首页> 外文期刊>Nature >A POTENTIAL CATALYTIC SITE REVEALED BY THE 1.7-ANGSTROM CRYSTAL STRUCTURE OF THE AMINO-TERMINAL SIGNALLING DOMAIN OF SONIC HEDGEHOG
【24h】

A POTENTIAL CATALYTIC SITE REVEALED BY THE 1.7-ANGSTROM CRYSTAL STRUCTURE OF THE AMINO-TERMINAL SIGNALLING DOMAIN OF SONIC HEDGEHOG

机译:声波刺猬的氨基末端信号域的1.7角晶体结构揭示了一个潜在的催化位

获取原文
获取原文并翻译 | 示例
           

摘要

WITHIN the past few years, members of the hedgehog (hh) family of secreted signalling proteins have emerged as the primary signals generated by certain embryonic patterning centres. In vertebrate embryos, for example, sonic hedgehog expression in the notochord appears to be responsible for the local and long-range induction of ventral cell types within the neural tube and somites (reviewed in refs 1, 2). Protein products encoded by hh family members are synthesized as precursors that undergo autoprocessing to generate an amino-terminal domain that appears to be responsible for both local and long-range signalling activities, and a carboxy-terminal domain that contains the autoprocessing activity(3'4). As part of an effort to understand how hit family members participate in cell-to-cell signalling, we have determined and report here the crystal structure at 1.7 Angstrom of the amino-terminal domain of murine Sonic hedgehog (Shh-N)(5-9). The structure revealed a tetrahedrally coordinated zinc ion that appears to be structurally analogous to the zinc coordination sites of zinc hydrolases, such as thermolysin and carboxypeptidase A. This previously unsuspected catalytic site represents a distinct activity from the autoprocessing activity that resides in the carboxy-terminal domain. [References: 30]
机译:在过去的几年中,分泌信号蛋白的刺猬(hh)家族成员已经成为某些胚胎构图中心产生的主要信号。例如,在脊椎动物胚胎中,脊索中的声波刺猬表达似乎是导致神经管和体节内腹侧细胞类型的局部和远距离诱导的原因(参见参考文献1、2)。由hh家族成员编码的蛋白质产物被合成为前体,这些前体经过自动加工以生成似乎负责局部和远程信号传导活性的氨基末端结构域以及包含自加工活性的羧基末端结构域(3' 4)。为了了解受命的家庭成员如何参与细胞间信号转导,我们在这里确定并报告了鼠声波刺猬(Shh-N)(5-h)的氨基末端结构域1.7埃的晶体结构。 9)。该结构揭示了一个四面体配位的锌离子,该结构似乎与锌水解酶的锌配位点(如嗜热菌素和羧肽酶A)在结构上相似。该先前未曾想到的催化位点代表了与位于羧基末端的自加工活性截然不同的活性。域。 [参考:30]

著录项

  • 来源
    《Nature》 |1995年第6553期|p. 212-216|共5页
  • 作者单位

    JOHNS HOPKINS UNIV SCH MED DEPT BIOPHYS & BIOPHYS CHEM 725 N WOLFE ST BALTIMORE MD 21205 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

    Anomalous diffraction; Resolution;

    机译:异常衍射;分辨率;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号