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    --- title: 'Hsulab923_Tutorial 2024 version' disqus: hackmd --- Hsulab923_Tutorial 2023 version === 參考檔案: "G:\我的雲端硬碟\D923_lab\Hsulab完全手冊\2021 Version\HsuLab實驗室學習流程 此為20210427版本.pdf" ## 常用工具簡介 | Tools | Introduction | | ---------------------------- |:----------------------- | | Job Retriever | 輸入 Job ID ,可以回朔以前的工作,僅保留一個禮拜內的紀錄! | | Force Field Converter | 轉成charmm36 force field,常搭配下一個選項一起用 | | PDB Reader | 可直接讀pdb檔並轉成charmm36 force field,常搭配上一個選項一起用 | | Ligand Reader&Modeler | 把ligand轉成charmm36 force field,最多可讀400 atoms | | Membrane Builder | 放膜好工具,實驗室最常用來建系統工具 | # CHARMM_GUI login If you are a total beginner to this, start here! linker:dizzy:: https://www.charmm-gui.org/ Click "Login" ![](https://i.imgur.com/zOgS1fd.png) 1. 此為首頁,如果您是第一次使用此網站,請用學校信箱註冊帳號,並等其審核員通過認證,方可使用後續操作。此步驟可能會花一些時間等待。 2. 可以看到此網站左側有提供網站資訊(About us)、常見問答(Q&A)示範影片(video demo)以及更新日至(update log),提供大家去更加了解力場版本及版本更動。本實驗室最常使用選項為" Input Generator " 3. Click 左邊操作欄位的 "Input Generator" ![](https://i.imgur.com/z13mGoL.png) 1. 右上角可以點選 User profile ![](https://i.imgur.com/U5fhFsb.png) 1. 點選 User profile,可以回朔一個禮拜內的job。 # CHARMM_GUI Input generator --- > 本實驗室常用選項為 *Job Retriever(工作回朔) *ForceField Converter(常配合 PDB Reader & Manipulator) *Member builder(中的Bilayer Builder) ## Membrance Builder-- Bilayer Builder ![](https://i.imgur.com/zdeLyJn.png) >網站右上角有提供教程,點選"Tutorial"後,會跳出一視窗,可以選擇需要的教程觀看。 >需要請您注意 Please note that: 中的GROMACS的相關建議。 2. 網頁往下滾動,即可上傳您的蛋白質。 3. 上傳網站前,建議先將蛋白質在MOE做結構修正及能量最小化,把X氨基酸刪掉。 4. Membrane builder僅限蛋白質,配體需分開轉檔。 ### 上傳蛋白質 ![](https://i.imgur.com/qRvJZUk.png) ### 確認序列 ![](https://i.imgur.com/lUVhQXC.png) ### 確認雙硫鍵 ![](https://i.imgur.com/7e7iiwU.png) ### 放膜 ![](https://i.imgur.com/MXAVglJ.png) >PPM選項是方便且快速的自動放膜網站(https://opm.phar.umich.edu/ppm_server),大家可以去了結放膜方式。 ### 設置膜 ![](https://i.imgur.com/aUQn4mi.png) >此步驟要做的事情很多 * 確認放膜位置 * 設置膜的種類(POPC) * 設置膜的比率(1:1) * 設置膜的大小(注意單位,比Gromacs大10倍) * 透過點選Show the system info確認膜是否會太小 * 小建議,建議只有膜的受體(例如:Dopamine receptor的大小)設100,有G protein設120 ### 加離子 ![](https://i.imgur.com/u8r33ns.png) ### Step 4 ![](https://i.imgur.com/J63Ze1V.png) ### 選擇CHARMM36力場 ![](https://i.imgur.com/5z59Fsa.png) ### 下載壓縮檔 ![](https://i.imgur.com/A7NpUUY.png) ### 解壓所檔 ![](https://i.imgur.com/5HGoh3y.png) >已結束蛋白質轉檔,接下來要處理配體轉檔 ## Ligand Converter --- 1. 