Most easy way to find the Entrez Gene ID using Gene Symbol is NCBI gene database. This database is accessible through e-utils.
Now next question arise how to get species specific gene list using provided gene symbols in batch. ??? When I am not sure about Gene symbol is standard then data curation become necessary.
With this thought wrote a perl script ( getGene_Details_from_Gene_Symbols.pl ) which is capable of mining Gene Details Page for Standard Gene Symbol or Alias or Gene Description and also provides rang 1,2 and 3 respectively.
There are three Output files : -
Gene_Desc_1_2.txt :- contains gene details of rank 1 and 2 i.e. Standard Symbol and Alias.
Gene_Desc_3.txt :- contains gene details of rank 3 i.e. Gene Description.
GenSym-ID_Summary.txt :- Summary of Gene Symbol - Entrez Gene ID and Rank
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