Protonation and orientation: a computational approach to cocaine diffusion through a model membrane
文献情報
Nora Kremer, Safa Ben Amara, Ali Zaidi, Thorsten Koslowski
We study the diffusion of cocaine through a DMPC lipid bilayer as an example of a protonable, amphiphilic molecule passing a biological membrane. Using classical molecular dynamics simulations, the free energy surfaces are computed applying the umbrella sampling technique for the protonated and the neutral molecule. For the combined surface, we numerically solve the diffusion equation at constant flow and for time-dependent concentrations. We find a potential of mean force dominated by a barrier of 3.5 kcal mol−1 within the membrane, and a pH-dependent entry and exit barrier of 2.0 kcal mol−1 and 4.1 kcal mol−1, respectively. This behaviour can be rationalized chemically by the amphiphilic nature of the molecule and the change of its protonation state while passing the membrane. Diffusion through the barriers is 3.5 times slower than along the membrane, and the typical time scale of passage amounts to 0.1 ms. We discuss biochemical and medical implications of our findings, and comment on the mechanism of the drug passing the blood–brain barrier.
おすすめジャーナル
関連文献
Novel ⊕N(←L)2 species with two lone pairs on nitrogen: systems isoelectronic to carbodicarbenes
Dhilon S. Patel, Prasad V. Bharatam
DOI: 10.1039/B816595E
Supramolecular self-assembly of amphiphilic hyperbranched polymers at all scales and dimensions: progress, characteristics and perspectives
Yongfeng Zhou, Deyue Yan
DOI: 10.1039/B814560C
Multiply reconfigurable ‘plug and play’ molecular logic via self-assembly
A. Prasanna de Silva, Catherine M. Dobbin, Thomas P. Vance
DOI: 10.1039/B822181B
Amphiphilic block copolymers based on cyclodextrinhost–guest complexes via RAFT-polymerization in aqueous solution
Heike S. Köllisch, Christopher Barner-Kowollik, Helmut Ritter
DOI: 10.1039/B818897A
Stereoselective Reformatskii–Claisen rearrangement: synthesis of 2′,3′-dideoxy-6′,6′-difluoro-2′-thionucleosides
Feng Zheng, Xingang Zhang, Feng-Ling Qing
DOI: 10.1039/B819289H
Solid-phase based total synthesis of Jasplakinolide by ring-closing metathesis
Tai-Shan Hu
DOI: 10.1039/B900342H
Transition metalborylene complexes: boron analogues of classical organometallic systems
Dragoslav Vidovic, Glesni A. Pierce, Simon Aldridge
DOI: 10.1039/B816042B
Aluminananowire forests via unconventional anodization and super-repellency plus low adhesion to diverse liquids
Xiaolong Wang, Miao Chen, Feng Zhou, Weimin Liu, Qunji Xue
DOI: 10.1039/B818633B
Bisbenzimidazole to benzobisimidazole: from binding B-form duplex DNA to recognizing different modes of telomereG-quadruplex
Jing Huang, Guorui Li, Zhiguo Wu, Zhibin Song, Yangyang Zhou, Liang Shuai, Xiaocheng Weng, Xiang Zhou, Guangfu Yang
DOI: 10.1039/B819789J
こちらもおすすめ
H-Leu-Ser-Lys-Leu-OH trifluoroacetate saltに適用される法規ガイドラインは何ですか?
CAS番号162559-45-7のH-Leu-Ser-Lys-Leu-OH trifluoroacetate saltは、GHS( Chemicals Clas...
Trimethyltin Chlorideの物理化学的性質は何ですか?
CAS番号1066-45-1のトリメチルチリドは、白色結晶性粉末で、分子量は297.77です。この化合物は水にわずかに溶けますが、酢酸、エタノール、ジエチルエー...
ニコール酸化物水和物の主な用途は何ですか?
ニコール酸化物水和物は、主に金属分離、研磨剤、酸化剤、染料製造の原料として利用されます。また、電気化学製品、触媒、分析化学の分野でも広く使用されています。
(2,3-二甲基-2H-吲唑-6-基)boronic acidを取り扱う際の実験室安全事項は何ですか?
(2,3-二甲基-2H-吲唑-6-基)boronic acidを取り扱う際は、PPE(防護服、ゴーグル、マスク、手袋)を使用する必要があります。ドラフトチャンバ...
4-ブロモ-1-メトキシ-2-(2-メトキシエトオキシ)ベンゼンは安全ですか?
4-ブロモ-1-メトキシ-2-(2-メトキシエトオキシ)ベンゼンは一般的に安全とは言えません。取扱いには注意が必要で、直接的な皮膚接触や吸入は避けてください。
4,4-双(5-甲基-2-苯并噁唑基)二苯乙烯はどの業界で使用されていますか?
4,4-双(5-甲基-2-苯并噁唑基)二苯乙烯は医薬業界、ポリマー業界、センサー業界、半導体業界で使用されています。特に、光触媒や蛍光材料として利用されています...
2,3,5,6-四氯-4-ピリジンスチオールを取り扱う際の実験室安全事項は何ですか?
2,3,5,6-四氯-4-ピリジンスチオールは非常に毒性があり、皮膚や粘膜に刺激を与える可能性があります。取り扱う際には、ゴーグル、ゴム手袋、防塵マスクを着用し...
TG 4-155はどのように合成されますか?
TG 4-155は、2-(2-メチル-1H-インドン-1-イル)エチルアミドと3,4,5-トリメトキシフェノールを反応させ、選択性的に合成できます。一般的には、...
エチルヒドロキシキニリン-6-カルボキシ酸は適用される法規ガイドラインは何ですか?
エチルヒドロキシキニリン-6-カルボキシ酸のCAS番号1261631-01-9は、GHS分類の第2クラスの腐食物質(皮膚に強い腐食性)に分類されます。また、EU...
掲載誌
Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.











![4-Chloro-N-{[4-(dimethylamino)phenyl]carbamoyl}benzenesulfonamide structure 4-Chloro-N-{[4-(dimethylamino)phenyl]carbamoyl}benzenesulfonamide structure](https://static.chemtradehub.com/structs/558/5581-42-0-7dcb.webp)

![N-[(1-Ethyl-2-pyrrolidinyl)methyl]-2-hydroxy-5-sulfamoylbenzamide structure N-[(1-Ethyl-2-pyrrolidinyl)methyl]-2-hydroxy-5-sulfamoylbenzamide structure](https://static.chemtradehub.com/structs/673/67381-52-6-877f.webp)
