| Nucleoside 2-deoxyribosyltransferase | Lactobacillus helveticus | Not Available | 4 | Details |
| Nucleoside 2-deoxyribosyltransferase | Trypanosoma brucei brucei (strain 927/4 GUTat10.1) | Not Available | 2 | Details |
| Nucleoside deoxyribosyltransferase | Lactobacillus leichmannii | Catalyzes the cleavage of the glycosidic bond of 2'-deoxyribonucleosides and the transfer of the deoxyribosyl moiety ... more | 1 | Details |
| Nucleoside diphosphate kinase A | Humans | Catalyzes the transfer of a gamma-phosphoryl group from a nucleoside triphosphate, mainly ATP, to a nucleoside diphos... more | 23 | Details |
| Nucleoside diphosphate kinase B | Humans | Catalyzes the transfer of a gamma-phosphoryl group from a nucleoside triphosphate, mainly ATP, to a nucleoside diphos... more | 6 | Details |
| Nucleoside diphosphate phosphatase ENTPD5 | Humans | Hydrolyzes nucleoside diphosphates with a preference for GDP, IDP and UDP compared to ADP and CDP. In the lumen of th... more | 1 | Details |
| Nucleoside diphosphokinase | Humans | A group of enzymes responsible for attaching phosphates to nucleosides. | 3 | Details |
| Nucleoside transporter 2 | Plasmodium falciparum (isolate 3D7) | Not Available | 1 | Details |
| Nucleoside-specific channel-forming protein tsx | Escherichia coli (strain K12) | Functions as a substrate-specific channel for nucleosides and deoxynucleosides. Has a greater affinity for deoxynucle... more | 1 | Details |
| Nucleotide triphosphate diphosphatase NUDT15 | Humans | Catalyzes the hydrolysis of nucleoside triphosphates including dGTP, dTTP, dCTP, their oxidized forms like 8-oxo-dGTP... more | 1 | Details |
| Nucleotide-binding oligomerization domain-containing protein 2 | Humans | Pattern recognition receptor (PRR) that detects bacterial peptidoglycan fragments and other danger signals and plays ... more | 4 | Details |
| O-acetyl-ADP-ribose deacetylase | Escherichia coli (strain K12) | Deacetylates O-acetyl-ADP ribose to yield ADP-ribose and free acetate. Down-regulates ribonuclease 3 (RNase III) acti... more | 1 | Details |
| O-GlcNAcase BT_4395 | Bacteroides thetaiotaomicron (strain ATCC 29148 / DSM 2079 / NCTC 10582 / E50 / VPI-5482) | Can hydrolyze the glycosidic link of O-GlcNAcylated proteins. Can use p-nitrophenyl-beta-GlcNAc and 4-methylumbellife... more | 3 | Details |
| O-GlcNAcase NagJ | Clostridium perfringens (strain 13 / Type A) | Binds carbohydrates. Capable of hydrolyzing the glycosidic link of O-GlcNAcylated proteins. Can bind and deglycosylat... more | 1 | Details |
| O-methyltransferase | Synechocystis sp. (strain PCC 6803 / Kazusa) | Not Available | 2 | Details |
| O-phosphoseryl-tRNA(Sec) selenium transferase | Humans | Converts O-phosphoseryl-tRNA(Sec) to selenocysteinyl-tRNA(Sec) required for selenoprotein biosynthesis | 1 | Details |
| o-succinylbenzoate synthase | Escherichia coli (strain K12) | Converts 2-succinyl-6-hydroxy-2,4-cyclohexadiene-1-carboxylate (SHCHC) to 2-succinylbenzoate (OSB). Does not show det... more | 2 | Details |
| o-succinylbenzoate synthase | Thermobifida fusca (strain YX) | Converts 2-succinyl-6-hydroxy-2,4-cyclohexadiene-1-carboxylate (SHCHC) to 2-succinylbenzoate (OSB). Does not show N-s... more | 1 | Details |
| Octanoyltransferase | Mycobacterium tuberculosis | Catalyzes the transfer of endogenously produced octanoic acid from octanoyl-acyl-carrier-protein onto the lipoyl doma... more | 1 | Details |
| Odorant binding protein | Anopheles gambiae | Not Available | 1 | Details |
| Odorant-binding protein 2a | Humans | Binds and transports small hydrophobic volatile molecules with a higher affinity for aldehydes and large fatty acids,... more | 1 | Details |
| Olfactory receptor 1D2 | Humans | Odorant receptor which may be involved in sperm chemotaxis. Bourgeonal is a strong chemoattractant for sperm in vitro... more | 1 | Details |
| Oligodendrocyte transcription factor 2 | Humans | Required for oligodendrocyte and motor neuron specification in the spinal cord, as well as for the development of som... more | 1 | Details |
| Oligopeptide ABC transporter, periplasmic oligopeptide-binding protein | Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099) | Not Available | 1 | Details |
| Omega-amidase NIT2 | Humans | Has omega-amidase activity. The role of omega-amidase is to remove potentially toxic intermediates by converting 2-ox... more | 1 | Details |