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Item type:Item, Crystal Structures of Bacillus cereus NCTU2 Chitinase Complexes with Chitooligomers Reveal Novel Substrate Binding for Catalysis A CHITINASE WITHOUT CHITIN BINDING AND INSERTION DOMAINS(2010-10-08) ;Hsieh, Yin-Cheng ;Wu, Yue-Jin ;Chiang, Tzu-Ying ;Kuo, Chueh-YuanShrestha, Keshab LalChitinases hydrolyze chitin, an insoluble linear polymer of N-acetyl-D-glucosamine (NAG)(n), into nutrient sources. Bacillus cereus NCTU2 chitinase (ChiNCTU2) predominantly produces chitobioses and belongs to glycoside hydrolase family 18. The crystal structure of wild-type ChiNCTU2 comprises only a catalytic domain, unlike other chitinases that are equipped with additional chitin binding and insertion domains to bind substrates into the active site. Lacking chitin binding and chitin insertion domains, ChiNCTU2 utilizes two dynamic loops (Gly-67-Thr-69 and Ile-106-Val-112) to interact with (NAG)(n), generating novel substrate binding and distortion for catalysis. Gln-109 is crucial for direct binding with substrates, leading to conformational changes of two loops with a maximum shift of similar to 4.6 angstrom along the binding cleft. The structures of E145Q, E145Q/Y227F, and E145G/Y227F mutants complexed with (NAG)(n) reveal (NAG)(2), (NAG)(2), and (NAG)(4) in the active site, respectively, implying various stages of reaction: before hydrolysis, E145G/Y227F with (NAG)(4); in an intermediate state, E145Q/Y227F with a boat-form NAG at the -1 subsite, -1-(NAG); after hydrolysis, E145Q with a chair form -1-(NAG). Several residues were confirmed to play catalytic roles: Glu-145 in cleavage of the glycosidic bond between -1-(NAG) and -1-(NAG); Tyr-227 in the conformational change of -1-(NAG); Asp-143 and Gln-225 in stabilizing the conformation of -1-(NAG). Additionally, Glu-190 acts in the process of product release, and Tyr-193 coordinates with water for catalysis. Residues Asp-143, E145Q, Glu190, and Tyr-193 exhibit multiple conformations for functions. The inhibitors zinc ions and cyclo-(L-His-L-Pro) are located at various positions and confirm the catalytic-site topology. Together with kinetics analyses of related mutants, the structures of ChiNCTU2 and its mutant complexes with (NAG)(n) provide new insights into its substrate binding and the mechanistic action.Item type:Item, Crystal Structures of Bacillus cereus NCTU2 Chitinase Complexes with Chitooligomers Reveal Novel Substrate Binding for Catalysis A CHITINASE WITHOUT CHITIN BINDING AND INSERTION DOMAINS(2010-10-08) ;Hsieh, Yin-Cheng ;Wu, Yue-Jin ;Chiang, Tzu-Ying ;Kuo, Chueh-YuanShrestha, Keshab LalChitinases hydrolyze chitin, an insoluble linear polymer of N-acetyl-D-glucosamine (NAG)(n), into nutrient sources. Bacillus cereus NCTU2 chitinase (ChiNCTU2) predominantly produces chitobioses and belongs to glycoside hydrolase family 18. The crystal structure