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호박 (Cucurbita moschata DUCHESNE)잎에서 리보좀불활성화 단백질의 분리 및 특성
조강진,이시명,김영태,황영수 ( Kang Jin Cho,Si Myung Lee,Yeong Tae Kim,Young Soo Hwang ) 한국응용생명화학회 1997 Applied Biological Chemistry (Appl Biol Chem) Vol.40 No.5
Two ribosome-inactivating proteins, PRIP 1 and PRIP 2 have been isolated from the leaves of Cucurbita moschata D_(UCHESNE). Crude extracts were purified through ammonium sulfate precipitation and column chromatography using DE-52 cellulose, S-Sepharose, FPLC Suprose 12 HR and FPLC Mono-S. The molecular weights of PRIP 1 and PRIP 2 were 31,000 and 30,500, respectively. PRIP 2 was thermostabe and maintained its activity even after the incubation of the protein at 50℃ for 30 min. In a cell free in vitro translation system using rabbit reticulocyte lysate, protein synthesis was inhibited by the addition of PRIP 1 and PRIP 2. The IC_(50), of PRIP 1 and PRIP 2 were 0.82 nM and 0.79 nM, respectively. The comparison of N-terminal amino acid sequences of the PRIP 1 and PRIP 2 with known RIPs revealed that PRIP 1 shows sequence similarity with Luffin B from Luffa cylindrica and Trichokirin from Trichosanthes kirilowii Maximowicz and PRIP 2 has sequence similarity with Momordin Ⅱ and MAP 30 from Momordica charantia.
참비름 ( Amaranthus mangostanus ) 에서 항바이러스성 단백질 ( AAP29 ) 의 분리 및 특성
조강진(Kang Jin Cho),이승인(Seung In Yi),김영태(Yeong Tae Kim),황영수(Young Soo Hwang) 한국응용생명화학회 1995 Applied Biological Chemistry (Appl Biol Chem) Vol.38 No.6
An antiviral protein (AAP29) with ribosome-inactivating activity was purified and characterized from the leaves of the Amaranthus mangostanus. Purification was accomplished through crude extraction, ammonium sulfate precipitation, S-Sepharose chromatography, gel filtration, CM-Sepharose chromatography and Blue sepharose chromatography. This protein was about 29.2 kDa and strongly basic with the PI value between 9.0 and 9.6, indicating that AAP29 is similar to Type 1 RIP. The AAP29 showed high thermostability without activity toss even after 20 min at 50℃. In cell free system using rabbit reticulocyte lysate, AAP29 inhibited protein synthesis with an IC_(50), of 0.18 nM. This protein also reduced mosaic symptoms of cucumber mosaic virus (CMV) on tobacco leaves. The N-terminal amino acid sequences of the AAP29 are ADLTFTVTKDGTSQSYXTLXNXWRXW and shows no suquence similarity with any known RIPS.
조강진(Kang-Jin Cho),박해원(Hae-Won Park),김석우(Seok-Woo Kim),양현석(Hyun-Suk Yang),박영필(Young-Pil Park),박노철(No-Cheol Park) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
Biological swimmers, such as fish, have several good characteristics that the man-made underwater vehicles do not have. Many scientists calculated efficiency of the fish locomotion and found that it is more efficient than conventional underwater vehicle. And fishes are usually more maneuverable than the conventional underwater vehicles. Some fishes can make a whole turning with the diameter of one body length. Predatory fishes accelerate at 12Gs from stationary state. On the other hand, man-made underwater vehicles suffer from serious lag times in transient response, and their turning radius is larger than that of fishes. Recent underwater vehicle has problems of short battery life due to low efficiency, poor maneuvering ability, and restricted payloads due to large battery size. Therefore we developed a robot that mimics fish locomotion so that we could expect characteristics of fish locomotion from underwater vehicle.
