Results 41 to 50 of about 388,782 (280)

Molecular, Enzymatic, and Cellular Characterization of Soluble Adenylyl Cyclase From Aquatic Animals. [PDF]

, 2018
The enzyme soluble adenylyl cyclase (sAC) is the most recently identified source of the messenger molecule cyclic adenosine monophosphate. sAC is evolutionarily conserved from cyanobacteria to human, is directly stimulated by [Formula: see text] ions ...
Acin-Perez, Barott, Barott, Barott, Beltrán, Berthelot, Bitterman, Bordeaux, Braun, Braun, Braun, Buck, Camacho Londoño, Chaloupka, Chen, Chen, Cooper, De Rasmo, Di Benedetto, Elliott, Farrell, Geng, Goldberg, Gordeladze, Hess, Hrdlickova, Jaiswal, Kobayashi, Leparc, Levin, Litvin, Magro, Neer, Neer, Nomura, Nomura, Ramos-Espiritu, Roa, Roa, Roa, Salem, Salomon, Schwencke, Steegborn, Steegborn, Stessin, Structural Genomics Consortium, Tresguerres, Tresguerres, Tresguerres, Tresguerres, Tresguerres, Wilson, Yeo, Zaccolo, Zippin, Zippin, Zippin, Zippin   +58 more
core   +2 more sources

Catalytic RNA world relics in Dicer RNAs [PDF]

International Journal of Genetics, 2009
RNA interference (RNAi) is a naturally occurring phenomenon of RNA-mediated gene silencing that is highly conserved among multicellular organisms. In the first step of the pathway, long double- stranded RNA molecules are chopped into shorter duplexes with 2 nucleotide overhangs at both 3 ' ends by an endonuclease dubbed Dicer, the structure of which ...
Priyanka Dhar, Sayak Ganguli, Protip Basu, Abhijit Datta, Paushali Roy, Sanjay Kumar Dey   +5 more
openaire   +2 more sources

Computed Energetics of Nucleotides in Spatial Ribozyme Structures: An Accurate Identification of Functional Regions from Structure

The Scientific World Journal, 2004
Ribozymes are functionally diverse RNA molecules with intrinsic catalytic activity. Multiple structural and biochemical studies are required to establish which nucleotide bases are involved in the catalysis.
Ivan Y. Torshin
doaj   +1 more source

Use of RNA secondary structure for evolutionary relationships : investigating RNase P and RNase MRP : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Genetics at Massey University, New Zealand [PDF]

, 1998
Bioinformatics is applied here to examine whether RNA secondary structure data can reflect distant evolutionary relationships. This is important when there is little confidence in sequence data such as when looking at the evolution of RNase MRP (MRP ...
Collins, Lesley Joan
core  

Force for ancient and recent life: viral and stem-loop RNA consortia promote life. [PDF]

, 2014
Lytic viruses were thought to kill the most numerous host (i.e., kill the winner). But persisting viruses/defectives can also protect against viruses, especially in a ubiquitous virosphere. In 1991, Yarmolinsky et al.
Villarreal, Luis P
core   +1 more source

RNA-catalyzed evolution of catalytic RNA

Proceedings of the National Academy of Sciences
An RNA polymerase ribozyme that was obtained by directed evolution can propagate a functional RNA through repeated rounds of replication and selection, thereby enabling Darwinian evolution. Earlier versions of the polymerase did not have sufficient copying fidelity to propagate functional information, but a new variant with improved fidelity can ...
Nikolaos Papastavrou, David P. Horning, Gerald F. Joyce   +2 more
openaire   +2 more sources

A stepwise emergence of evolution in the RNA world

FEBS Letters, EarlyView.
How did biological evolution emerge from chemical reactions? This perspective proposes a gradual scenario of self‐organization among RNA molecules, where catalytic feedback on random mixtures plays the central role. Short oligomers cross‐ligate, and self‐assembly enables heritable variations. An event of template‐externalization marks the transition to
Philippe Nghe
wiley   +1 more source

What RNA World? Why a Peptide/RNA Partnership Merits Renewed Experimental Attention

Life, 2015
We review arguments that biology emerged from a reciprocal partnership in which small ancestral oligopeptides and oligonucleotides initially both contributed rudimentary information coding and catalytic rate accelerations, and that the superior ...
Charles W. Carter
doaj   +1 more source

Cross-Catalytic Replication of an RNA Ligase Ribozyme [PDF]

Chemistry & Biology, 2004
A self-replicating RNA ligase ribozyme was converted to a cross-catalytic format whereby two ribozymes direct each other's synthesis from a total of four component substrates. Each ribozyme binds two RNA substrates and catalyzes their ligation to form the opposing ribozyme.
Gerald F. Joyce, Dong-Eun Kim
openaire   +3 more sources

Evolutionary interplay between viruses and R‐loops

FEBS Letters, EarlyView.
Viruses interact with specialized nucleic acid structures called R‐loops to influence host transcription, epigenetic states, latency, and immune evasion. This Perspective examines the roles of R‐loops in viral replication, integration, and silencing, and how viruses co‐opt or avoid these structures.
Zsolt Karányi, Zita Képes, Zoltán Szabó, Eszter Csoma, Lóránt Székvölgyi   +4 more
wiley   +1 more source