將Step5_input.pdb,用UE打開,並刪掉水分子(TIP3P),另存新檔only_R_delpop.pdb。 ![](https://i.imgur.com/58fHp4J.png) 2. MOE打開 only_R_delpop.pdb和Ligand,進行Induced-fit docking。 3. Docking完後,只保留Ligand,存檔LIG.pdb和LIG.sdf檔案。 4. 上傳至CHARMM_GUI -> Inpur generator -> Ligand Reader & Modeler ![](https://i.imgur.com/qi3rjKT.png) 5. Next Step ![](https://i.imgur.com/w7vrO3t.png) 6. 解壓所檔 ![](https://i.imgur.com/6Qv12A7.png) >處理完配體轉檔,接下來要合併配體和蛋白質 >須先進行 pdb2gmx 指令,將蛋白質先行轉成GMX格式,再合併 ### Some Error - 如沒有Error,請跳到CHARMM36 to GROMACS 章節 >如果您發現轉完檔之後,沒有 ligand.itp 和charmm36.itp,可以用SwissParam > SwissParam: https://www.swissparam.ch/ 1. 將CHARMM_GUI轉檔之後的壓縮檔中的mol2複製至您的資料夾。 2. 再將mol2上傳至SwissParam ![](https://i.imgur.com/TNmGEZq.png) 3. 解壓所檔,複製 .itp ![](https://i.imgur.com/MWfwbmt.png) ## CHARMM36 to GROMACS --- >參考檔案: "G:\我的雲端硬碟\D923_lab\Hsulab完全手冊\2021 Version\HsuLab實驗室學習流程 此為20210427版本.pdf" 1. pdb2gmx 指令 ``` gmx_pdb2gmx -f _delpop.pdb -o _g.pdb -p topo.top -ter ``` 2. 不需要加入-ignh > 水分子選擇TIP3P CHARMM-modified... > N端選擇NH3+ > C端選擇 COO- 3. 修改TOP file ![](https://i.imgur.com/fM4UMT3.png) >加入.itp檔 4. 合併蛋白質.pdb和ligandrm.pdb * 跟之前的立場相比,CHARMM需多做一步,因為在LIG轉檔時,CHARMM_GUI會更改座標軸,所以要將座標軸改回去。 * UE打開docking.pdb和ligandrm.pdb,利用docking.pdb,找到LIG的座標軸,複製,並貼上ligandrm.pdb。 ![](https://i.imgur.com/hBKvn4T.png) * 合併蛋白質.pdb和ligandrm.pdb * 將配體貼上蛋白質.pdb。 * 對齊,順原子數。 * 用MOE打開,確認分子沒有碎片化,如果有請一個一個原子確認位置,並修正 ![](https://i.imgur.com/cHyWDNB.png) ---- ### 後續建系統方式如先前教程一樣 1. 加邊界 (Z軸建議長一點) ``` gmx_editconf -f (.pdb) -o (.pdb) -box -center ``` 2. 加水 ``` gmx_solvate -cp (.pdb) -cs spc216.gro -o (.pdb) -p (.top) ``` 4. 加離子 ``` gmx_grompp -f _CHARMM.mdp -c (.pdb) -p (.pdb) -o (.tpr) ``` ``` gmx_genion -s (.tpr) -conc 0.15 -neutral -o (.pdb) -p (.top) -pname SOD -nname CLA ``` 6. 能量最小化 ``` 拿 CHARMM 的 Script,檔名有寫 _CHARMM ``` 7. PR ``` 拿 CHARMM 的 Script,檔名有寫 _CHARMM ``` 8. MD RUN ``` 拿 CHARMM 的 Script,檔名有寫 _CHARMM ``` 9. 完成 # CHARMM 相關資料 1. CHARMM_GUI Twitter: https://twitter.com/CharmmGui 2. CHARMM Force Field Files: http://mackerell.umaryland.edu/charmm_ff.shtml#gromacs 3. CHARMM36 forcefield mdp file parameters suggested by Gromacs: https://manual.gromacs.org/current/user-guide/force-fields.html

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