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Bioinformatics in the Post-genome Era
Yu, Ung-Sik,Lee, Sung-Hoon,Kim, Young-Joo,Kim, Sang-Soo Korean Society for Biochemistry and Molecular Biol 2004 Journal of biochemistry and molecular biology Vol.37 No.1
Recent years saw a dramatic increase in genomic and proteomic data in public archives. Now with the complete genome sequences of human and other species in hand, detailed analyses of the genome sequences will undoubtedly improve our understanding of biological systems and at the same time require sophisticated bioinformatic tools. Here we review what computational challenges are ahead and what are the new exciting developments in this exciting field.
흰쥐 해마에서 경련에 의해 발현 유도된 MKP-1에 의한 MAPK 활성 조절
유범희,강웅구,안용민,정선주,전송희,박주배,김용식 大韓神經精神醫學會 1999 신경정신의학 Vol.38 No.4
연구목적 : 전기경련 충격(Electroconvulsive shock, ECS) 및 카이닌산(kainic acid)에 의한 경련은 흰쥐 해마에서 mitogen activated protein kinase(MAPK)를 활성화시키며, 동시에 MAPK 불활성화 효소인 MAPK phosphatase-1(MKP-1)의 발현을 일으킨다. 이 연구의 목적은 경련에 의해 발현된 MKP-1이 역시 경련에 의해 활성화된 MAPK의 불활성화에 관여하는지를 알아보고자 하는 것이다. 방 법 : 흰쥐에 ECS를 가하여 해마에서 MKP-1 발현을 일으킨 뒤 다시 ECS를 가하고, 두 번째 ECS에 의한 MAPK의 일시적 활성화가 MKP-1의 발현상태에 의해 영향받는지를 알아보았다. 또한 흰쥐에 지속적인 MAPK 활성화 및 MKP-1 발현을 일으키는 카이닌산을 투여한 뒤 해마에서 MKP-1의 발현과 MAPK 활성과의 관계를 알아보았다. 결 과 : ECS후 해마에서 타이로신 인산화 면역블롯 및 효소활성으로 측정한 MAPK의 인산화 및 활성은 MKP-1의 발현이 일어나 있는 경우와 그렇지 않은 경우 사이에 차이를 보이지 않았다. 카이닌산의 투여에 의해 MAPK 활성화가 일어나는 경우, 뒤이어 MKP-1 발현이 일어나지만, 이렇게 발현된 MKP-1은 MAPK 활성을 충분히 감소시키지 못하였다. 결 론 : MKP-1은 흰쥐 해마에서 ECS 및 카이닌산에 의한 MAPK의 활성화를 차단하는데 큰 역할을 하지 않는다. Objectives : Both electroconvulsive shock(ECS)- and kainic acid-induced seizures activate mitogen-activated protein kinases(MAPKs) in rat hippocampus. They can also induce the expression of MAPK phosphatase-1(MKP-1) in rat hippocampus. MKP-1 is known as a specific MAPK deactivator. This study aimed to elucidate the role of MKP-1 in the deactivation of MAPKs in rat hippocampus. Methods : In order to induce MKP-1 in the hippocampus, ECS was given to the rats. At the time points when MKP-1 was sufficiently induced, the second ECS was given to them and the subsequent phosphorylation or activation of MAPKs were measured in the hippocampus. A second group of rats were injected with kainic acid and the relationship between MKP-1 expression and MAPK phosphorylation was examined in their hippocampi. Results : The expression of MKP-1 did not influence the phosphorylation or activation of MAPKs following ECS in rat hippocampus. Kainic acid-induced expression of MKP-1 did not significantly reduce the phosphorylation of MAPKs. Conclusion : MKP-1 did not play a significant role in the deactivation of MAPKs which were activated by ECS or kainic acid in rat hippocampus.
