Rosalind将RNA转化为蛋白质问题

Question

你好，我试着从ROSALIND做这个问题，但是当我把rna序列(AUGGCCAUGGCGCCCAGAACUGAGAUCAAUAGUACCCGUAUUAACGGGUGA)放在示例中时，它给了我错误的输出“M”、“M”、“N”、“I”，而不是建议的"MAMAPRTEINSTRING".I试图修改代码，但它仍然没有给我想要的输出。如果有人可以的话，我希望得到一些帮助。

这是我的代码：

**dna_seq = input("PLace your RNA sequence here(it must not exceed 1kb):")
list = []

for x in range (0,len(dna_seq),3):
        if dna_seq[x:x+3] == "AUG":
                list.append("M")
        elif dna_seq[x:x+3] == ("UUU" or "UUC"):
                list.append("F") 
        elif dna_seq[x:x+3] == ("UUA" or "UUG" or "CUU" or "CUC" or "CUA"  or "CUG"):
                list.append("L")  
        elif dna_seq[x:x+3] == ("AUU" or "AUC" or "AUA"):
                list.append("I")
        elif dna_seq[x:x+3] == ("GUA" or "GUG" or "GUC" or "GUU"):
                list.append("V")
        elif dna_seq[x:x+3] == ("UCA" or "UCU" or "UCG" or "UCC"):
                list.append("S")
        elif dna_seq[x:x+3] == ("CCU" or "CCA" or "CCC" or "CCG" or "AGU" or "AGC"):
                list.append("P")
        elif dna_seq[x:x+3] == ("ACA" or "ACU" or "ACG" or "ACC"):
                list.append("T")
        elif dna_seq[x:x+3] == ("GCU" or "GCA" or "GCG" or "GCC"):
                list.append("A")   
        elif dna_seq[x:x+3] == ("UAU" or "UAC"):
                list.append("Y")
        elif dna_seq[x:x+3] == ("UAA" or "UAG" or "UGA"):
                list.append("STOP")
        elif dna_seq[x:x+3] == ("CAU" or "CAC"):
                list.append("H")
        elif dna_seq[x:x+3] == ("CAA" or "CAG"):
                list.append("Q")
        elif dna_seq[x:x+3] == ("AAU" or"AAC"):
                list.append("N")
        elif dna_seq[x:x+3] == ("AAA" or "AAG"):
                list.append("K")
        elif dna_seq[x:x+3] == ("GAU" or "GAC"):
                list.append("D")
        elif dna_seq[x:x+3] == ("GAA" or "GAG"):
                list.append("E")
        elif dna_seq[x:x+3] == ("UGU" or "UGC"):
                list.append("C")
        elif dna_seq[x:x+3] == ("UGG"):
                list.append("W")
        elif dna_seq[x:x+3] == ("CGA" or "CGG" or "CGC" or "CGU" or "AGA" or "AGG"):
                list.append("R")
        elif dna_seq[x:x+3] == ("GGU" or "GGC" or "GGA" or "GGG"):
                list.append("G")
        
print(list)** 

耽误您时间，实在对不起!

Answer 1

声明("CAU“或"CAC")评价为”CAU“：

>>> ("CAU" or "CAC")
'CAU'

因此，您的elif语句将只检查列表中的第一个密码子。您可以通过将语句重写为以下格式来解决此问题：

elif dna_seq[x:x+3] == "CAU" or dna_seq[x:x+3] "CAC":

但更好的做法是制作一本字典，其中你的密码子是键，值是对应于密码子的氨基酸。然后，通过从字典中获取密码子的值来构建蛋白质序列，并将其添加到您的列表中。

最后，不要在python列表中指定变量。它覆盖内置的函数列表()。