These proteins given per organism are involved in a DNA repair process;
double-strand break repair via homologous recombination (part of recombinational repair)( GO:0000724 ):

Saccharomyces cerevisiae( 5 entries )

KU70_YEAST
KU80_YEAST
SCC2_YEAST
SCC4_YEAST
YHO1_YEAST

Schizosaccharomyces pombe( 4 entries )

NBS1_SCHPO
NSE3_SCHPO
NSE4_SCHPO
SWI5_SCHPO