Results 171 to 180 of about 6,739,220 (297)

Composition of text repetition and parallelism on the base of A.P. Chekhov's stories

RUDN Journal of Language Studies, Semiotics and Semantics, 2011
In the article on the base of materials from A.P. Chekhov's stories parallelisms and repetitions encountered at different levels of organization of speech in the text, I considered.
N V Nikashina
doaj  

Structural and biochemical analysis of a B12 superbinder

FEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices, Jacob J. Whittaker, Dirk J. Slotboom, Albert Guskov   +3 more
wiley   +1 more source

The unique epigenetic features of Pack-MULEs and their impact on chromosomal base composition and expression spectrum. [PDF]

Nucleic Acids Res, 2018
Zhao D, Hamilton JP, Vaillancourt B, Zhang W, Eizenga GC, Cui Y, Jiang J, Buell CR, Jiang N.   +8 more
europepmc   +2 more sources

Purifying selection against spurious splicing signals contributes to the base composition evolution of the polypyrimidine tract

, 2022
Yıldırım B, Vogl C.
europepmc   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

FEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav, Bogdan I. Florea, Sebastian Geibel   +2 more
wiley   +1 more source

Base composition at the start of the coding sequence controls the balance between translation initiation and mRNA degradation in E. coli. [PDF]

Nucleic Acids Res
Lipońska A, Monlezun L, Wilkins I, Ngo S, Oïffer T, Bouchachi C, Hunt JF, Aalberts DP, Boël G.   +8 more
europepmc   +1 more source

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

FEBS Letters, EarlyView.
How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley   +1 more source

Impact of Recombination on the Base Composition of Bacteria and Archaea. [PDF]

Mol Biol Evol, 2017
Bobay LM, Ochman H.
europepmc   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

FEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge, Vivian Pogenberg, Alexander Baumgart, Bente Siebels, Hartmut Schlüter, Michael Hecht‐Bucher, Aymelt Itzen   +6 more
wiley   +1 more source

Base composition and adaptation of duck and goose circovirus for original and cross-host strains via codon-based investigation. [PDF]

Poult Sci
Jiao R, Xu X, Ji J, Li D, Yao L, Liu F, Wang L, Bi Y, Xie Q.   +8 more
europepmc   +1 more source