| 5 | 1/1 | 返回列表 |
| 查看: 704 | 回復(fù): 2 | |||
| 本帖產(chǎn)生 1 個 翻譯EPI ,點擊這里進行查看 | |||
| 當前只顯示滿足指定條件的回帖,點擊這里查看本話題的所有回帖 | |||
[交流]
翻譯急用,非常感謝你的幫助!。!
|
|||
|
Expression of a Bacillus Phytase C Gene in Pichia pastoris and Properties of the Recombinant Enzyme The cloning and expression of a native gene encoding a Bacillus subtilis phytase using Pichia pastoris as the host is described. In addition, the influence of N-glycosylation on the biochemical properties of the B. subtilis phytase, the influence of pH on the thermostability of the recombinant and native B. subtilis phytases, and the resistance of both phytases to shrimp digestive enzymes and porcine trypsin are also described. After 48 h of methanol induction in shake flasks, a selected recombinant strain produced and secreted 0.82 U/ml (71mg/liter) recombinant phytase. This phytase was N-glycosylated, had a molecular mass of 39 kDa after N-deglycosylation, exhibited activity within a pH range of 2.5 to 9 and at temperatures of 25 to 70°C, had high residual activity (85% 2%) after 10 min of heat treatment at 80°C and pH 5.5 in the presence of 5 mM CaCl2, and was resistant to shrimp digestive enzymes and porcine trypsin. Although the recombinant Bacillus phytase had pH and temperature activity profiles that were similar to those of the corresponding nonglycosylated native phytase, the thermal stabilities of the recombinant and native phytases were different, although both were calcium concentration and pH dependent |
» 搶金幣啦!回帖就可以得到:
+1/53
+1/51
+2/48
+1/39
+1/35
+2/34
+1/32
+1/18
+1/16
+2/16
+1/11
+1/6
+1/4
+1/4
+1/4
+1/4
+1/2
+1/2
+1/1
+1/1
| 本文描述了以畢赤酵母為宿主的枯草桿菌植酸酶基因克隆和表達。同時本文還描述了N-糖基化對枯草桿菌植酸酶生化性質(zhì)的影響,pH值對天然枯草桿菌植酸酶和重組酶的影響,以及兩種酶對抗消化酶和豬胰蛋白酶的活性。在搖瓶中浸泡甲醇48 h后,挑選出的重組菌種產(chǎn)生并分泌出了0.82 U/ml(71mg/升)的重組酶。這種植酸酶是N-糖基化的,N-去糖基化后的分子量為39 kDa,在pH2.5 到 9和25 到70°C下表現(xiàn)出了活性,在80°C下10分鐘、pH 5.5和5 mM CaCl2存在下的活性為85% 2%,且對消化酶和豬胰蛋白酶是有對抗作用的。盡管重組枯草桿菌植酸酶在相同pH值和溫度下的未糖基化的天然植酸酶相似,但是熱穩(wěn)定性并不相同,盡管都為鈣濃度和pH依賴性。 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 一志愿北京化工大學材料與化工(085600)296求調(diào)劑 +17 | 稻妻小編 2026-03-26 | 17/850 |
|
|---|---|---|---|---|
|
[基金申請] 面上5B能上會嗎? +4 | redcom 2026-03-29 | 4/200 |
|
|
[考研] 334分 一志愿武理 材料求調(diào)劑 +7 | 李李不服輸 2026-03-26 | 7/350 |
|
|
[考研] 0856材料化工調(diào)劑 總分330 +14 | zhubinhao 2026-03-27 | 14/700 |
|
|
[考研] 數(shù)一英一271專碩(085401)求調(diào)劑,可跨 +7 | 前行必有光 2026-03-28 | 8/400 |
|
|
[考研] 學碩274求調(diào)劑 +9 | Li李魚 2026-03-26 | 9/450 |
|
|
[考研] 346求調(diào)劑 一志愿070303有機化學 +3 | 蘿卜燉青菜 2026-03-28 | 3/150 |
|
|
[考研] 291求調(diào)劑 +15 | hhhhxn.. 2026-03-23 | 21/1050 |
|
|
[考研] 一志愿南昌大學324求調(diào)劑 +7 | hanamiko 2026-03-27 | 7/350 |
|
|
[考研] 085405 考的11408求各位老師帶走 +3 | Qiu學ing 2026-03-28 | 3/150 |
|
|
[考研] 0703化學求調(diào)劑,各位老師看看我。! +5 | 祁祺祺 2026-03-25 | 5/250 |
|
|
[有機交流]
高溫高壓反應(yīng)求助
10+4
|
chibby 2026-03-25 | 4/200 |
|
|
[考研] 考研調(diào)劑 +4 | Sanmu-124 2026-03-26 | 4/200 |
|
|
[考研] 322求調(diào)劑 +4 | 我真的很想學習 2026-03-23 | 4/200 |
|
|
[考研] 359求調(diào)劑 +4 | 王了個楠 2026-03-25 | 4/200 |
|
|
[考研] 327求調(diào)劑 +7 | prayer13 2026-03-23 | 7/350 |
|
|
[考研]
|
平樂樂樂 2026-03-26 | 4/200 |
|
|
[考研] 085601求調(diào)劑總分293英一數(shù)二 +4 | 鋼鐵大炮 2026-03-24 | 4/200 |
|
|
[考研] 347求調(diào)劑 +4 | L when 2026-03-25 | 4/200 |
|
|
[考研] 一志愿國科過程所081700,274求調(diào)劑 +3 | 三水研0水立方 2026-03-23 | 3/150 |
|