Baidu
map

NAT STRUCT MOL BIOL:酶的冻结作用使科学家提出新的癌症治疗观点!

2017-07-04 佚名 medicalxpress

经过数百万年的发展,细胞已经开发出无数的方法来调节使它们蓬勃发展的过程。特别有用的工具已经被保存下来,或者是“保存”,所以今天我们可以从广泛的生命形式中找到它们,从原始到最复杂。 冷泉港实验室(CSHL)结构生物学家于2017年7月3日发表的研究揭示了一种这样的保守机制的运作,对新型癌症药物的发展具有重要意义。

经过数百万年的发展,细胞已经开发出无数的方法来调节使它们蓬勃发展的过程。特别有用的工具已经被保存下来,或者是“保存”,所以今天我们可以从广泛的生命形式中找到它们,从原始到最复杂。

冷泉港实验室(CSHL)结构生物学家于2017年7月3日发表的研究揭示了一种这样的保守机制的运作,对新型癌症药物的发展具有重要意义。

由CSHL教授和霍华德·休斯医学研究所研究员Leemor Joshua-Tor领导,该团队使用X射线晶体学技术捕获了称为TUTases的一类酶的冻结。以单个原子的分辨率显示它们与其他分子相互作用以调节称为let-7的重要小RNA分子的活性。

Let-7,一种microRNA,是发育重要基因的调节因子。当在人类中表达时,它是我们的干细胞分化成填充我们器官的各种特殊细胞类型的过程的一部分。在干细胞维持其“干性” - 其无限期向更多干细胞产生的能力的情况下,let-7需要停用。

Let-7是特别令人感兴趣的,因为其在癌细胞中的失活被一些人认为赋予这些细胞能够无限期地增殖的干细胞样特性。这一点集中注意了解调节let-7是活动还是非活动的机制。

该团队的图片显示TUT4和TUT7 - 两种TUTase酶在两种情况下的行为方式不同。在一个分化细胞中,TUTase修正了许多let-7前体序列中的一个小的遗传诱导缺陷,使得能够产生成熟的let-7微小RNA。当TUTase在let-7前体的序列中添加单个尿苷(“u”)分子时,可以改善这些缺陷。

在注射保留其干细胞时,其中一个TUTase对let-7前体不是添加一个而是添加30个尿苷,以这种方式将其标记为被另一种酶破坏。约书亚·托姆说:“我们已经能够以这两种不同的行动方式捕获TUTases。

Joshua-Tor解释说,TUTases是新癌症治疗的有希望的靶标。例如在let-7水平远低于正常值的肾癌和肺癌细胞中,可能会抑制涉及标记let-7以破坏的TUTase。有极高分辨率的图像,他们如何在分子舞蹈中行动,应该有助于这一努力。

原始出处:
Christopher R Faehnle,Jack Walleshauser& Leemor Joshua-Tor.Multi-domain utilization by TUT4 and TUT7 in control of let-7 biogenesis, Nature Structural and Molecular Biology (2017). 

