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写一个根据NCBI Gene ID自动下载对应核酸序列的Pyth

写一个根据NCBI Gene ID自动下载对应核酸序列的Pyth

作者: BohanL | 来源:发表于2021-12-21 10:43 被阅读0次

    最近成为了硕导,克隆基因的基本工作就是获取对应的基因组序列,启动子,内含子等信息。
    为了降低学生学习获取核酸序列的难度,准备写个傻瓜脚本用来fetch基因组核酸序列文件。
    因为不想用selenium,因为还要开启浏览器和驱动所以用BeautifulSoup和request。

    # -*- coding: utf-8 -*-
    """
    Created on Tue Dec 21 11:05:15 2021
    
    @author: Bohan
    """
    
    # -*- coding: utf-8 -*-
    """
    Created on Mon Dec 20 17:18:07 2021
    
    @author: Bohan
    """
    import urllib
    import requests
    from bs4 import BeautifulSoup
    
    while True:
        print('该程序版权属于湖南农业大学农学院水稻生理生化团队所有,需要网络运行!')
        print("输入NCBI的基因ID,如LOC4342505,本程序不支持其他数据库ID")
        geneid=input("输入代码:")                                                       #输入NCBI的基因LOCID
        geneidtrans=(''.join(filter(str.isdigit,geneid)))                                 #去除所有非数字信息          
        genepage= "https://www.ncbi.nlm.nih.gov/gene/"
        geneurl=genepage+geneidtrans                                                      #合成基因页面url   
        print("基因网址:"+geneurl)                                                     #还是要有个Checkpoint   
        genepage=urllib.request.urlopen(geneurl)
        genepagecontents=genepage.read()
        
        soup1=BeautifulSoup(genepagecontents,"lxml")
        
        LOCNM=(soup1.find("span",{"class":"gn"})).string                                #定位基因名称
        LOCID0='LOC'+str((soup1.find("meta",{"name":"ncbi_uidlist"}))).split('content="')[1].split(" name=")[0]
        LOCID="LOC"+(''.join(filter(str.isdigit,LOCID0)))
        print("基因  ID:"+LOCID)                                                                    #还是要有个Checkpoint   
        print("基因名称:"+LOCNM)                                                                    #还是要有个Checkpoint   
        print("物    种:"+(soup1.find("em",{"class":"tax"})).string)                                #还是要有个Checkpoint   
        print("基因注释:"+(soup1.find("h1",{"id":"gene-name"})).text)                               #还是要有个Checkpoint   
        urlgenebank="https://www.ncbi.nlm.nih.gov"+soup1.find("a",{"title":"Nucleotide GenBank report"}).attrs['href']                      #获取基因信息页面对应的基因组核酸链接url 
        print("基因组序列genebank链接:"+urlgenebank)
        ncid1=urlgenebank.split("https://www.ncbi.nlm.nih.gov/nuccore/")[1].split("?report=genbank&from=")[0]                               #获取关键核酸ID 
        ncid2=urlgenebank.split("https://www.ncbi.nlm.nih.gov/nuccore/")[1].split("?report=genbank&from=")[1].split("&to=")[0]                  #获取核酸抬头位置 
        ncid3=urlgenebank.split("https://www.ncbi.nlm.nih.gov/nuccore/")[1].split("?report=genbank&from=")[1].split("&to=")[1].split("&strand=true")[0]               #获取核酸结束位置 
        ncid2pre=str(int(ncid2)-4000)               #计算基因前4000bp的位置 
        ncid3aft=str(int(ncid3)+4000)                #计算基因后4000bp的位置 
        gfurl="https://www.ncbi.nlm.nih.gov/nuccore/"+ncid1+"?report=genbank&from="+ncid2pre+"&to="+ncid3aft+"&strand=true"         #计算基因组前后4000bp链接 
        print("基因组前后4000bp链接:"+gfurl)
        gfpage=urllib.request.urlopen(gfurl)
        gfcontents=gfpage.read()
        soup2=BeautifulSoup(gfcontents,"lxml")
        valkeyword0=str(soup2.find("div",{"class":"seq gbff"})).split(" val=")[1].split(" virtualsequence=")[0]
        valkeyword=(''.join(filter(str.isdigit,valkeyword0))) 
                                                                                 #懒得解释了,大概就是获取NCBI核酸的母本ID
        genbankfileurl="https://www.ncbi.nlm.nih.gov/sviewer/viewer.cgi?tool=portal&save=file&log$=seqview&db=nuccore&report=gbwithparts&id="+valkeyword+"&from="+ncid2pre+"&to="+ncid3aft+"&strand=on&withparts=on"                                         #懒得解释了,大概就是获取NCBI核酸下载的真实链接
        print("genebank文件链接:"+genbankfileurl)
        
        filename="GF"+'-'+LOCID+"-"+LOCNM+'.gb'
        
