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303 Newest Publications in biopolymers
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Geometrical constraints limiting the poly(ADP‐ribose) conformation investigated by molecular dynamics simulation
13-05-2013 | Ilda D'Annessa, Andrea Coletta, Alessandro Desideri, Biopolymers, 2013
Abstract Poly(ADP‐ribosylation) is a post transductional modification that regulates protein's function. Most of the proteins subjected to this control mechanism belong to machineries involved in DNA damage repair, or DNA interacting proteins. Poly(ADP‐ribose) polymers are long chains of ...
Steric and electronic interactions controlling the cis/trans isomer equilibrium at X‐Pro tertiary amide motifs in solution
08-05-2013 | Damodara N. Reddy, Erode N. Prabhakaran, Biopolymers, 2013
ABSTRACT A systematic understanding of the non‐covalent interactions that influence the structures of the cis conformers and the equilibrium between the cis and the trans conformers, of the X‐Pro tertiary amide motifs, is presented based on analyses of 1H‐, 13C‐NMR and FT‐IR absorption ...
Kinetic modeling of native cassava starch thermo‐oxidative degradation using weibull and weibull‐derived models
02-05-2013 | Bojan Janković, Biopolymers, 2013
ABSTRACT A new approach in kinetic modeling of thermo‐oxidative degradation process of starch granules extracted from the Cassava roots was developed. Based on thermo‐analytical measurements, three reaction stages were detected. Using Weibull and Weibull‐derived (inverse) models, it was ...
Supercoiled pseudocircular domains in single twisted DNAs under tension. Elastic constants and unwinding dynamics in complexes with Topo I
02-05-2013 | J. Michael Schurr, Bryant S. Fujimoto, Biopolymers, 2013
Abstract Extension vs. twist data of Koster et al. (ref. 43) are analyzed to obtain C for the main chain segments and the twist energy parameter (ET) for the supercoiled pseudocircular (sp) domain(s), from which C is estimated via simulations. The torsional rigidity in the tension‐free sp ...
Cell proliferation and cell sheet detachment from the positively and negatively charged nanocomposite hydrogels
02-05-2013 | Dan Liu, Tao Wang, Xinxing Liu, Zhen Tong, Biopolymers, 2013
ABSTRACT The charged nanocomposite hydrogels (NC gels) were synthesized by copolymerization of positively or negatively chargeable monomer with N‐isopropylacrylamide (NIPAm) in the aqueous suspension of hectorite clay. The ionic NC gels preserved the thermo‐responsibility with the phase ...
Polyelectrolyte properties of single stranded DNA measured using SAXS and single molecule FRET: Beyond the wormlike chain model
20-04-2013 | Steve P. Meisburger, Julie L. Sutton, Huimin Chen, Suzette A. Pabit, Serdal Kirmizialtin, Ron Elber, Lois Pollack, Biopolymers, 2013
Abstract Nucleic acids are highly charged polyelectrolytes that interact strongly with salt ions. Rigid, base‐paired regions are successfully described with worm like chain models, but non base‐paired single stranded regions have fundamentally different polymer properties because of their ...
N‐sulfotestosteronan, a novel substrate for heparan sulfate 6‐O‐sulfotransferases and its analysis by oxidative degradation
20-04-2013 | Guoyun Li, Sayaka Masuko, Dixy E. Green, Yongmei Xu, Lingyun Li, Fuming Zhang, Changhu Xue, Jian Liu, Paul. L. DeAng ..., Biopolymers, 2013
Abstract Testosteronan, an unusual glycosaminoglycan first isolated from the microbe Comamonas testosteroni, was enzymatically synthesized in vitro by transferring uridine diphosphate sugars on β‐p‐nitrophenyl glucuronide acceptor. After chemically converting testosteronan to ...
Toward engineering efficient peptidomimetics. screening conformational landscape of two modified dehydroaminoacids
20-04-2013 | Aneta Buczek, Maciej Makowski, Michał Jewgiński, Rafał Latajka, Teobald Kupka, Małgorzata A. Broda, Biopolymers, 2013
Abstract Effective peptidomimetics should posses structural rigidity and appropriate interaction pattern leading to potential spatial and electronic matching to the target receptor site. Rational design of such small bioactive molecules could push chemical synthesis and molecular modeling ...
Chemical and biological methods to detect posttranslational modifications of arginine
11-04-2013 | Daniel J. Slade, Venkataraman Subramanian, Jakob Fuhrmann, Paul R. Thompson, Biopolymers, 2013
Abstract Posttranslational modifications (PTMs) of protein embedded arginines are increasingly being recognized as playing an important role in both prokaryotic and eukaryotic biology, and it is now clear that these PTMs modulate a number of cellular processes including DNA binding, gene ...
Chemical biology approaches to study protein cysteine sulfenylation
11-04-2013 | Jia Pan, Kate S. Carroll, Biopolymers, 2013
Abstract The oxidation of cysteine thiol side chains by hydrogen peroxide to afford protein sulfenyl modifications is an important mechanism in signal transduction. In addition, aberrant protein sulfenylation contributes to a range of human pathologies, including cancer. Efforts to ...
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