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普渡大学团队发现 NgAgo 基因编辑功能

已有 6682 次阅读 2019-5-11 13:16 |个人分类:生物|系统分类:海外观察

怎么看?我之前在《论对韩春雨的彻底否定》一文中写道:【NgAgo 既然已经被独立确定具备定点切割 RNA 的功能,能否在其基础上进行改造优化,使之具备对 DNA 断链的能力? 我不认为这个问题谁能用薛定谔方程证明为“不可能”。所以,不应该对韩春雨彻底 否定,而是要看到差距,而是应该继续研究。古书上断然写着青蒿能治疟疾,实际喝青蒿水有效率几乎为零,过了一千多年屠呦呦却拿了个诺贝尔奖。


翻译:普渡大学的研究小组创建了一种方法用以DNA为导引 的 NgAgo 在任意点进行基因编辑。


https://www.sciencedaily.com/releases/2019/04/190403080451.htm


The Purdue team created a method that uses the protein Argonaute from Natronobacterium gregoryi (NgAgo) and supplied DNA as a guide to enable modification anywhere on the genome, providing new options to potentially improve manufacturing, disease treatment, drug discovery and crop production.


论文网址: https://www.biorxiv.org/content/10.1101/597237v1


NgAgo is a DNA-guided DNA endonuclease Although previous studies demonstrated that refolded NgAgo does not cut DNA in vitro , consistent with our findings, we establish that soluble NgAgo can, in fact, cleave DNA in vitro. That is, refolded NgAgo may not be fully functional. As we showed that an N-del/D663A/D738A catalytic mutant lacks DNA cleaving activity (Fig. 2e), the catalytic activity is unlikely to be the result of sample contamination. However, we are unable to demonstrate unequivocal guide-dependent cleavage with both double-stranded DNA target and  single-stranded DNA target in vitro (data not shown). This may be due to inefficient guide loading, as we observe that N-del co-purifies guides (Fig. 2c). 


NgAgo can be repurposed as a DNA editing tool 


Our results provide supporting evidence to encourage the development of NgAgo for gene-editing.



