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ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 65, Number 3
JKCSEZ 65(3)
June 20, 2021 |
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Title |
MD Simulation Study for Preferred Structure of Glycerol Backbone in 1,2-dioleoylsn-glycero-3-phosphocholine (DOPC) Molecule According to Solvent Properties
용매 특성에 따른 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) 분자에서 글리세롤 골격 구조에 대한 MD 시뮬레이션 연구
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Author |
Ji yun Yang, Eugene Huh, Ik sung Ahn*, Byung jin Mhin*
양지현, 허유진, 안익성*, 민병진* |
Keywords |
분자동역학, 인지질, 유전상수, 표면장력, 글리세롤 골격구조
, Molecular dynamics, Phospholipid, Dielectric constant, Surface tension, Glycerol backbone
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Abstract |
본 연구에서는 용매 특성에 따른 인지질 내 글리세롤 골격 구조 변화를 알아보기 위해서 1,2-dioleoyl-sn-glycero-3- phosphocholine (DOPC) 단분자에 대한 분자동역학 시뮬레이션을 용매 특성을 변화시켜가며 진행하였다. DOPC 골격구조는 인 지질 내 글리세롤 C1-C2 결합의 비틀림각에 따라 A(θ3 = trans, θ4 = gauche), B(θ3 = gauche, θ4 = gauche-), C(θ3 = gauche-, θ4 = trans) 세가지 형태로 구분된다. 용매의 유전상수와 표면장력을 변수로 하여 DOPC의 골격 구조 변화를 살펴본 결과, 유전상수가 증가 할수록, 표면장력이 클수록 B 구조의 빈도가 증가하였으며 그 이유는 B 구조의 solvation 에너지가 A에 비해서 더 크고, 표면적 이 A에 비해서 작기 때문이다. 이러한 연구 결과는 추후 인지질 구조 연구에 활용될 것으로 기대된다.
In this study, the molecular dynamics simulation of 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) single molecule was conducted by changing the solvent properties in order to investigate the change in the glycerol backbone structure in phospholipids according to the solvent properties. DOPC has three different conformations according to glycerol C1- C2 bond: A(θ3 = trans, θ4 = gauche), B(θ3 = gauche, θ4 = gauche-), C(θ3 = gauche-, θ4 = trans). Changes in the glycerol backbone structure of the DOPC were examined using the solvent’s dielectric constant and surface tension constant as variables. As a result, the population of the B structure increased as the dielectric constant increased. The reason is that the solvation energy of the B structure is larger than that of A. In addition, as the surface tension constant increased, the population of the B structure increased because the surface area of B was smaller than that of A. The results of these studies are expected to be used in the study of phospholipid structure in the future.
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179 - 184 |
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