cAMP sensitive nanochannels driven by conformational transition of a tripeptide-based smart polymer

2020 ◽  
Vol 56 (23) ◽  
pp. 3425-3428
Author(s):  
Shengyan Ji ◽  
Yuting Xiong ◽  
Wenqi Lu ◽  
Minmin Li ◽  
Xue Wang ◽  
...  
Keyword(s):  
Conformational Transition ◽  
Polymer Chains ◽  
Smart Polymer ◽  
Coil Transition ◽  
Opening And Closing

The opening and closing of nanochannels are precisely manipulated by cAMP through globule to coil transition of smart polymer chains.

cAMP-modulated biomimetic ionic nanochannels based on a smart polymer

2019 ◽  
Vol 7 (23) ◽  
pp. 3710-3715 ◽  
Author(s):  
Zhixiang Chen ◽  
Taolei Sun ◽  
Guangyan Qing
Keyword(s):  
Conformational Transition ◽  
Adenosine Monophosphate ◽  
Specific Adsorption ◽  
Polymer Chains ◽  
Smart Polymer

Dynamic gating behaviour of ionic nanochannel is precisely manipulated by cyclic 3′,5′-adenosine monophosphate (cAMP) by taking advantage of reversible conformational transition of the smart polymer chains in response to cAMP specific adsorption, which provides a new idea for developing smart nanochannels regulated by crucial signal-biomolecules.

THE HELIX-COIL TRANSITION IN A DOUBLE-STRANDED POLYNUCLEOTIDE AND THE TWO-DIMENSIONAL RANDOM WALK

2012 ◽  
Vol 26 (13) ◽  
pp. 1250083
Author(s):  
G. N. HAYRAPETYAN ◽  
V. F. MOROZOV ◽  
V. V. PAPOYAN ◽  
S. S. POGHOSYAN ◽  
V. B. PRIEZZHEV
Keyword(s):  
Random Walk ◽  
Hydrogen Bonds ◽  
Polymer Chains ◽  
Square Lattice ◽  
Two Dimensional ◽  
Competing Interactions ◽  
New Approach ◽  
Rich Phase ◽  
Coil Transition ◽  
The Rich

The helix-coil transition in a double-stranded homopolynucleotide is considered. The new approach to the melted loops account is proposed. The relative distance between the corresponding monomers of two polymer chains is modeled by the two-dimensional random walk on the square lattice. Returns of the random walk to the origin describe the formation of hydrogen bonds between complementary units. To take into account the interaction of monomers inside the chains, we consider various regimes of return to the origin. One of them involves two competing interactions and demonstrates a nontrivial sharp denaturation transition. The rich phase behavior of the double-stranded homopolynucleotide is discussed in terms of the proposed approach.

scholarly journals Conformational Transitions of Polymer Chains in Solutions Characterized by Fluorescence Resonance Energy Transfer

Polymers ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1007 ◽  
Author(s):  
Linlin Qin ◽  
Linling Li ◽  
Ye Sha ◽  
Ziyu Wang ◽  
Dongshan Zhou ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Fluorescence Resonance Energy Transfer ◽  
Conformational Changes ◽  
Conformational Transition ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Polymer Chains ◽  
Donor And Acceptor ◽  
Transition Concentration ◽  
Fluorescence Resonance

The critical overlap concentration C* is an important concept in polymer solutions and is defined as the boundary between dilute and semidilute regimes. In this study, the chain conformational changes of polystyrene (PS) with both high (Mn = 200,000 Da) and low (Mn = 13,000 Da) molecular weights in cis-decalin were compared by intrachain fluorescence resonance energy transfer (FRET). The random labeling of donor and acceptor chromophores strategy was employed for long PS chains, whereas chain-end labeling was used for short PS chains. By monitoring the spectroscopic intensity ratio between acceptor and donor, the concentration dependence on chain conformation from dilute to semidilute solutions was determined. Both long and short chains exhibit a conformational transition concentration, above which the polymer chains begin to collapse with concentration significantly. Interestingly, for randomly labeled polymer long chains, such concentration is consistent with C* determined from the viscosity result, below which only slight conformational change of polymer chain takes place. However, for the chain-end labeled short chain, the conformational transition concentration takes place earlier than C*, below which no significant polymer conformation change is observed.

Series enumeration study of the rod-to-coil transition of linear polymer chains

1987 ◽  
Vol 67 (1) ◽  
pp. 129-138 ◽  
Author(s):  
V. Privman ◽  
S. Redner
Keyword(s):  
Polymer Chains ◽  
Linear Polymer ◽  
Coil Transition

Low-frequency mechanical spectroscopy study of conformational transition of polymer chains in concentrated solutions

2008 ◽  
Vol 79 (12) ◽  
pp. 126105 ◽  
Author(s):  
Xuebang Wu ◽  
Qiaoling Xu ◽  
Jiapeng Shui ◽  
Zhengang Zhu
Keyword(s):  
Conformational Transition ◽  
Low Frequency ◽  
Polymer Chains ◽  
Spectroscopy Study ◽  
Mechanical Spectroscopy ◽  
Concentrated Solutions

scholarly journals Polymers with pendant ferrocenes

2016 ◽  
Vol 45 (19) ◽  
pp. 5216-5231 ◽  
Author(s):  
Rudolf Pietschnig
Keyword(s):  
Polymer Chains ◽  
Smart Polymer ◽  
The Difference

Charges make the difference in the arrangement of smart polymer chains and networks.

The Coil-to-Globule-to-Coil Transition of Linear Polymer Chains in Dilute Aqueous Solutions: Effect of Intrachain Hydrogen Bonding

2008 ◽  
Vol 41 (22) ◽  
pp. 8927-8931 ◽  
Author(s):  
Kejin Zhou ◽  
Yijie Lu ◽  
Junfang Li ◽  
Lei Shen ◽  
Guangzhao Zhang ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Aqueous Solutions ◽  
Polymer Chains ◽  
Linear Polymer ◽  
Coil Transition ◽  
Dilute Aqueous Solutions

Vapour-driven crystal-to-crystal transformation showing an interlocking switch of the coordination polymer chains between 1D and 3D

CrystEngComm ◽  
2018 ◽  
Vol 20 (24) ◽  
pp. 3297-3301 ◽  
Author(s):  
Li Sun ◽  
Rui-Yun Guo ◽  
Xiao-Dong Yang ◽  
Shuai Ma ◽  
Jie Zhang
Keyword(s):  
Coordination Polymer ◽  
Coordination Mode ◽  
Polymer Chains ◽  
Crystal Transformation ◽  
1D Coordination Polymer ◽  
Opening And Closing

A rare crystal-to-crystal transformation occurs between 1D coordination polymer chains and 3D mechanically interlocked structures via reversible opening and closing of the homogeneous chains without any change in the coordination mode and composition.

Opening and Closing Doors to Women's Careers.

PsycCRITIQUES ◽  
1991 ◽  
Vol 36 (6) ◽  
Author(s):  
Janice D. Yoder
Keyword(s):  
Women's Careers ◽  
Women’S Careers ◽  
Opening And Closing
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