H‐NS‐mediated repression of CRISPR‐based immunity in Escherichia coli K12 can be relieved by the transcription activator LeuO

ER Westra, Ü Pul, N Heidrich, MM Jore… - Molecular …, 2010 - Wiley Online Library
The recently discovered prokaryotic CRISPR/Cas defence system provides immunity against
viral infections and plasmid conjugation. It has been demonstrated that in Escherichia coli …

Identification and characterization of E. coli CRISPR‐cas promoters and their silencing by H‐NS

Ü Pul, R Wurm, Z Arslan, R Geißen… - Molecular …, 2010 - Wiley Online Library
Inheritable bacterial defence systems against phage infection and foreign DNA, termed
CRISPR (clustered regularly interspaced short palindromic repeats), consist of cas protein …

Transcription, processing and function of CRISPR cassettes in Escherichia coli

K Pougach, E Semenova, E Bogdanova… - Molecular …, 2010 - Wiley Online Library
CRISPR/Cas, bacterial and archaeal systems of interference with foreign genetic elements
such as viruses or plasmids, consist of DNA loci called CRISPR cassettes (a set of variable …

Envelope stress is a trigger of CRISPR RNA‐mediated DNA silencing in Escherichia coli

R Perez‐Rodriguez, C Haitjema, Q Huang… - Molecular …, 2011 - Wiley Online Library
A widespread feature in the genomes of most bacteria and archaea is an array of clustered,
regularly interspaced short palindromic repeats (CRISPRs) that, together with a group of …

CRP represses the CRISPR/Cas system in Escherichia coli: evidence that endogenous CRISPR spacers impede phage P1 replication

CD Yang, YH Chen, HY Huang… - Molecular …, 2014 - Wiley Online Library
The CRISPR/Cas system is an important aspect in bacterial immunology. The anti‐phage
activity of the CRISPR system has been established using synthetic CRISPR spacers, but in …

The CRISPR/Cas immune system is an operon regulated by LeuO, H-NS, and leucine-responsive regulatory protein in Salmonella enterica serovar Typhi

L Medina-Aparicio, JE Rebollar-Flores… - Journal of …, 2011 - Am Soc Microbiol
Prokaryotes have developed multiple strategies to survive phage attack and invasive DNA.
Recently, a novel genetic program denominated the CRISPR/Cas system was demonstrated …

The CRISPRs, they are a-changin': how prokaryotes generate adaptive immunity

ER Westra, DC Swarts, RHJ Staals… - Annual review of …, 2012 - annualreviews.org
All organisms need to continuously adapt to changes in their environment. Through
horizontal gene transfer, bacteria and archaea can rapidly acquire new traits that may …

Disabling a type IE CRISPR-Cas nuclease with a bacteriophage-encoded anti-CRISPR protein

A Pawluk, M Shah, M Mejdani, C Calmettes, TF Moraes… - MBio, 2017 - Am Soc Microbiol
ABSTRACT CRISPR (clustered regularly interspaced short palindromic repeat)-Cas
adaptive immune systems are prevalent defense mechanisms in bacteria and archaea. They …

[HTML][HTML] Phages fight back: inactivation of the CRISPR-Cas bacterial immune system by anti-CRISPR proteins

KL Maxwell - PLoS pathogens, 2016 - journals.plos.org
Phage infection poses a major threat to bacterial survival, and bacteria have evolved many
mechanisms to protect against it. One such system is the CRISPR-Cas system, which utilizes …

[HTML][HTML] The solution structure of an anti-CRISPR protein

KL Maxwell, B Garcia, J Bondy-Denomy, D Bona… - Nature …, 2016 - nature.com
Bacterial CRISPR–Cas adaptive immune systems use small guide RNAs to protect against
phage infection and invasion by foreign genetic elements. We previously demonstrated that …