        locateID=soup1.find("div",{"class":"genomerefseqs_slave"})
        SSS=locateID.find_all(name='a')
        mRNAID=(str(SSS[-5])).split('>')[1].split('<')[0]
        proteinID=(str(SSS[-4])).split('>')[1].split('<')[0]
        print("mRNA序列ID:"+mRNAID)
        print("蛋白质序列ID:"+proteinID)
        mRNAurl="https://www.ncbi.nlm.nih.gov/nuccore/"+mRNAID
        proteinurl="https://www.ncbi.nlm.nih.gov/protein/"+proteinID
        mrnapage=urllib.request.urlopen(mRNAurl)
        mrnacontents=mrnapage.read()
        soup3=BeautifulSoup(mrnacontents,"lxml")
        locateM=str(soup3.find("meta",{"name":"ncbi_uidlist"}))
        mrnacc=(''.join(filter(str.isdigit,locateM)))
    
        proteinpage=urllib.request.urlopen(proteinurl)
        proteincontents=proteinpage.read()
        soup4=BeautifulSoup(proteincontents,"lxml")
        locateP=str(soup4.find("meta",{"name":"ncbi_uidlist"}))
        proteinacc=(''.join(filter(str.isdigit,locateP)))
        proteinsequrl="https://www.ncbi.nlm.nih.gov/sviewer/viewer.cgi?tool=portal&save=file&log$=seqview&db=protein&report=gpwithparts&id="+proteinacc+"&extrafeat=undefined&withparts=on"
        mrnasequrl="https://www.ncbi.nlm.nih.gov/sviewer/viewer.cgi?tool=portal&save=file&log$=seqview&db=nuccore&report=gbwithparts&id="+mrnacc+"&withparts=on"
        print("正在下载基因组序列 "+filename+" 文件中")
        fileread = requests.get(genbankfileurl,allow_redirects=True)                            #下载基因组序列,不解释了   
        with open (filename, 'wb') as f:
            f.write(fileread.content)
            f.close
        
        print(filename+"已下载完成")
        mrnafilename="mRNA"+'-'+LOCID+"-"+mRNAID+'.gb'
        profilename="Protein"+'-'+LOCID+"-"+proteinID+'.gp'
        
        print("正在下载mRNA序列 "+mrnafilename+" 文件中")
        mfileread = requests.get(mrnasequrl,allow_redirects=True)                            #下载mRNA序列,不解释了   
        with open (mrnafilename, 'wb') as fm:
            fm.write(mfileread.content)
            fm.close
        
        print(mrnafilename+"已下载完成")
        
        print("正在下载蛋白序列 "+profilename+" 文件中")
        pfileread = requests.get( proteinsequrl,allow_redirects=True)                            #下载蛋白序列,不解释了   
        with open (profilename,'wb') as fp:
            fp.write(pfileread.content)
            fp.close
        
        print(profilename+"已下载完成")
        
        control=input("是否继续运行?请输入y/n \n")
        if control==('n'):
            break
    
    

    运行效果如下:

    输入代码:LOC4342505
    基因网址:https://www.ncbi.nlm.nih.gov/gene/4342505
    基因  ID:LOC4342505
    基因名称:GA20OX3
    物    种:Oryza sativa Japonica Group
    基因注释:GA20OX3 Gibberellin 20 oxidase 3 [ Oryza sativa Japonica Group (Japanese rice)
                   ] 
                   
    基因组序列genebank链接:https://www.ncbi.nlm.nih.gov/nuccore/NC_029262.1?report=genbank&from=3699596&to=3704922
    基因组前后4000bp链接:https://www.ncbi.nlm.nih.gov/nuccore/NC_029262.1?report=genbank&from=3695596&to=3708922&strand=true
    genebank文件链接:https://www.ncbi.nlm.nih.gov/sviewer/viewer.cgi?tool=portal&save=file&log$=seqview&db=nuccore&report=gbwithparts&id=996703426&from=3695596&to=3708922&strand=on&withparts=on
    mRNA序列ID:XM_026026987.1
    蛋白质序列ID:XP_025882772.1
    正在下载基因组序列 GF-LOC4342505-GA20OX3.gb 文件中
    GF-LOC4342505-GA20OX3.gb已下载完成
    正在下载mRNA序列 mRNA-LOC4342505-XM_026026987.1.gb 文件中
    mRNA-LOC4342505-XM_026026987.1.gb已下载完成
    正在下载蛋白序列 Protein-LOC4342505-XP_025882772.1.gp 文件中
    Protein-LOC4342505-XP_025882772.1.gp已下载完成
    
    是否继续运行?请输入y/n 
    
    

    已生成可运行的单个exe文件,请有需要的同学自行下载。
    如有转载请注明出处。
    链接:https://pan.baidu.com/s/1A8nJ81uq_obqKMEgONLh9Q
    提取码:0213

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          本文标题:写一个根据NCBI Gene ID自动下载对应核酸序列的Pyth

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