온도 및 숙성기간이 마늘의 화학적 성분변화에 미치는 영향
조강진(Kang-Jin Cho),차지영(Ji-Young Cha),임주혁(Joo-Hyuk Yim),김재현(Jae-Hyun Kim) 한국식품영양과학회 2011 한국식품영양과학회지 Vol.40 No.1
생마늘을 온도별로 숙성시켰을 때 일어나는 물질의 생성과 변화에 대하여 조사한 결과, 고온숙성 마늘(흑마늘)의 열수 추출물에서 5-hydroxymethyl-2-furaldehyde(HMF)가 생성됨을 확인하였으며, HMF의 생성은 75℃에서는 7일 이후부터 급격히 증가하기 시작하였으며 35일차에는 13.09 ㎎/g dry weight까지 계속 증가하는 경향이었다. 그러나 60℃ 에서는 HMF의 생성은 거의 억제되었으며, 28일차부터 생성되긴 하였으나 35일차에도 0.35 ㎎/g dry weight로 그 양은 75℃ 조건에 비하여 매우 적었다. HMF의 생성은 당 화합물 중 과당(fructose)이 탈수되어 생성된다. 마늘 중 유리당의 생성량을 조사해 본 결과 75℃에서 숙성된 마늘에서는 7일 차부터 과당이 39.7%/dw 정도 생성되기 시작하여 14일차에 49.6%/dw 정도 생성되었으나, 이후 과당 함량이 감소되는 것을 볼 수 있는데 이는 생성된 과당이 HMF로 변환된 것으로 추정된다. 그리고 60℃에서는 21일차까지 과당의 생성량이 6.6%/dw 정도였으나 이후 28일 경에는 급속히 증가하여 35일경에는 44.6% 정도 생성되었다. 이로써 마늘에서 HMF의 생성은 마늘 중의 탄수화물이 고온(75℃)에서 과당으로 변환된 후 탈수반응을 거쳐 생성됨을 알 수 있었다. Some thermally processed foods have higher biological activities due to their various chemical changes during heat treatment. Especially, 5-hydroxymethylfurfural (HMF) is derived from dehydration of sugars and has beenidentified in processed garlic. The biological function of HMF have revealed as antisickling agent and thyrosinase inhibitor. This study was carried out to examine the formation of HMF and free sugars from the aged garlics when it is treated at 60 and 75℃ and different incubation periods from 7 to 35 days. HMF and free sugars from the hot-water extracts of aged garlics were analyzed with GC/MS, LC/MS, and HPLC. The amount of HMF was higher than at 75℃ and increasing incubation period. Among free sugars, the only fructose except glucose and sucrose was formed and converted to HMF at high temperature and long incubation period. However, fructose formed in low temperature during making of aged garlic was rarely converted to HMF. This result indicates that formation of HMF can be dependent on the temperature and incubation period for making aged garlic.
강위금,최주현,조강진,정연태,조무제,Kang, Ui-Gum,Choi, Ju-Hyeon,Cho, Kang-Jin,Jung, Yeun-Tae,Cho, Moo-Je 한국토양비료학회 1989 한국토양비료학회지 Vol.22 No.1
우수(優秀) 질소고정균주(窒素固定菌株)를 개발(開發)하여 척박(瘠薄)한 야산(野山) 개발지(開發地)에서 효율적(效率的)인 초지조성(草地造成)을 꾀하고자, 기존(旣存) 알팔파 목야지(牧野地)에서 분리(分離)한 근류균(根瘤菌)으로부터 기내(器內) 내산성(耐酸性) 균주(菌株) 탐색(探索)과 토양(土壤)에서 선발균주(選拔菌株)의 내산성(耐酸性) 발현(發現)을 조사(調査)한 결과(結果)는 다음과 같았다. 1. pH 5.0의 시험관배지(試驗管培地)에서 근류형성(根瘤形成)을 보인 균주(菌株)는 "YA03"과 "YA09"였으며 공생효과면(共生效果面)에서 "YA03"이 우수(優秀)하였다. 2. "YA03"균주(菌株) 접종(接種)에 의(依)한 알팔파 생육(生育)과 질소(窒素) 고정력(固定力)은 무비(無肥)에서 뿐만 아니라 요소(尿素) 1.25mM 농도(濃度)에서 타균주(他菌株)보다 좋았다. 3. 알팔파 생육(生育)에 대(對)한 질소수준별(窒素水準別) "YA03" 균주(菌株)의 알팔파 접종효과(接種效果)는 접종(接種)+요소(尿素) 1.25mM > 접종(接種)+요소(尿素) > 무시용(無施用) > 무접종(無接種)+요소(尿素) 2.5mM 순(順)으로서 근류균(根瘤菌) 접종(接種)과 함께 요소(尿素)를 여용(旅用)하는 것이 효과적(效果的)이었다. 4. pH 5.0인 산성척박지(酸性瘠薄地)에서 알팔파에 대(對)한 R. meliloti "YA03" 균주(菌株) 접종(接種)은 무접종(無接種)보다 320%, pH 7.5의 비옥(肥沃)한 토양(土壤)에서 무접종(無接種) 재배(栽培)보다는 31% 건물중(乾物重) 증가(增加)를 보이므로써 내산성(耐酸性)이 큰 R. meliloti 균주(菌株)로 "YA03"를 선발(選拔)하였다. A study was conducted to obtain acid tolerant and superior Rhizobium meliloti strain for alfalfa on hilly acid soils. With host plant, eight isolates of R, meliloti selected in the vicinity of Milyang were evaluated for their ability to establish symbiotic effectiveness in acidified tube culture medium and vermiculite pot with different urea levels. Among isolates "YA03" was characterized for the ability to manifest to acid tolerance in three different soils of which pH were 5.0, 6.0, and 7.5. The results obtained were summarized as follows: 1. Of eight isolates "YA03" and "YA09" performed nodule in the tube medium of pH5.0, and in the symbiotic effectiveness YA03 was superior to others. 2. Alfalfa growth and $N_2-fixing$ activity by the inoculation of "YA03" isolate were better than others at the level of urea 1.25mM as well as nonurea. 3. Application of urea with inoculation of "YA03" islate to alfalfa was one of the effective factors for symbiotic effectiveness. 4. In infertile soil of pH5.0 inoculation of R. meliloti "YA03" to alfalfa caused the increase of shoot dry matter of 320% as compared to the control, and the total amount of yield was 131% as much yield in moderate fertile soil of pH7.5. Finally R. meliloti "YA03" isolate was selected as an acid tolerant strain.