版权声明:
本网站所有内容来源注明为“梅斯医学”或“MedSci原创”的文字、图片和音视频资料,版权均属于梅斯医学所有。非经授权,任何媒体、网站或个人不得转载,授权转载时须注明来源为“梅斯医学”。其它来源的文章系转载文章,或“梅斯号”自媒体发布的文章,仅系出于传递更多信息之目的,本站仅负责审核内容合规,其内容不代表本站立场,本站不负责内容的准确性和版权。如果存在侵权、或不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
在此留言
评论区 (5)
#插入话题
  1. [GetPortalCommentsPageByObjectIdResponse(id=1795130, encodeId=1e541e95130a3, content=<a href='/topic/show?id=1c9f16846fe' target=_blank style='color:#2F92EE;'>#Struc#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16846, encryptionId=1c9f16846fe, topicName=Struc)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4a4d285, createdName=日月, createdTime=Sun Sep 24 13:45:00 CST 2017, time=2017-09-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1882255, encodeId=c16b1882255e2, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Wed Nov 22 20:45:00 CST 2017, time=2017-11-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1767170, encodeId=96181e6717031, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=104, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3437, encryptionId=64f5343e2f, topicName=Biol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=446937890434, createdName=12498ebem31暂无昵称, createdTime=Tue Jul 25 12:45:00 CST 2017, time=2017-07-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1917557, encodeId=843b191e55706, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Wed Jan 24 22:45:00 CST 2018, time=2018-01-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1844220, encodeId=efc91844220c3, content=<a href='/topic/show?id=06a2e1405a8' target=_blank style='color:#2F92EE;'>#癌症治疗#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71405, encryptionId=06a2e1405a8, topicName=癌症治疗)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=cbf451, createdName=陈吴1234, createdTime=Sat Mar 24 00:45:00 CST 2018, time=2018-03-24, status=1, ipAttribution=)]
    2017-09-24 日月
  2. [GetPortalCommentsPageByObjectIdResponse(id=1795130, encodeId=1e541e95130a3, content=<a href='/topic/show?id=1c9f16846fe' target=_blank style='color:#2F92EE;'>#Struc#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16846, encryptionId=1c9f16846fe, topicName=Struc)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4a4d285, createdName=日月, createdTime=Sun Sep 24 13:45:00 CST 2017, time=2017-09-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1882255, encodeId=c16b1882255e2, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Wed Nov 22 20:45:00 CST 2017, time=2017-11-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1767170, encodeId=96181e6717031, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=104, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3437, encryptionId=64f5343e2f, topicName=Biol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=446937890434, createdName=12498ebem31暂无昵称, createdTime=Tue Jul 25 12:45:00 CST 2017, time=2017-07-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1917557, encodeId=843b191e55706, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Wed Jan 24 22:45:00 CST 2018, time=2018-01-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1844220, encodeId=efc91844220c3, content=<a href='/topic/show?id=06a2e1405a8' target=_blank style='color:#2F92EE;'>#癌症治疗#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71405, encryptionId=06a2e1405a8, topicName=癌症治疗)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=cbf451, createdName=陈吴1234, createdTime=Sat Mar 24 00:45:00 CST 2018, time=2018-03-24, status=1, ipAttribution=)]
    2017-11-22 liye789132251
  3. [GetPortalCommentsPageByObjectIdResponse(id=1795130, encodeId=1e541e95130a3, content=<a href='/topic/show?id=1c9f16846fe' target=_blank style='color:#2F92EE;'>#Struc#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16846, encryptionId=1c9f16846fe, topicName=Struc)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4a4d285, createdName=日月, createdTime=Sun Sep 24 13:45:00 CST 2017, time=2017-09-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1882255, encodeId=c16b1882255e2, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Wed Nov 22 20:45:00 CST 2017, time=2017-11-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1767170, encodeId=96181e6717031, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=104, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3437, encryptionId=64f5343e2f, topicName=Biol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=446937890434, createdName=12498ebem31暂无昵称, createdTime=Tue Jul 25 12:45:00 CST 2017, time=2017-07-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1917557, encodeId=843b191e55706, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Wed Jan 24 22:45:00 CST 2018, time=2018-01-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1844220, encodeId=efc91844220c3, content=<a href='/topic/show?id=06a2e1405a8' target=_blank style='color:#2F92EE;'>#癌症治疗#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71405, encryptionId=06a2e1405a8, topicName=癌症治疗)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=cbf451, createdName=陈吴1234, createdTime=Sat Mar 24 00:45:00 CST 2018, time=2018-03-24, status=1, ipAttribution=)]
  4. [GetPortalCommentsPageByObjectIdResponse(id=1795130, encodeId=1e541e95130a3, content=<a href='/topic/show?id=1c9f16846fe' target=_blank style='color:#2F92EE;'>#Struc#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16846, encryptionId=1c9f16846fe, topicName=Struc)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4a4d285, createdName=日月, createdTime=Sun Sep 24 13:45:00 CST 2017, time=2017-09-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1882255, encodeId=c16b1882255e2, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Wed Nov 22 20:45:00 CST 2017, time=2017-11-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1767170, encodeId=96181e6717031, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=104, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3437, encryptionId=64f5343e2f, topicName=Biol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=446937890434, createdName=12498ebem31暂无昵称, createdTime=Tue Jul 25 12:45:00 CST 2017, time=2017-07-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1917557, encodeId=843b191e55706, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Wed Jan 24 22:45:00 CST 2018, time=2018-01-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1844220, encodeId=efc91844220c3, content=<a href='/topic/show?id=06a2e1405a8' target=_blank style='color:#2F92EE;'>#癌症治疗#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71405, encryptionId=06a2e1405a8, topicName=癌症治疗)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=cbf451, createdName=陈吴1234, createdTime=Sat Mar 24 00:45:00 CST 2018, time=2018-03-24, status=1, ipAttribution=)]
    2018-01-24 sunylz
  5. [GetPortalCommentsPageByObjectIdResponse(id=1795130, encodeId=1e541e95130a3, content=<a href='/topic/show?id=1c9f16846fe' target=_blank style='color:#2F92EE;'>#Struc#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16846, encryptionId=1c9f16846fe, topicName=Struc)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4a4d285, createdName=日月, createdTime=Sun Sep 24 13:45:00 CST 2017, time=2017-09-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1882255, encodeId=c16b1882255e2, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Wed Nov 22 20:45:00 CST 2017, time=2017-11-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1767170, encodeId=96181e6717031, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=104, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3437, encryptionId=64f5343e2f, topicName=Biol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=446937890434, createdName=12498ebem31暂无昵称, createdTime=Tue Jul 25 12:45:00 CST 2017, time=2017-07-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1917557, encodeId=843b191e55706, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Wed Jan 24 22:45:00 CST 2018, time=2018-01-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1844220, encodeId=efc91844220c3, content=<a href='/topic/show?id=06a2e1405a8' target=_blank style='color:#2F92EE;'>#癌症治疗#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71405, encryptionId=06a2e1405a8, topicName=癌症治疗)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=cbf451, createdName=陈吴1234, createdTime=Sat Mar 24 00:45:00 CST 2018, time=2018-03-24, status=1, ipAttribution=)]

