N(alpha)-acyl-glutamine aminoacylase

UniProtKB accession:  Q8GGD4

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Hydrolyzes odorless N-alpha-acyl-L-glutamine conjugates of short- and medium-chain fatty acids, releasing human axillary malodor compounds (PubMed:12468539, PubMed:18492161, PubMed:17193210). The enzyme is highly specific for the glutamine residue but has a low specificity for the acyl part of the substrate (PubMed:12468539, PubMed:18492161, PubMed:17193210). The two most common products are 3-methyl-2-hexenoic acid (3M2H) and 3-hydroxy-3-methyl-hexanoic acid (HMHA), which are produced from the odorless precursors N-alpha-3-methyl-2-hexenoyl-L-glutamine (3M2H-Gln) and N-alpha-3-hydroxy-3-methylhexanoyl-L-glutamine (HMHA-Gln) (PubMed:12468539, PubMed:18492161, PubMed:17193210). In addition, over 28 different carboxylic acids contributing to human body odor are released by this enzyme from odorless axilla secretions, including several aliphatic 3-hydroxy acids with 4-Me branches, 3,4-unsaturated, 4-Et-branched aliphatic acids, and a variety of degradation products of amino acids (PubMed:17193210).