Translating RNA into Protein  

Problem

The 20 commonly occurring amino acids areabbreviated by using 20 letters from the English alphabet (all lettersexcept for B, J, O, U, X, and Z). Protein strings areconstructed from these 20 symbols. Henceforth, the term genetic string willincorporate protein strings along with DNA strings and RNA strings.

The RNA codon table dictatesthe details regarding the encoding of specific codons into the amino acidalphabet.

Given: An RNA string s correspondingto a strand of mRNA (of length at most 10 kbp).

Return: Theprotein string encoded by s.

Sample Dataset

AUGGCCAUGGCGCCCAGAACUGAGAUCAAUAGUACCCGUAUUAACGGGUGA

Sample Output

MAMAPRTEINSTRING

针对以上案例，我采用了以下代码解决：

#!/usr/bin/python

s='AUGGCCAUGGCGCCCAGAACUGAGAUCAAUAGUACCCGUAUUAACGGGUGA'

map = {"UUU":"F","UUC":"F", "UUA":"L","UUG":"L",

     "UCU":"S", "UCC":"S","UCA":"S", "UCG":"S",

     "UAU":"Y","UAC":"Y","UGU":"C","UGC":"C",

     "UGG":"W", "CUU":"L","CUC":"L", "CUA":"L",

     "CUG":"L", "CCU":"P","CCC":"P", "CCA":"P","CCG":"P",

     "CAU":"H", "CAC":"H","CAA":"Q", "CAG":"Q",

     "CGU":"R", "CGC":"R","CGA":"R", "CGG":"R",

     "AUU":"I", "AUC":"I","AUA":"I", "AUG":"M",

     "ACU":"T", "ACC":"T","ACA":"T", "ACG":"T",

     "AAU":"N", "AAC":"N","AAA":"K", "AAG":"K",

     "AGU":"S", "AGC":"S","AGA":"R", "AGG":"R",

     "GUU":"V", "GUC":"V","GUA":"V", "GUG":"V",

     "GCU":"A", "GCC":"A","GCA":"A", "GCG":"A",

     "GAU":"D", "GAC":"D","GAA":"E", "GAG":"E",

     "GGU":"G", "GGC":"G","GGA":"G", "GGG":"G",

     "UAA":"*","UAG":"*","UGA":"*"}

i=0

pro=''

for i in range(0, len(s), 3):

pro=pro+map[s[i:i+3]]

i+=1

print pro