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The Binding of Phytochrome-Cyclic AMP and Phytochrome-Estriol Complexes to the Liposome
김학룡,채쾌,Kim, Hak-Yong,Chae, Quae 생화학분자생물학회 1987 한국생화학회지 Vol.20 No.3
C-AMP와 estriol이 존재할때와 존재하지 않을때, phytochrome이 liposome에 결합하는 정도를 측정하였다. 이들 화합물들이 존재할때 phytochrome이 (특히 Pfr형태) liposome에 더 잘 결합한다는 것이 관찰되었다. 그러나 이들 두 경우에 있어서 결합 양상은 다르게 나타났다. Phytochrome-c-AMP 복합체를, Cholesterol이 없는 liposome에 결합시켰을 때, liposome의 농도가 낮은 초기 상태에서는 결합이 얼어나지 않았다. 반면 phytochrome-estriol 복합체의 경우 liposeme 첨가의 초기 상태에서도 결합이 일어났다. Phytochrome-c-AMP 복합체의 difference 흡수 스펙트럼 (Pr vs Pfr)은 free phytochrome의 그것과 동일 하였다. 그러나 liposome을 첨가 하였을때, difference 흡수 스펙트럼이 600-630 nm 파장 부근에서 증가하였다. 이러한 결과들은 마음의 사실들을 시사해주고 있다. 1) Estriol은 phytochrome의 chromophore 또는 ANS 결합부위와 동일하다고 생각되어지는 반면 c-AMP는 이들 결함부위와 다르다는 사실이다. 2) Phytochrome-estriol 및 phytochrome-ANS 복합체의 경우와는 달리 phytoahrome-c-AMP 복합체는 liposome에 결합하는데 있어서 정전기적 상호작용의 선행을 포함 한다는 사실이다. The binding ability of phytochrome to the liposome was checked in the presence and the absence of cyclic-AMP and estriol, respectively. The enhancement of the phytochrome binding (particularly Pfr form) to the liposome was observed in the presence of those compounds. However, the mode of enhancement was revealed to be different in the two cases. The phytochrome-c-AMP complex could even bind to the liposome prepared without cholesterol. At the stage of low concentration of liposome, no binding was occurred in this complex. On the other hand, the phytochrome-estriol complex could bind to the liposome from the initial stage of liposome addition. The difference absorption spectrum (Pr vs Pfr) of the phytochrome-c-AMP complex was essentially identical with the one of free phytochrome. But upon addition of liposome, the absorbance difference appeared to increase at the wavelength range of 600-630 nm. These results imply that 1) the binding site of c-AMP in phytochrome must be different with the one of estriol which is believed to be the same site of ANS and/or chromophore, 2) an electrostatic interaction is primarily involved in binding of phytochrome-c-AMP complex to the liposome in contrast with the cases of phytochrome-estriol and phytochrome-ANS complexes.
Phytochrome - Cyclic AMP 및 Phytochrome - Estriol 복합제와 Liposome 과의 결합
김학룡,채쾌 ( Hak Yong Kim,Quae Chae ) 생화학분자생물학회 1987 BMB Reports Vol.20 No.3
The binding ability of phytochrome to the liposome was checked in the presence and the absence of cyclic-AMP and estriol, respectively. The enhancement of the phytochrome binding (particularly Pfr form) to the liposome was observed in the presence of those compounds. However, the mode of enhancement was revealed to be different in the two cases. The phytochrome-c-AMP complex could even bind to the liposome prepared without cholesterol. At the stage of low concentration of liposome, no binding was occurred in this complex. On the other hand, the phytochrome-estriol complex could bind to the liposome from the initial stage of liposome addition. The difference absorption spectrum (Pr vs Pfr) of the phytochrome-c-AMP complex was essentially identical with the one of free phytochrome. But upon addition of liposome, the absorbance difference appeared to increase at the wavelength range of 600-630 nm. These results imply that 1) the binding site of c-AMP in phytochrome must be different with the one of estriol which is believed to be the same site of ANS and/or chromophore, 2) an electrostatic interaction is primarily involved in binding of phytochrome-c-AMP complex to the liposome in contrast with the cases of phytochrome-estriol and phytochrome-ANS complexes.
김학룡(Hak Yong Kim),최만준(Man Jun Choi),방만자(Man Ja Bang) 한국사회체육학회 1995 한국사회체육학회지 Vol.4 No.-
The research was studied to examine how much influence to self-awareness recovering from the development utility of health gymnastics. The results were drawn as follows. 1. The majority of teachers hoped the necessity and the practice of gymnastics for fatigue recovering. 2. The rate of answer every self-awareness decreased physical symptoms group 17.3%, mental 2.68%, nervous 2.23% in order. 3. Developed health gymnastics (15 exercise contents). 4. Supported hypothesis ① to judging from influence to the improvement of survey and capability test from health gymnastics practice. 5. Supported hypothesis ② to judging from influence to the removing to fatigue self-awareness symptom from health gymnastics practice.
칼슘이온 influx 에 미치는 Cholesterol 과 Phytosterol 의 효과
여종원,김학룡,양덕조,채쾌 ( Jong Won Yeo,Hak Yong Kim,Deok Cho Yang,Quae Chae ) 생화학분자생물학회 1990 BMB Reports Vol.23 No.1
There is a report that cholesterol and/or some sterols give a positive effect on flowering of plants. Under assumption that the phenomenon can be induced by the enhancement of Ca^(2+) influx through the interaction between cholesterol and the plasma membrane, we carried out the experiment to determine whether the change of the cytosolic Ca ^(2+) concentration could be induced by binding of these compounds to the plasma membrane of oat protoplast. The results show a linear increase of the cytosolic Ca^(2+) concentration as a function of cholesterol concentrations added to the protoplast. However, other phytosterols (sitosterol and stigmasterol) were ineffective. The cytosolic Ca^(2+) concentration was determined by using a calcium specific fluorescent indicator Quin II. Red light effect on Ca^(2+) influx was also investigated in the normal protoplast and the cholesterol bound one. In comparision with the control, a higher influx of Ca^(2+) in the case of the cholesterol bound protoplast was observed when irradiated with red light. However, when the Ca^(2+), influx was blocked by 2 mM EGTA, the cytosolic Ca^(2+) concentration was not changed by cholesterol addition, but slightly increased by irradiation with red light.
칼슘이온 influx 에 미치는 Cholesterol 과 Phytosterol 의 효과
양덕조,채쾌,김학룡,여종원 생화학분자생물학회 1994 BMB Reports Vol.17 No.3
There is a report that cholesterol and/or some sterols give a positive effect on flowering of plants. Under assumption that the phenomenon can be induced by the enhancement of Ca^(2+) influx through the interaction between cholesterol and the plasma membrane, we carried out the experiment to determine whether the change of the cytosolic Ca ^(2+) concentration could be induced by binding of these compounds to the plasma membrane of oat protoplast. The results show a linear increase of the cytosolic Ca^(2+) concentration as a function of cholesterol concentrations added to the protoplast. However, other phytosterols (sitosterol and stigmasterol) were ineffective. The cytosolic Ca^(2+) concentration was determined by using a calcium specific fluorescent indicator Quin II. Red light effect on Ca^(2+) influx was also investigated in the normal protoplast and the cholesterol bound one. In comparision with the control, a higher influx of Ca^(2+) in the case of the cholesterol bound protoplast was observed when irradiated with red light. However, when the Ca^(2+), influx was blocked by 2 mM EGTA, the cytosolic Ca^(2+) concentration was not changed by cholesterol addition, but slightly increased by irradiation with red light.