We have cloned and characterized the FUN12 gene which is found on chro
mosome I of Saccharomyces cerevisiae. The complete nucleotide (nt) seq
uence of the cDNA and the genomic clones shows that FUN12 is expressed
as a 3.7-kb message and should encode a 97 kDa-protein. Immunoprecipi
tations using antipeptide antibodies showed that the cells contain a F
un12p of this size. The databases contain no nt sequences that are hom
ologous to FUN12 and no protein homologous to Fun12p. Gene disruption
experiments showed that FUN12 is an essential gene.