Table 5.

Proteins belonged to nitrogen metabolism identified in the composting metaproteome

Protein name	Accession	Functional group	Species	Taxonomy
Lon protease 2	P36774	Protein degradation	Myxococcus xanthus	Deltaproteobacteria
Lon protease homolog 2, peroxisomal	Q6CWS4	Protein degradation	Kluyveromyces lactis	Saccharomycetes
Probable M18 family aminopeptidase 2	A4VJG1	Protein degradation	Pseudomonas stutzeri	Gammaproteobacteria
Probable cytosol aminopeptidase	Q0SHL0	Protein degradation	Rhodococcus jostii	Actinobacteria
ATP-dependent zinc metalloprotease FtsH	Q03Z46	Protein degradation	Leuconostoc mesenteroides	Bacilli; Lactobacillales
ATP-dependent Clp protease ATP-binding subunit ClpX	B2JGL6	Protein degradation	Burkholderia phymatum	Betaproteobacteria
ATP-dependent protease ATPase subunit HslU	Q73NE3	Protein degradation	Treponema denticola	Spirochaetes
Urease subunit alpha	B1JR71	Urea degradation	Yersinia pseudotuberculosis	Gammaproteobacteria
[Protein-PII] uridylyltransferase	Q3J5H6	Nitrogen fixation	Rhodobacter sphaeroides	Alphaproteobacteria
Nitrous-oxide reductase	P19573	Denitrification	Pseudomonas stutzeri	Gammaproteobacteria