of wild-type ChiNCTU2 comprises only a catalytic domain, unlike other chitinases that are equipped with additional chitin binding and insertion domains to bind substrates into the active site. Lacking chitin binding and chitin insertion domains, ChiNCTU2 utilizes two dynamic loops (Gly-67-Thr-69 and Ile-106-Val-112) to interact with (NAG)(n), generating novel substrate binding and distortion for catalysis. Gln-109 is crucial for direct binding with substrates, leading to conformational changes of two loops with a maximum shift of similar to 4.6 angstrom along the binding cleft. The structures of E145Q, E145Q/Y227F, and E145G/Y227F mutants complexed with (NAG)(n) reveal (NAG)(2), (NAG)(2), and (NAG)(4) in the active site, respectively, implying various stages of reaction: before hydrolysis, E145G/Y227F with (NAG)(4); in an intermediate state, E145Q/Y227F with a boat-form NAG at the -1 subsite, -1-(NAG); after hydrolysis, E145Q with a chair form -1-(NAG). Several residues were confirmed to play catalytic roles: Glu-145 in cleavage of the glycosidic bond between -1-(NAG) and -1-(NAG); Tyr-227 in the conformational change of -1-(NAG); Asp-143 and Gln-225 in stabilizing the conformation of -1-(NAG). Additionally, Glu-190 acts in the process of product release, and Tyr-193 coordinates with water for catalysis. Residues Asp-143, E145Q, Glu190, and Tyr-193 exhibit multiple conformations for functions. The inhibitors zinc ions and cyclo-(L-His-L-Pro) are located at various positions and confirm the catalytic-site topology. Together with kinetics analyses of related mutants, the structures of ChiNCTU2 and its mutant complexes with (NAG)(n) provide new insights into its substrate binding and the mechanistic action.Item type:Item, 用「試穿」認識世川(2010-10-10) ;蔡妙鈴 ;Department of Communication and Technology傳播與科技學系喜歡可以試穿是一種生活態度--勇於嘗試更多彩、更多樣的生活態度。 2010的夏天,來自台東的陳世川提著擺滿彩色T-shirt的旅行箱,在各個城市的誠品書店親力親為地宣傳他的首張個人專輯《喜歡可以試穿》,真誠地吟唱著他對音樂以及生活的熱愛。Item type:Item, 被中國政府扭轉的人生(2010-10-10) ;張瑜庭 ;Department of Communication and Technology傳播與科技學系來自德國的交換學生 David Demes,帶著簡單的行李與他的故事來到台灣。一個看似平凡的大學生,究竟藏了什麼樣的祕密呢?Item type:Item, 藝術屬於誰?(2010-10-10) ;劉芮菁 ;Department of Communication and Technology傳播與科技學系藝術是人類熱愛美學的證明,也是文化內部的高度成就。在古代,藝術屬於上層階級的生活內涵,只有吃得飽、穿得暖的人才有機會踏上追求美學的道路。而在民主化、大眾化的現代社會裡,各種各樣的音樂、繪畫、文學藝術也走進一般民眾的生活,豐富了次文化現象。然而,在大眾當道的社會下,通往藝術的道路仍有所限制,無形中,經濟能力似乎部分決定了接觸它的人們。Item type:Item, To wait or not to wait ?(2010-10-10) ;劉怡潔 ;Department of Communication and Technology傳播與科技學系想要在一天之內環遊世界,並不像想像中那麼困難。2010上海世博會,在今年五月熱鬧展開,吸引兩百多個國家與組織參展,每個國家使出渾身解數,想讓全世界的人認識他們,向全球展現自己的國力。但是,來自世界各地的遊客們,想要在人潮洶湧的世博園區內殺出一條血路,一窺心目中想參觀的場館可不是那麼容易,頂著四十度的高溫、看著前方永無止盡的排隊人龍,雖然心中想放棄的念頭不斷興起,遊客們卻仍發揮出野草一般的韌性,等待著……。Item type:Item, 傳統藝陣 創新風格(2010-10-10) ;王雅涵 ;Department of Communication and Technology傳播與科技學系台灣寺廟密度高,平均每鄉鎮擁有32座寺廟,這主要是歸因於早期移民以寺廟、宗廟為中心聚集,宗教和家族、地方緊密集合。因此,由迎神賽會所衍生出的種種廟會文化,久而久之也成為地方間比拚的重點。台灣話裡有一句「輸人不輸陣,輸陣就歹看面」,點出酬神活動的藝陣,在過去是等同於鄉里間重大的藝文交流活動。