Results 71 to 80 of about 488,813 (304)

A result on best proximity pair of two sets

Journal of Approximation Theory, 1988
Let F and G be nonvoid subsets of the normed space X. The pair \((f_ 0,g_ 0)\in F\times G\) is called a best proximity pair of F and G if: \(\| f_ 0-g_ 0\| =\inf \{\| f-g\|:\quad f\in F,\quad g\in G\}.\) The author's main result is: If F is sequentially compact, G is convex and every \(f\in F\) has a best approximation element in G then a best ...
openaire   +2 more sources

Recurrent oligomers in proteins - an optimal scheme reconciling accurate and concise backbone representations in automated folding and design studies

, 2000
A novel scheme is introduced to capture the spatial correlations of consecutive amino acids in naturally occurring proteins. This knowledge-based strategy is able to carry out optimally automated subdivisions of protein fragments into classes of ...
Maritan, Amos, Micheletti, Cristian, Seno, Flavio   +2 more
core   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

Rad27/FEN1 prevents accumulation of Okazaki fragments and ribosomal DNA copy number changes

FEBS Letters, EarlyView.
The budding yeast Rad27 is a structure‐specific endonuclease. Here, the authors reveal that Rad27 is crucial for maintaining the stability of the ribosomal RNA gene (rDNA) region. Rad27 deficiency leads to the accumulation of Okazaki fragments and changes in rDNA copy number.
Tsugumi Yamaji, Yuko Katayama, Nanase Arata, Mariko Sasaki   +3 more
wiley   +1 more source

The role of fibroblast growth factors in cell and cancer metabolism

FEBS Letters, EarlyView.
Fibroblast growth factor (FGF) signaling regulates crucial signaling cascades that promote cell proliferation, survival, and metabolism. Therefore, FGFs and their receptors are often dysregulated in human diseases, including cancer, to sustain proliferation and rewire metabolism.
Jessica Price, Chiara Francavilla
wiley   +1 more source

Noncyclic contractions and relatively nonexpansive mappings in strictly convex fuzzy metric spaces

AIMS Mathematics, 2022
A concept of fuzzy projection operator is introduced and use to investigate the non-emptiness of the fuzzy proximal pairs. We then consider the classes of noncyclic contractions and noncyclic relatively nonexpansive mappings and survey the existence of ...
Moosa Gabeleh , Elif Uyanık Ekici , Manuel De La Sen   +2 more
doaj   +1 more source

Energy-Efficient Resource Allocation for Device-to-Device Underlay Communication

, 2014
Device-to-device (D2D) communication underlaying cellular networks is expected to bring significant benefits for utilizing resources, improving user throughput and extending battery life of user equipments.
Han, Zhu, Song, Lingyang, Wang, Feiran, Xu, Chen   +3 more
core   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

CTCF-mediated transcriptional regulation through cell type-specific chromosome organization in the {\beta}-globin locus [PDF]

, 2012
The principles underlying the architectural landscape of chromatin beyond the nucleosome level in living cells remains largely unknown despite its potential to play a role in mammalian gene regulation. We investigated the 3-dimensional folding of a 1 Mbp
Ann Dean, Bau, Bau, Bender, Bender, Botta, Chunhui Hou, Cook, Cui, de Gennes, Dekker, Dorier, Dostie, Drissen, Duan, Farrell, François Képès, Fraser, Hadjur, Handoko, Hou, Hou, Ivan Junier, Junier, Kalhor, Kiefer, Kim, Krivega, Kurukuti, Langowski, Lee, Lieberman-Aiden, Marenduzzo, Mateos-Langerak, Mukhopadhyay, Murrell, Ong, Palstra, Phillips, Ragoczy, Reuillon, Rosa, Rousseau, Ryan K. Dale, Schoenfelder, Sexton, Sexton, Simonis, Song, Song, Splinter, Stamatoyannopoulos, Strick, Tolhuis, Vakoc, Wallace, Yaffe   +56 more
core   +5 more sources

Multidimensional OMICs reveal ARID1A orchestrated control of DNA damage, splicing, and cell cycle in normal‐like and malignant urothelial cells

Molecular Oncology, EarlyView.
Loss of the frequently mutated chromatin remodeler ARID1A, a subunit of the SWI/SNF cBAF complex, results in less open chromatin, alternative splicing, and the failure to stop cells from progressing through the cell cycle after DNA damage in bladder (cancer) cells. Created in BioRender. Epigenetic regulators, such as the SWI/SNF complex, with important
Rebecca M. Schlösser, Florian Krumbach, Eyleen Corrales, Geoffroy Andrieux, Christian Preisinger, Franziska Liss, Alexandra Golzmann, Melanie Boerries, Kerstin Becker, Ruth Knüchel, Stefan Garczyk, Bernhard Lüscher   +11 more
wiley   +1 more source