Table 1

Hydrolases identified in tear fluid

Hydrolase activity
Gene symbol
Biological process

Leukotriene A-4 hydrolase
LTA4H
1,2
Matrix metalloproteinase 8*
MMP8
1,3
Matrix metalloproteinase 9*
MMP9
1,3
Myeloblastin
PRTN3
3
Apolipoprotein B
APOBEC3C
4
Azurocidin
AZU1
4
Dipeptidylpeptidase IV
DPP4
4
Leukocyte elastase*
ELA2
4
Haptoglobin*
HP
4
Lactotransferrin*
LTF
4,5
Lysozyme C*
LYZ
4
Eosinophil cationic protein*
RNASE3
4,9
Adipocyte-derived leucine aminopeptidase
ARTS-1
5
Zinc-alpha-2-glycoprotein*
AZGP1
5
Complement factor B
BF
5
Ubiquitin thiolesterase protein
OTUB1
5
Palmitoyl-protein thioesterase 1
PPT1
6
Plasminogen*
PLG
7
Aminopeptidase N
ANPEP
8
Acid phosphatase, prostate
ACPP
10
Chitinase 3-like protein 2
CHI3L2
11
Cytosolic nonspecific dipeptidase
CNDP2
1
Cathepsin B*
CTSB
1
Cathepsin D
CTSD
1
Cathepsin G
CTSG
1
Cathepsin Z
CTSZ
1
Prostasin
PRSS8
1
Aminopeptidase B
RNPEP
1
Tissue alpha-L-fucosidase
FUCA1
12
Beta-mannosidase*
MANBA
13
Alpha-N-acetylglucosaminidase*
NAGLU
12
Neuraminidase
NEU1
12

*The protein has already described in the tear fluid. The protein is classified as an extracellular protein. 1, Proteolysis; 2, inflammatory response; 3, extracellular matrix degradation; 4, defense response; 5, immune response; 6, visual perception; 7, blood coagulation; 8, angiogenesis; 9, nucleotide metabolism; 10, regulation of cell proliferation; 11, chitin catabolism; 12, carbohydrate metabolism; 13, protein modification; 14, central nervous system development; 15, signal transduction.

de Souza et al. Genome Biology 2006 7:R72   doi:10.1186/gb-2006-7-8-r72