如今藝陣逐漸改良,並自成一門精緻的民俗藝術。Item type:Item, 不畏風霜的野薔薇 戴佩妮(2010-10-10) ;林映綺 ;Department of Communication and Technology傳播與科技學系出道十年的戴佩妮,在二零零九年舉辦了《野薔薇》演唱會,唱片公司在二零一零年順勢推出《野薔薇》演唱會專輯,不只收錄演唱會版本的曲目,也讓無法親臨現場的歌迷,可以聆聽戴佩妮的三首新歌,以及特別嘉賓-方炯鑌、蕭煌奇的歌曲獻唱,《野薔薇》專輯讓歌迷對戴佩妮的歌唱生涯做了一個最完整的回顧。Item type:Item, 中產階級新偶像《杜拉拉》(2010-10-10) ;李雪岩 ;Department of Communication and Technology傳播與科技學系《杜拉拉升職記》是個話題,原著本身是、翻拍多版本比較後更是,內地著名才女導演徐靜蕾不僅把它大銀幕化,還當個商品營銷得如此出色。號稱打造中國版「慾望都市」的徐導帶著《杜拉拉升職記》以一種喜劇的,輕鬆的,同時也有內涵的身份進入了茫茫的電影市場,並一度高居電影排行榜榜首。Item type:Item, 自信女人 《慾望城市2》(2010-10-10) ;陳蕾 ;Department of Communication and Technology傳播與科技學系大部分的女孩都渴望有段刻骨銘心的愛情,而在刻骨銘心的愛情之後,結婚生子似乎就是女孩們最後的目標了。從小時候開始我們就知道,王子與公主結婚後,會過著幸福快樂的生活,但是現實生活中,真的是如此嗎?這是連《慾望城市2》中的暢銷女作家凱莉,都無法預知的。Item type:Item, 范榮玉 「羽」眾不同(2010-10-10) ;彭婉婷 ;Department of Communication and Technology傳播與科技學系在羽球場上,有個小小身軀敏捷的移動著,踩著紮實的腳步,謹慎的應對每一顆球,儘管先前的練習導致右膝舊傷復發,也要咬著牙忍住疼痛,盡力在比賽中拿出最好的一面,絕不和對手妥協。看台上使勁幫中華台北加油的觀眾們,無不為之動容。他是2009年中華聽奧代表隊中年紀最小,年僅14歲的羽球選手,也是球壇的明日之星──范榮玉。Item type:Item, 用底片鎖住永恆 蘇哲賢(2010-10-10) ;徐子晴 ;Department of Communication and Technology傳播與科技學系當人生走到某一個階段時,庸庸碌碌與一成不變的生活開始壓得我們喘不過氣,在笑容逐漸僵硬的過程中,我們很容易忘記自己的理想與初衷。基於不忘初衷這樣的簡單的理由,讓蘇哲賢花了五年的時間拍出了《街舞狂潮》,並在宣傳時不斷強調「這不是一部關於街舞的電影,而是一部關於夢想的電影。」Item type:Item, Olivia Ong 溫暖的征服(2010-10-10) ;鄭家宜 ;Department of Communication and Technology傳播與科技學系想像在天氣和煦的午後,陽光從窗戶斜灑進來,啜飲一杯溫熱拿鐵,春天的暖風輕輕吹拂過耳朵,Olivia Ong的溫暖迷人嗓音能帶你深切體會這感受。自2008年王若琳出道開始,爵士樂和Bossa Nova在台灣流行樂壇中漸漸盛行,在熱潮尚未退去時,2010年的春天又誕生了一陣溫暖的歌聲。Item type:Item, 貓村侯硐 山城裡的喧鬧(2010-10-10) ;林宜芳 ;Department of Communication and Technology傳播與科技學系礦車沿著生鏽彎曲崩落的鐵軌駛入了歷史。在台北縣瑞芳鎮,侯硐村近來因村子裡數量眾多的貓重獲觀光客的青睞。走入山城,人手一台相機團團圍住慵懶的貓咪。昔日的礦坑、礦場、運煤橋矗立在一旁,像年邁的村民,對於大量湧入的觀光客只是靜靜的看著,處在同一個時空,卻像在不同的兩個世界。Item type:Item, 閃耀繁星 喧囂的寧靜(2010-10-10) ;陳文玲 ;Department of Communication and Technology傳播與科技學系來自加拿大,在Indie Pop中極具代表性的繁星樂團(Stars),如同其身處高緯度的冰冷,其作品曲調多呈冷調的氛圍,讓人彷彿身處在一片無垠的雪地裡,但此團並非帶來寒冷的孤寂,女主唱Amy Millan空靈卻溫暖的嗓音,像是來自遠方的呼喚,喚醒了冬天的暖陽,溫暖聽眾的心。Item type:Item, 3D電影 立體新視野(2010-10-10) ;李宜融 ;Department of Communication and Technology傳播與科技學系各類電影不斷推陳出新,近幾個月來3D電影更是賣座。3D電影給人的想像無限,觀眾們期待觀看電影時能有身歷其境的感官享受,畫面上的人物彷彿可以被接觸一般接近,飛濺的波璃碎片令人不自覺得用手向前遮擋,得克制住將手伸向前碰觸的渴望,這些,都是觀眾們對於3D電影的期待與想像。Item type:Item, 夜市人生 人生如戲(2010-10-10) ;黃萱如 ;Department of Communication and Technology傳播與科技學系燈火燦爛的夜市裡,總是充滿了吸引人的玩意兒。人頭鑽動的街道上,擦肩而過的人,表情無論是愉悅、亦或是苦悶,都有一股市井小民生活風情呈現出來的魅力。當你漫步在擁擠的夜市裡,耳中充斥著攤販們賣力的叫喊聲,眼睛瞟啊瞟,看到的都是眼花撩亂的商品,手中總不由自主多了幾串好吃道地的台灣小吃,是香噴噴的烤肉串呢?還是清涼的豆花冰?Item type:Item, Item type:Item, 詠春拳-下一波蛋塔效應?(2010-10-10) ;康甯 ;Department of Communication and Technology傳播與科技學系即使你跳不高,也總看過輕功;即使你不曾甩巴掌,也總看過鐵砂掌;即使你只會比手畫腳,也總看過無影腳。武術的魅力無人可擋,金庸為它痴狂、古龍為它傾倒,我們也為他們所創的世界著迷,久久無法自拔。 許多人因為《葉問》的關係去學詠春拳,然而,這股風潮是否會成為下一個蛋塔效應?Item type:Item, 地平線上 「同」聲奏悲歌(2010-10-10) ;陳雅甄 ;Department of Communication and Technology傳播與科技學系日本的同人樂團「Sound Horizon」(以下簡稱SH)被譽為是同人音樂界的奇蹟,近年來隨著樂團專輯一張張地發行,從2004年九月第一張商業製作CD《Elysion~往樂園的前奏曲》(原名:Elysion ~楽園への前奏曲~),到今年2010年六月推出的《イドへ至る森へ至るイド》,短短數年,自稱是「幻想樂團」的SH人氣已逐漸由日本當地擴展到海外的中文社群,支持者的數量與日俱增,在同人樂史上創下輝煌的佳績。