Shell Programming and Scripting

awk ' { if($2 !~ /^ *$/) { a=substr($0,length($1)+1,index($0,$NF)-length($NF)); b=$NF; } print $1, a, b } ' file

BDKRB2    Actions of Nitric Oxide in the Heart
KDR    
PDE3B    
PRKG2    
RYR2    
SLC7A1    
ACSL3    Adipocytokine signaling pathway
ACSL6    
PPARA    
PRKAA1    
PRKAG2    
PRKCQ    
RXRG    
STAT3    
ABAT    Alanine and aspartate metabolism
CAD    
DARS2    
GOT1    
NARS2    
CARS    Aminoacyl-tRNA biosynthesis
DARS    
DARS2    
EPRS    
FARS2    
FARSLB    
FLJ12118    
IARS2    
LARS    
LARS2    
NARS2    
QARS    
WARS    
YARS    
AGT    ACE 2 regulates heart function
AGTR1    
FASLG    Antigen Dependent B Cell Activation
IL4    
CD74    Antigen processing and presentation
HLA-DPA1    
HLA-DPB1    
KIR2DL2

BDKRB2     Actions of Nitric Oxide in the He Heart
KDR     Actions of Nitric Oxide in the He Heart
PDE3B     Actions of Nitric Oxide in the He Heart
PRKG2     Actions of Nitric Oxide in the He Heart
RYR2     Actions of Nitric Oxide in the He Heart
SLC7A1     Actions of Nitric Oxide in the He Heart
ACSL3     Adipocytokine signaling pathway
ACSL6     Adipocytokine signaling pathway
PPARA     Adipocytokine signaling pathway
PRKAA1     Adipocytokine signaling pathway
PRKAG2     Adipocytokine signaling pathway
PRKCQ     Adipocytokine signaling pathway
RXRG     Adipocytokine signaling pathway
STAT3     Adipocytokine signaling pathway
ABAT     Alanine and aspar metabolism
CAD     Alanine and aspar metabolism
DARS2     Alanine and aspar metabolism
GOT1     Alanine and aspar metabolism
NARS2     Alanine and aspar metabolism
CARS     Aminoacy biosynthesis
DARS     Aminoacy biosynthesis
DARS2     Aminoacy biosynthesis
EPRS     Aminoacy biosynthesis
FARS2     Aminoacy biosynthesis
FARSLB     Aminoacy biosynthesis
FLJ12118     Aminoacy biosynthesis
IARS2     Aminoacy biosynthesis
LARS     Aminoacy biosynthesis
LARS2     Aminoacy biosynthesis
NARS2     Aminoacy biosynthesis
QARS     Aminoacy biosynthesis
WARS     Aminoacy biosynthesis
YARS     Aminoacy biosynthesis
AGT     ACE 2 regulates he function
AGTR1     ACE 2 regulates he function
FASLG     Antigen Dependent B C Activation
IL4     Antigen Dependent B C Activation
CD74     Antigen processi presentation

awk '{if (NF>1) {str=substr($0,length($1)+1);print} else {sub("[ \t]*$","");print $0 str;}}' infile