Results 61 to 70 of about 3,701,025 (306)

Ram pressure feeding super-massive black holes [PDF]

, 2017
When supermassive black holes at the center of galaxies accrete matter (usually gas), they give rise to highly energetic phenomena named Active Galactic Nuclei (AGN).
A Boselli, A Boselli, A Bressan, A Cava, A Moretti, A Vazdekis, Alessandro Omizzolo, Alessia Moretti, B Moore, Benedetta Vulcani, Bianca M. Poggianti, BM Poggianti, BM Poggianti, C Bellhouse, Callum Bellhouse, D Sanders, Daniela Bettoni, F Belfiore, G Chabrier, G Kauffmann, George Hau, Giovanni Fasano, GJ Ferland, H Ebeling, H Krawczynski, J Brinchmann, J Magorrian, Jacopo Fritz, JE Gunn, JF Navarro, K Bekki, K Gültekin, LJ Kewley, LJ Kewley, M Cappellari, M Cappellari, M Fossati, M Fumagalli, M Owers, M Ramos-Martinez, M Sarzi, Marco Gullieuszik, Mario Radovich, MG Allen, P Hopkins, P Marziani, R Bacon, R Bower, R Singh, R Yan, RG Sharp, S Diehl, S Schulz, S Tonnesen, S Tonnesen, S Wang, SDM White, Stephanie Tonnesen, TM Heckman, Y Jaffé, Yara L. Jaffé   +60 more
core   +2 more sources

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

Transferrin receptor 1‐mediated iron uptake supports thermogenic activation in human cervical‐derived adipocytes

FEBS Letters, EarlyView.
In this study, we found that human cervical‐derived adipocytes maintain intracellular iron level by regulating the expression of iron transport‐related proteins during adrenergic stimulation. Melanotransferrin is predicted to interact with transferrin receptor 1 based on in silico analysis.
Rahaf Alrifai, Mizuki Seo, Gyath Karadsheh, Fachrur Rizal Mahendra, Máté Á Demény, Ferenc Győry, János András Mótyán, László Fésüs, Endre Kristóf, Rini Arianti   +9 more
wiley   +1 more source

Enhancing Mn‐Activated Mechanoluminescence via Pressure‐Regulated Local Structure in Centrosymmetric BaZnOS for Dynamic Response Applications

Advanced Science
Self‐recoverable mechanoluminescence (ML), typically observed in non‐centrosymmetric luminescent materials, has recently been reported in centrosymmetric systems such as Mn‐activated BaZnOS.
Hao Wang, Bohao Zhao, Tingting Zhao, Mei Li, Shang Peng, Xuqiang Liu, Yanlong Chen, Jiao An, Sheng Jiang, Yue‐chao Wang, Chuanlong Lin, Wenge Yang   +11 more
doaj   +1 more source

Simple Patient-Based Transmantle Pressure and Shear Estimate From Cine Phase-Contrast MRI in Cerebral Aqueduct [PDF]

, 2012
From measurements of the oscillating flux of the cerebrospinal fluid (CSF) in the aqueduct of Sylvius, we elaborate a patient-based methodology for transmantle pressure (TRP) and shear evaluation.
Balédent, Olivier, Bardan, Gérald, Plouraboué, Franck, Zagzoule, Mokhtar   +3 more
core   +4 more sources

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

Cooperativity in light scattering by cold atoms

, 2012
A cloud of cold N two-level atoms driven by a resonant laser beam shows cooperative effects both in the scattered radiation field and in the radiation pressure force acting on the cloud center-of-mass.
Bachelard, Romain, Bienaime, Tom, Kaiser, Robin, Piovella, Nicola   +3 more
core   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source