相关实验视频

Updated: May 16, 2025

Substrate Generation for Endonucleases of CRISPR/Cas Systems

Substrate Generation for Endonucleases of CRISPR/Cas Systems

Published on: September 8, 2012

针对12种新型CRISPR系统的初步表征,包括5型CRISPR系统的新型子类型和变种

Jesse Tordoff¹, Lauren E Alfonse¹, Kira S Makarova²

¹Arbor Biotechnologies, Cambridge, Massachusetts, USA.

The CRISPR journal

|March 31, 2025

概括

研究人员在5型CRISPR系统中发现了新的Cas12变体,扩大了基因组工程的工具包. 一些变异在没有DNA裂变的情况下起作用,在生物技术中提供了新的应用.

科学领域:

分子生物学分子生物学
基因组学就是基因组学.
生物技术是生物技术.

背景情况:

第五型CRISPR系统在序列,机制和功能方面表现出显著的多样性.
之前的研究已经提升了对它们进化的理解,但许多类型仍然没有特征.

研究的目的:

在V型CRISPR系统中识别和实验性地表征新的Cas12变体.
扩大已知的Cas12效应器的多样性,并探索它们对基因组工程的潜力.

主要方法:

挖掘元基因组数据库以识别新的Cas12亚型和变种.
试验性和计算性对原体空间器相邻动机 (PAM) 识别,干扰活动,位置结构和tracrRNA依赖性的表征.
在菌体和菌体中发现的Cas12变体的分析.

主要成果:

发现了三种新的Cas12亚型 (Cas12o,Cas12p) 和九种新的变种.
对PAM特异性,干扰活性和新变异的tracrRNA依赖性的表征.
发现Cas12o和Cas12p缺乏催化残留物,这表明非裂变干扰机制.
识别Cas12f10在没有PAM的目标上表现出活动.
观察到一半新发现的Cas12s与菌体或菌体有关.

结论:

这项研究显著扩大了功能特征的Cas12效应器的范围.
新的Cas12亚型和变体为基因组操纵提供了新的机制.
已经确定了先进基因组工程工具的有希望的候选人.

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Gene Digital Circuits Based on CRISPR-Cas Systems and Anti-CRISPR Proteins

Gene Digital Circuits Based on CRISPR-Cas Systems and Anti-CRISPR Proteins

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Rapid and Specific Detection of Acinetobacter baumannii Infections Using a Recombinase Polymerase Amplification/Cas12a-based System

Rapid and Specific Detection of Acinetobacter baumannii Infections Using a Recombinase Polymerase Amplification/Cas12a-based System

Published on: April 25, 2025

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