Homologs of MPMX20_03719 from Enterobacter sp. TBS_079
Acetyl-CoA acetyltransferase
SEED: 3-ketoacyl-CoA thiolase (EC 2.3.1.16) @ Acetyl-CoA acetyltransferase (EC 2.3.1.9)
KEGG: acetyl-CoA C-acetyltransferase 
Top 100 hits from BLASTp (E < 0.01)
Or try PaperBLAST, fast.genomics, the ENIGMA genome browser, or the comparative fitness browser