Microcystis sp. 의 오존접촉특성 및 부산물 생성에 관한 연구
김영웅(Young Ung Kim),손희종(Hee Jong Son),유명호(Myung Ho Yu),이춘식(Chun Sik Lee),김성윤(Seong Yun Kim) 한국물환경학회 2000 한국물환경학회지 Vol.16 No.4
This study investigated the removal characteristics, Microcystin decomposition and generation of by-products when aqueous Microcystis sp. is oxidized by ozone. The concentration of Microcystin (MC) in aqueous solution has been found by HPLC analysis to decrease continuously by ozonation after the initial, abrupt increase. The kinetic constant of the decomposition of MC-RR and -LR were 0.0596 and 0.0243, respectively. This means that removal efficiency of MC-RR by its oxidative decomposition is preferable compared with that of MC-LR. On the other hand, it has been found that the decomposition product, TOC, exhibits the continuous decrease in the concentration by further ozonation, while DOC and UV-254 increase temporarily until 10 minutes before the decrease. Furthermore, the GC/MSD analysis has revealed that the ozonation of Microcystis sp. for 100minutes affords five kinds of aldehydes, six kinds of alcohols, and trans-1, 2-dimethyl-cyclopropane.
Illudins C_2 and C_3, New Illudin C Derivatives from Coprinus atramentarius ASI20013
LEE, IN-KY0UNG,JEONG, CHEOL-YOUN,CHO, SOO-MUK,YUN, BONG-SIK,KIM, YANG-SUP,YU, SEUNG-HUN,KOSHINO, HIROYUKI,YOO, ICK-DONG 충남대학교 생물공학연구소 1997 생물공학연구지 Vol.5 No.-
Ganoderma lucidum 균주는 인공 배지 상에서 광에 의하여 자실체 원기가 형성되었으며, 광질이 자실체 원기 형성에 미치는 영향을 조사한 결과, 자실체 원기 형성능을 가지고 있는 5균주중 3균주는 공시한 모든 형광등의 아래에서 즉, BLB, 순청색, 순녹색, 순황색, 순적색 형광등의 아래에서 자실체 원기가 형성되었고, 2균주는 BLB 형광등을 제외한 가시광선 영역에서 형성되었다. 그러나 암상태에서는 공시한 모든 균주가 자실체를 형성하지 않았다. 자실체 원기는 광도 0.05에서 10.0 μmol m^-2 s^-1의 범위에서 형성되었고, 광도가 0.5 μmol m^-2 s^-1 이상에서는 자실체 원기의 수가 감소하였다. 주기적인 광조사가 자실체 원기의 형성에 미치는 영향을 조사한 결과, G1-009 균주는 자실체 원기의 수와 무게가 연속광을 조사한 경우보다 증가하였다. 자실체 원기를 형성하기 위해서는 최소 4일간의 광조사가 필요하였다. 단색광의 조사가 자실체 원기의 형성에 미치는 영향을 조사한 결과 G1-003 균주는 400에서 800 nm의 모든 단색광 처리구에서 자실체 원기가 형성되었고, 그 외의 4균주는 400에서 500 nm, 그리고 700에서 750 nm 범위에서 형성되었다. The objective of this research was to determine the effect of light quality on formation of fruit body primordia (FBPs) of Ganoderma lucidum. To achieve this 5 isolates of the fungus that develops fruit body primordia on nutrient agar media were incubated with or without continuous irradiation. The fluorescent lamps used different colors such as black light blue (BLB), pure blue (P-B), pure green (P-G), pure yellow (P-Y) and pure red (P-R). Effect of periodic light and dark exposures on FBP formation of isolate G1-009 was investigated. The FBP formation in G. lucidum isolates was also tested under nomochromatic light produced by the combination of interference filters and colored glass filters. Three isolates produced FBPs under all kinds of fluorescent lamps, whereas two induced FBPs only under visible light except for BLB fluorescent lamp. However, these isolated did not form FBPs in the dark. The FBP was formed at light intensity from 0.05 to 10.0 μmol m^-2 s^-1, and begun to reduce its number as light intensity increase over 0.5 μmol m^-2 s^-1. When the isolate was incubated under periodic light and dark exposures, the number and weight of FBP increased as compared with those under continuous light. Initiation of FBP requires at least 4 days of light illumination. Although isolate G1-003 produced FBPs in a wide range of 400 to 800 nm, other four isolates had two effective regions 400 to 500 nm and 700 to 750 nm in FBP formation.