https://blog.sciencenet.cn/blog-684007-1178388.html

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婵炴垶鎸搁敃銈咃耿閹绢喗顥嗛柛銉戝懏鎷遍梺闈╅檮婢瑰棝骞冮崱娑欏亱闁冲搫鍟崐鐐烘煟椤旇姤鈷掗柍瑙勫浮楠炲秹鍩€椤掑倻纾鹃柟瀵稿Х瑜版煡鏌i鍕靛剮缂併劉鍓濈粙澶屸偓锝呭缁€澶愭煛娴h櫣绡€闂佸弶绮嶇粋宥団偓锝傛櫆椤愪粙鏌ㄥ☉妯煎闁汇儱鎳樺鍨緞婵犲倻鈧崵鈧鍠掗崑鎾绘煥濞戞﹩妲规繛鎾瑰煐瀵板嫯顦崇紒顕嗗缁梻鎷嬪畷鍥╂喒闁烩剝甯幏锟�1m闂佹寧绋戦張顒傛暜閻熸噴鍦偓锝庝簻瀵版捇姊婚崶褎宸濆Δ鐘叉处缁嬪顓奸崨顖氱暔婵犮垽顤傛禍婊堝Φ閸ヮ剙违闁跨噦鎷�
http://www.cea-igp.ac.cn/kydt/278452.html
2021-8-23 17:142 濠德板€楅妴瀣濞嗘挸鐐婇柣鎰▕濡诧拷 1 濠德板€楅妴瀣閿燂拷 闁荤姍宥嗗 闁荤姍宥嗗 +1 | 闂佹悶鍎抽崑娑⑺囬敓锟�
闂佹悶鍎抽崑娑⑺囬敓锟�  闂佹寧鍐婚幏锟� 闁哄鏅滈悷銉╁吹閹寸偛绶為柍鍝勵儑缁€澶屸偓鐟板閸犳洜鑺遍埄鍐枖鐎广儱鎳愬В宀勬偣瑜嶇€氼參寮搁敓鐘虫櫖閻忕偠鍋愰崯濠囨偡濞嗘瑧鍒伴柛鈺佹湰缁嬪顓奸崨顖涚槗婵炲瓨绮i幏锟�8缂備胶瀚忛崘鈺佸瑎闂傚倸娲ゅù鍕濠靛绫嶉柣妯硅閸熷牓鏌¢崟闈涚仭婵犮垺锕㈠畷姗€宕ㄩ幍顔绢啂闂佸搫瀚烽崹鍗烆熆濮椻偓濮婄粯娼忛崜褏顦梺绋跨箺閸╂牕銆掗懜闈涚窞鐟滃海鍒掗敂鍓х煋濠电姵鑹惧▍銈呪槈閹绢垰浜鹃梺鐓庡閸忔稓绮径灞肩剨闊洤娴烽懝锟�6m闂侀潧妫撮幏锟�
Okal and Hartnady (2009)缂傚倷鐒﹂悷銉╁吹椤撱垺鍎嶉柨鐕傛嫹1929-6-27闂佸憡顨嗛〃鍡涖€侀弽銊х濞达絽澹婂▓鐐电磽閸ャ儱鈧洟鎯屽┑瀣嵍濞寸厧鐡ㄧ紓姘舵煛閸艾浜炬繝銏犵垻閸曨厽瀚х紓浣割槸椤兘宕抽悜妯尖枖闁跨噦鎷�3.9m闂佹寧绋戦張顒€鐣垫担鍓叉桨闁靛牆瀚鐑芥偣娴碱喓鍊ら崵澶愭⒒閸パ勭煑缂佹顦伴幆鏃堝籍閸モ敩銏ゅ级閳哄瀚�8缂備胶瀚忔担鎻掍壕闁稿本纰嶇粈鍫熸叏濠靛嫬鈧呮濠靛牊瀚氶柕澶嗘櫆缂傛岸鎮楃憴鍕叝閻犳劧鎷�7.8闂佸搫瀚烽崹浼村箖鎼淬劍鍋犻柛鈩冪懄閻i亶鏌曢崱顓熷
婵犵鈧啿鈧綊鎮樻径鎰嵍濞寸厧鐡ㄧ紓姘舵倶閻愨晛浜鹃梺闈╅檮婢瑰棝骞冮崱娑欏亱闁冲搫鍟崐鐐烘煟椤旇姤鈷掗柍瑙勫浮楠炲秹鍩€椤掑嫭鍎嶉柛鏇ㄥ亜閸愨偓濠电姵娲樺鑽ゅ垝閵娾晛鍑犳繝濠傜墛濞村棝鎮圭€n偄鏁剧紒杈ㄧ箞瀹曪繝鎼归锝勭帛婵犮垹鐖㈤崟顓熷缂備礁顦…鐑藉闯閻戞ḿ鈻旂€广儱鐗忓瓭闁哄鏅幏锟�1m闂佹寧绋戦惌鍌炲磻閸涱喚鈻曢柨鐕傛嫹2021-8-12闂佸搫鍟ㄩ崕鍗烇耿閹绢喗顥嗛柛銉閻熸繈骞栫€涙ɑ鐓ラ柕鍥э攻瀵板嫯顧傜紒杈ㄧ箘閳ь剝顫夐惌顔炬嫻閿燂拷7.5缂備胶瀚忛崟顐や粣闂佸搫娲﹀ḿ娆撴儍椤掍焦缍囬柛鎰╁妽閸娿倝鏌i悙鍙夘棑闁逞屽墾閹凤拷
