منابع مشابه
RNA-Dependent Cysteine Biosynthesis in Bacteria and Archaea
The diversity of the genetic code systems used by microbes on earth is yet to be elucidated. It is known that certain methanogenic archaea employ an alternative system for cysteine (Cys) biosynthesis and encoding; tRNACys is first acylated with phosphoserine (Sep) by O-phosphoseryl-tRNA synthetase (SepRS) and then converted to Cys-tRNACys by Sep-tRNA:Cys-tRNA synthase (SepCysS). In this study, ...
متن کاملThe Non-Coding Regulatory RNA Revolution in Archaea
Small non-coding RNAs (sRNAs) are ubiquitously found in the three domains of life playing large-scale roles in gene regulation, transposable element silencing and defense against foreign elements. While a substantial body of experimental work has been done to uncover function of sRNAs in Bacteria and Eukarya, the functional roles of sRNAs in Archaea are still poorly understood. Recently, high t...
متن کاملCRISPR Systems: RNA-Guided Defence Mechanisms in Bacteria and Archaea
Viruses are responsible for 4 to 50% destruction of bacterial and archaeal communities (Breitbart and Rohwer, 2005; Rohwer and Thurber, 2009) and the selective pressures imposed by these rapidly evolving viruses (parasites) has driven the diversification of microbial defence systems. Previously our understanding of antiviral immune systems in bacteria has focused on encounter blocks, adsorption...
متن کاملComparative analysis of ribonuclease P RNA structure in Archaea.
Although the structure of the catalytic RNA component of ribonuclease P has been well characterized in Bacteria, it has been little studied in other organisms, such as the Archaea. We have determined the sequences encoding RNase P RNA in eight euryarchaeal species: Halococcus morrhuae, Natronobacterium gregoryi, Halobacterium cutirubrum, Halobacteriurn trapanicum, Methanobacterium thermoautotro...
متن کاملRNA interference and Register Machines (extended abstract)
RNA interference (RNAi) is a mechanism whereby small RNAs (siRNAs) directly control gene expression without assistance from proteins. This mechanism consists of interactions between RNAs and small RNAs both of which may be single or double stranded. The target of the mechanism is mRNA to be degraded or aberrated, while the initiator is double stranded RNA (dsRNA) to be cleaved into siRNAs. Obse...
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ژورنال
عنوان ژورنال: Molecular Microbiology
سال: 2003
ISSN: 0950-382X,1365-2958
DOI: 10.1046/j.1365-2958.2003.03483.x