Results 71 to 80 of about 795,957 (364)

In the absence of ATPase activity, pre-RC formation is blocked prior to MCM2-7 hexamer dimerization [PDF]

, 2013
The origin recognition complex (ORC) of Saccharomyces cerevisiae binds origin DNA and cooperates with Cdc6 and Cdt1 to load the replicative helicase MCM2–7 onto DNA. Helicase loading involves two MCM2–7 hexamers that assemble into a double hexamer around
A. Fernandez-Cid, A. Riera, Bell, Bowers, Bray, C. Evrin, C. Speck, Casas-Terradellas, Chen, Cocker, Coleman, Costa, Donovan, Dueber, Gillespie, Herbig, Holm, J. Zech, Klemm, Krupinski, Laemmli, Liang, Liang, Liu, M. C. Herrera, Mizushima, Neuwald, P. Clarke, Perkins, R. Lurz, Randell, Remus, Remus, Roy, S. Brill, Schepers, Seki, Singleton, Steven, Stoeber, Takara, Tanaka, Watanabe, Weinreich, Wendler, Williams, Ying, Zhang   +47 more
core   +1 more source

Theoretical Studies of the ATP Hydrolysis Mechanism of Myosin [PDF]

Biophysical Journal, 2001
The ATP hydrolysis mechanism of myosin was studied using quantum chemical (QM) and molecular dynamics calculations. The initial model compound for QM calculations was constructed on the basis of the energy-minimized structure of the myosin(S1dc)-ATP complex, which was determined by molecular mechanics calculations.
Noriaki Okimoto, Minoru Tsuda, Kazunori Yamanaka, T. Hoshino, Masayuki Hata, Junko Ueno   +5 more
openaire   +3 more sources

P‐glycoprotein modulates the fluidity gradient of the plasma membrane of multidrug resistant CHO cells

FEBS Letters, EarlyView.
To explore the impact of the overexpression of the multidrug‐transporter P‐glycoprotein (ABCB1) on membrane fluidity, we compared the transversal gradient of mobility and microviscosity in plasma membranes of drug‐sensitive Chinese hamster ovary cells (AuxB1) and their multidrug‐resistant derivatives (B30) using the fluorescent n‐(9‐anthroyloxy) fatty ...
Roger Busche, John R. Riordan, Burkhard Tümmler   +2 more
wiley   +1 more source

Understanding Mechanochemical Coupling in Kinesins Using First-Passage Time Processes

, 2004
Kinesins are processive motor proteins that move along microtubules in a stepwise manner, and their motion is powered by the hydrolysis of ATP. Recent experiments have investigated the coupling between the individual steps of single kinesin molecules and
A. B. Kolomeisky, A. B. Kolomeisky, A. Yildiz, Alex A. Popov, Anatoly B. Kolomeisky, D. Bray, Evgeny B. Stukalin, H. Lodish, J. Howard, K. Svoboda, M. E. Fisher, N. G. van Kampen   +11 more
core   +1 more source

The Metal Coordination of sCD39 during ATP Hydrolysis [PDF]

BMC Biochemistry, 2001
The hydrolysis of ATP and ADP by ecto-nucleoside triphosphate diphosphohydrolase 1 (CD39) requires divalent cations, like Ca2+ and Mg2+. In spite of considerable work, it is not clear whether divalent cations bind to the enzyme in the absence of nucleotide or only as nucleotide-Me+2 complex. Here we study the protein ligands for Me+2.When VO2+ was used
Guido Guidotti, Wei Chen
openaire   +3 more sources

Disruption of SETD3‐mediated histidine‐73 methylation by the BWCFF‐associated β‐actin G74S mutation

FEBS Letters, EarlyView.
The β‐actin G74S mutation causes altered interaction of actin with SETD3, reducing histidine‐73 methylation efficiency and forming two distinct actin variants. The variable ratio of these variants across cell types and developmental stages contributes to tissue‐specific phenotypical changes. This imbalance may impair actin dynamics and mechanosensitive
Anja Marquardt, Marcus S. Münchhoff, Jacqueline Krohn, Philip M. Palarz, Manuel H. Taft, Johannes N. Greve, Nataliya Di Donato, Falk F. R. Buettner, Dietmar J. Manstein   +8 more
wiley   +1 more source

A guanosine 5′-triphosphate-dependent protein kinase is localized in the outer envelope membrane of pea chloroplasts [PDF]

, 1988
A guanosine 5-triphosphate (GTP)-dependent protein kinase was detected in preparations of outer chloroplast envelope membranes of pea (Pisum sativum L.) chloroplasts.
A.M. Edelman, A.R. Ashton, C. foyer, C. Schindler, C.V.C. Glover, D.J. Arnon, F.A. Ventimiglia, G.E. Lienhard, G.M. Hathaway, G.M. Hathaway, G.M. Hathaway, H. Erdmann, H. Hidaka, J. Joyard, J. Soll, J. Soll, J. Soll, J. Soll, J.F. Allen, J.F. Kuo, J.G. Chafouleas, K. Birkenhead, K. Cline, K. Keegstra, P. Bhalla, R. Ranjeva, R.A. Douce, R.J.H. Budde, S. Gowda, S. Murakami, S.J. Coughlan, T.F.J. Yan, U.K. Laemmli, W.A. Laing, Z.F. Lin   +34 more
core   +1 more source

Cyclic nucleotide signaling as a drug target in retinitis pigmentosa

FEBS Letters, EarlyView.
Disruptions in cGMP and cAMP signaling can contribute to retinal dysfunction and photoreceptor loss in retinitis pigmentosa. This perspective examines the mechanisms and evaluates emerging evidence on targeting these pathways as a potential therapeutic strategy to slow or prevent retinal degeneration.
Katri Vainionpää, Ahmed B. Montaser, Henri Leinonen   +2 more
wiley   +1 more source

Inter-domain communication mechanisms in an ABC importer: a molecular dynamics study of the MalFGK2E complex. [PDF]

PLoS Computational Biology, 2011
ATP-Binding Cassette transporters are ubiquitous membrane proteins that convert the energy from ATP-binding and hydrolysis into conformational changes of the transmembrane region to allow the translocation of substrates against their concentration ...
A Sofia F Oliveira, António M Baptista, Cláudio M Soares   +2 more
doaj   +1 more source

Drug transport mechanism of P-glycoprotein monitored by single molecule fluorescence resonance energy transfer

, 2011
In this work we monitor the catalytic mechanism of P-glycoprotein (Pgp) using single-molecule fluorescence resonance energy transfer (FRET). Pgp, a member of the ATP binding cassette family of transport proteins, is found in the plasma membrane of animal
Boersch, Michael, Ernst, Stefan, Verhalen, Brandy, Wilkens, Stephan, Zarrabi, Nawid   +4 more
core   +1 more source