闂佸搫瀚烽崹浼村箚娑斾讣GS闂傚倸鍊婚幊鎾诲吹椤撶喓顩查柛鈩兩戦敓銉╂煕濡够顏堝Φ閺冣偓缁傚秶鈧絺鏅滈浠嬫煕濞戣鲸绶涚紒杈╂暬楠炲繘顢橀悩宕囩崶婵炲濮伴崕杈╂閻旂厧瑙︾憸瀣焵椤掑﹥瀚�
2021-8-25 11:363 濠德板€楅妴瀣濞嗘挸鐐婇柣鎰▕濡诧拷 2 濠德板€楅妴瀣閿燂拷 闁荤姍宥嗗 闁荤姍宥嗗 +1 | 闂佹悶鍎抽崑娑⑺囬敓锟�
闂佹悶鍎抽崑娑⑺囬敓锟�  闂佹寧鍐婚幏锟� 闂佸搫绉烽~澶婄暤娴e湱鈻旈悗锝庡枟濡椼劑寮堕埡鍌滄噮闁伙附甯″顒勫炊閳哄啫濞囬梺鎸庡喕閹凤拷2021濡ょ姷鍎戦幏锟�8闂佸搫鐗為幏锟�12闂佸搫鍠涢幏锟�8.1缂備胶瀚忛崘鈺佸瑎闂傚倸娲ゅú锕€危閸涘﹦鈻旈柍褜鍓欓埢搴ㄥ焺閸愩劌绫嶉梺闈╃細閸楀啿銆掗崸妤佹櫖閻忕偠鍋愰悷婵嬫煛閸曢潧鐏犻柣鏍у閹叉挳宕熼鐔烘殸闂佸搫顑呯€氫即鍩€椤掑倸孝婵犫偓閹绢喗顥嗛柛銉╊棑缁€澶愬级閳哄倻鎳冩慨妯稿妿閳ь剛鏁婚埀顒佺〒閸熷﹪鏌嶉妷锔界厸闁逞屽墯濡線顢氶埡鍛強閹兼番鍨归悘澶愭煟閵娿儱顏€瑰憡绻堥幃鍧楀箣濠靛洤鈧倝鏌i悙鍙夘棑闁逞屽墮閸婃寧绔熺仦鍓ь洸閹兼番鍩勯崝鍐煥濞戞ḿ鐒锋い鏇熷哺濡線宕惰闊剟鏌℃担鍝勵暭鐎规挷鐒﹀鍕礋椤撶喎鈧偤鏌¢崘顓у晣缂佽鲸绻冮幆鏃堝籍閳ь剛鏁幘缁樷挃闁靛牆鎳忛煬顒€顭块懜鐢靛ⅵ闁逞屽墾閹凤拷
The 2021 South Sandwich Island Mw 8.2 Earthquake: A Slow Event Sandwiched Between Regular Ruptures
2021濡ょ姷鍋炲ḿ娆忕暦閳ユ剚娴栭柟瀛樼妇閺嬪棗鈹戦崒姘悙闁活厽璞 8.2缂備胶瀚忛崘鈺佸瑎闂傚倸娴勯幏锟�:婵犮垹澧庨幊鎾筹耿椤忓棙鏆滄慨婵嗙焾濞兼劙鏌¢崒銈呭绩妞ゃ儱娲︾粙濠勨偓锝庡枟閿涚喖鏌i妸銉ヮ伀缂佹唻绠撻獮鍫ワ綖椤撶姷娈ゆ繛瀵稿閹凤拷
Geophysical Research Letters
https://blog.sciencenet.cn/home.php?mod=space&uid=3393455&do=blog&id=1326118
2022-2-22 12:344 濠德板€楅妴瀣濞嗘挸鐐婇柣鎰▕濡诧拷 3 濠德板€楅妴瀣閿燂拷 闁荤姍宥嗗 闁荤姍宥嗗 +1 | 闂佹悶鍎抽崑娑⑺囬敓锟�

1/1 | 闂佽鍓氬Σ鎺楊敇閿燂拷:1 | 婵☆偓绲鹃悧鐘诲Υ閿燂拷 | 婵炴垶鎸搁敃锝囩博鐎涙ǜ浜滈柨鐕傛嫹 | 婵炴垶鎸搁鍕博鐎涙ǜ浜滈柨鐕傛嫹 | 闂佸搫鐗滈崑濠囧Υ閿燂拷 | 闁荤姴鎼悿鍥归敓锟�

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