#! perl -sw
use strict;
use Inline::Files;

my %reps = map{ split "\t", $_, 2 } <REPLACEMENTS>;
chomp %reps;

while( <DATAFILE> ) {
    my @items = split "\t", $_;
    $_ = $reps{ $_ } // $_ for @items;
    print join "\t", @items;
}


__REPLACEMENTS__
Aspergillus_clavatus_1	XP_001276684.1 pectate lyase, putative [Aspergillus clavatus NRRL 1]
Aspergillus_fumigatus_2	XP_001276694.1 conserved hypothetical protein [Aspergillus fumigatus NRRL 1]
Aspergillus_flavus_3	XP_001276726.1 tyrosinase central domain protein [Aspergillus flavus NRRL 1]
Aspergillus_terreus_4	XP_001276738.1 endoglucanase, putative [Aspergillus terreus NRRL 1]
__DATAFILE__
Aspergillus_clavatus_1	Aspergillus_flavus_198  Aspergillus_terreus_166 Aspergillus_fumigatus_2
Aspergillus_clavatus_1	Aspergillus_flavus_3    Aspergillus_terreus_4   Aspergillus_fumigatus_2
Aspergillus_clavatus_3	Aspergillus_flavus_198  Aspergillus_terreu_166  Aspergillus_fumigatus_16


##</code><code>##

C:\test>1157643
XP_001276684.1 pectate lyase, putative [Aspergillus clavatus NRRL 1]    Aspergillus_flavus_198  Aspergillus_terreus_166 Aspergillus_fumigatus_2
XP_001276684.1 pectate lyase, putative [Aspergillus clavatus NRRL 1]    Aspergillus_flavus_3    Aspergillus_terreus_4   Aspergillus_fumigatus_2
Aspergillus_clavatus_3  Aspergillus_flavus_198  Aspergillus_terreu_166  Aspergillus_fumigatus_16