相关资讯

CLIN CHEM:血清中9种酶的生物变异

研究人员发现国籍对观察到的变化没有影响,但总体性别相关的差异对于丙氨酸氨基转移酶(ALT),γ-谷氨酰转移酶(GGT)和肌酸激酶(CK)是明显的。最终得到以下对受试者BV(CV I)和受试者间BV(CV G)的估计值:ALT:9.3%,28.2%; 天冬氨酸氨基转移酶:9.5%,20.3%; GGT:8.9%,41.7%; 碱性磷酸酶:5.3%,24.9%; 乳酸脱氢酶:5.2%,12.6%; C

Nature子刊:超小型Cas9酶助力精准基因编辑

ToolGen是一家专门从事基因编辑技术研发的韩国生物技术公司,近日公布了空肠弧菌Cas9 (CjCas9)——这一迄今为止最小的Cas9酶同源物——用于在体内基因编辑及其治疗潜力的激动人心的研究成果,发表于《自然》子刊《Nature Communications》上。该研究显示,将CjCas9的基因和sgRNA序列包装到单个腺相关病毒(AAV)载体中,可用于体内的基因编辑操作。另一方面,在体外实

Cell:DNA修复必不可少的酶

最近,澳大利亚国立大学(ANU)和德国海德堡大学的科学家们,发现了DNA修复过程中的一个重要组成部分,将为开发新的抗癌药物打开大门。相关研究结果发表在10月27日的《Cell》杂志。  本研究资深作者、ANU副教授Tamás Fischer说,这项研究发现,由DNA和RNA组成的混合结构,对于DNA损伤后的遗传信息修复发挥着重要的作用。RNA是储存在DNA中的遗传信息的短暂副本。 &nb

Cell:科学家发现DNA修复的关键酶

图片来源:www.phys.org 日前,一项刊登在国际杂志Cell上的研究报告中,来自澳大利亚国立大学和德国海德堡大学的研究人员通过研究发现了一种DNA修复过程中的必要组分,该研究或为后期开发新型抗癌药物提供一定的思路。 研究者Tamas Fischer教授指出,当DNA被损伤后,由DNA和RNA组成的混合结构在修复遗传信息上扮演着重要角色,RNAs是一种储存在DNA中短暂的遗传信息副本

为什么酒鬼自制力差?他们可能缺少一种关键的酶

导语:近日,来自瑞典林雪平大学的研究小组发表了一项研究,他们发现当出现酒精依赖时,大脑额叶神经元内的一种名为PRDM2的酶的水平会降低。这种酶的缺陷将导致不顾后果的持续饮酒。近日,来自瑞典林雪平大学的研究小组发表了一项研究,他们发现当出现酒精依赖时,大脑额叶神经元内的一种酶的水平会降低。这种酶的缺陷将导致不顾后果的持续饮酒。这项研究发表在Nature出版集团排名第一的精神病学杂志Molecular

Nature子刊:CRISPR让致命疾病“弃恶从善”

导语:现在,美国贝勒医学院的研究人员在小鼠身上进行的研究显示,通过删除一个疾病相关的基因,他们可以把曾经致命的疾病,转变成一种良性的形式。相关研究结果发表在8月30日的《Nature Communications》杂志。肝脏疾病酪氨酸血症I型,是一种严重的疾病,医生通常使用药物治疗。然而,这种治疗是终身的,并且仍然存在肝癌的残留风险,通常是通过原位肝移植治疗。现在,美国贝勒医学院的研究人员在小鼠身

Baidu
map
Baidu
map
Baidu
map