quality of diffraction data for crystalline complexes involved in chaperonin mediated protein folding, signal transduction, transcriptional and translational regulation. During those trips we have obtained numerous complete high resolution data sets resulting directly in the determination of the following new structures: (1) progesterone ligand binding domain complexed with progesterone; (2) human estrogen receptor ligand binding domain complexed with estradiol; (3) the chaperonin GroEL/GroES/ADP complex; (4) the T. thermophilus EF-Tu/EF-Ts complex; and (5) a P. woesei ternary complex of the TATA-binding protein, TFIIB, and a DNA sequence containing a consensus TATA box at 2.1
(see publications section). Data recently collected at CHESS has been instrumental in solving all of the above structures. In addition a paper on the molecular mechanism for the role of phosphorylation in the regulation of hetereotrimeric G-Proteins by phosducin is also in preparation from data collected at CHESS on the phosphorylated form of phosducin. Other projects which are still in progress which have been significantly influenced by CHESS synchrotron data collection include the following: Chaperonin-Medicated Protein Folding: To understand the capacity of ATP to drive the GroEL-GroES reaction cycle, we wish to study relevant intermediates in the ATPase cycle. GroEL/GroES/(ADP)7/(AlFx)7 crystals diffract to 4
at our home source but only initial tests were done at the CHESS F1 line this year. Searching for optimal freezing conditions is in progress. Bovine Visual Arrestin: The arrestin crystals diffract to 3.0
resolution using synchrotron radiation (NSLS X-25 beamline and MacCHESS A-1 beamline). We have collected complete native data sets to 3.1
(C2221; a = 169
, b = c = 191
; crystal size: 0.2 x 0.2 x 0.03 mm3). Useful MAD, heavy atom and anomalous data sets for phasing have been collected at CHESS, X-25 and APS. Quaternary Complex of VP16 Acidic Activation Domain Complexed with hTBPc, hTFIIB on Promoter DNA. To date no high resolution structural information exists on a transcriptional activator domain bound to the preinitiation complex. Hence, this crystal structure will reveal the essential contacts made between a strong acidic activation domain and the basal machinery, resulting in transcriptional activation. The crystals diffract to about 4.0
on a home source (at 100 K). Several 2.6
native data sets (P21; a = 118.7
, b = 122.2
, c = 140.8
, b = 113.0 ; crystal size: 0.4 x 0.1 x 0.05 mm3) were collected recently at CHESS F2 and F1 lines.