SGD GO download

Could you look into GO slim mapping files? 

https://downloads.yeastgenome.org/curation/literature/

go_slim_mapping.tab

Yeast ORF Name table from FASTA headers

$ grep ">" sce.orf.faa > /tmp/sce.orf.name.txt

$ cut -f1-2 -d ' ' sce.orf.name.txt > tmp.txt 

Byte:tmp hqin$ cut -f1-2 -d ' ' sce.orf.name.txt > tmp.txt 

Byte:tmp hqin$ head tmp.txt 

>YAL001C TFC3

>YAL002W VPS8

>YAL003W EFB1

>YAL005C SSA1

>YAL007C ERP2

>YAL008W FUN14

>YAL009W SPO7

>YAL010C MDM10

>YAL011W SWC3

>YAL012W CYS3

Byte:tmp hqin$ cut -f2 -d '>' tmp.txt > ORF_name.txt

Byte:tmp hqin$ head ORF_name.txt 

YAL001C TFC3

YAL002W VPS8

YAL003W EFB1

YAL005C SSA1

YAL007C ERP2

YAL008W FUN14

YAL009W SPO7

YAL010C MDM10

YAL011W SWC3

YAL012W CYS3

I then use TextWrangler and removed two single quote ' 

([\w-]+)\s([\w-]+) replaced with \1\t\2

The generated file is saved as "SceORF_name.csv"