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GENE NAME |
DESCRIPTION | REFERENCE | EXPRESSED IN CELLS | NOTES
1-Norepinephrine (NE), Epinephrine (E) and Histamine have not been detected in C. elegans (Duerr J.S. et al., 1999) 2- Tyramine (ser-2) and dopamine (dop-1, dop-2) receptors are found in C. elegans (Tsalik E. et al., 2003) |
| ACETYLCHOLINE (ACh) | ||||
| cha-1 | choline acetyl transferase (ChAT) |
(C. elegans book II CSHL Press, 1997.Rand J.B. and Nonet M.L. Appendix II: Neurotransmitter assignments for specific neurons) Altun-Gultekin Z. F. et al. 2001
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2ALN's, 11AS's ,4CA's, 9DA's,
7DB's, 2HSN's(weak and variable staining), M1, 2M2's, M4( variable staining),
M5, MC (weak or nonexistent staining), 2PLN's, 4SAA's, 3SAB's, 2SDQ's,
4SIA's, 4SIB's, Note: there are approximately 100 cholinergic neurons in C. elegans, most of which are excitatory motor neurons. Ab staining |
unc-17 and cha-1 are in an operon and expressed in the same cells.
|
| unc-17 | vesicular acetylcholine transporter (VAChT) |
see cha-1 |
see cha-1 | note HSNs and VC4 and VC5 express both VAChT and VMAT (Duerr J. S. et al. 2001) |
| GAMMAAMINOBUTYRIC ACID (GABA) | ||||
| unc-25 | glutamic acid decarboxylase (GAD) |
|
19 D neurons of ventral cord (DD and VD classes), 4RME's, AVL, RIS, DVB unc-25::GFP reporter |
|
| unc-47 | vesicular GABA transporter (VGAT) | expression similar to unc-25 | see unc-25 | |
| GLUTAMATE | ||||
| eat-4 | vesicular glutamate transporter (VGluT) |
|
15 different anatomical types (ADA, ALM, ASH, ASK, AUA, and AVJ or AIN, AVM, FLP, IL1, LUA, OLL, OLQ, PLM, PVD, and PVR; 34 cells total) of extrapharyngeal neurons. In the pharynx: M3, NSM, possibly I5. eat-4::GFP reporter also eat-4::LacZ reporter |
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| MONOAMINES | ||||
| cat-1 | vesicular monoamine transporter: VMaT |
|
all Dopamine and 5-HT cells + others: ADE, PDE, CEP, NSM, HSN,VC4,VC5, ADF, RIH, AIM, RIC, CAN, an additional pair in lat ganglia (weak staining)+ some male-specific cells in VC and the tail. Ab staining |
VMaT transports monoamines into synaptic vesicles from cytosol; hence, has serotonin, DA, NE, tyramine, octopamine, histamine transport activity (exists in DA, 5-HT, octopamine, histamine, NE and E neurons) note: HSNs and VC4 and VC5 express both VAChT and VMaT (Duerr J. S. et al 2001). |
| DOPAMINE (DA) | ||||
| cat-2 | tyrosine hydroxylase: TH |
|
two ADE, two PDE, and four CEP neurons, three pairs of ray neurons (R5A, R7A, R9A) in the male tail, 4 socket cells of the male spicules cat-2::GFP reporter |
Dopamine biosynthesis rate limiting enzyme. Catalyzes the initial step in DA synthesis. |
| - | formaldehyde-induced fluorescence (FIF) | Sulston
J. et al. 1975 |
see cat-2 | dopamine expression |
| dat-1 | dopamine membrane transporter | Dopaminergic neurons: two ADE, two PDE, and four CEP neurons. | Transport of dopamine into synaptic vesicles. | |
| SEROTONIN (5-HT) | ||||
| tph-1 | tryptophan hydroxylase |
|
2NSM's, 2ADF's, 2HSN's(hermaphrodite-specific), 6CP's (male-specific),2 AIM's (rarely), RIH (rarely) tph-1::GFP reporter (see below for complete serotonergic neurons list) |
Note:cod-5 is not tph-1 and cod-5 animals are not serotonin-deficient (C. Loer-pers. comm). Note: Both tph-1 and bas-1 (AAAD) knockouts have residual serotonin-immunoreactivity that either represents serotonin coming from an unexpected source, or some serotonin relative molecule that may accumulate to sufficient levels in the mutants to be seen with the antibody. cat-4(e1141) has also been reported as having residual serotonin-immunoreactivity (C. Loer-pers. comm). Note: phenylalanine hydroxylase bas-2, is not expressed in neurons. |
| - | 5-HT |
C. elegans book II CSHL Press, 1997.Rand J.B. and Nonet M.L. Appendix II: Neurotransmitter assignments for specific neurons
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2 NSM's, RIH, 2 ADF's, 2 AIM's, CP1-6 (male), 2 R1B's (male), 2 R3B's (male), 2 R9B's (male), CA1-4 (male), 2 HSN's (herm), VC4 (herm), VC5 (herm),2 PHB's, I5, RPAG (=unpaired, Right Preanal Ganglion Neuron; PDC or PGA?; male-specific) Note:CA1-4; weak and unreliable
staining. histochemistry and immunostaining (anti-serotonin) |
5-HT functions in the worm: - pharyngeal pumping (increases) - egg-laying (increases) - foraging behavior - male-mating - locomotion (inhibits)
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| bas-1 | putative Dopa decarboxylase=L-aromatic amino acid decarboxylase (DDC=AAADC) | Loer C.M. et al. 1998 West Coast Worm Meeting abstract 161 | expression pattern not published | In serotonin biosynthesis; tryptophane is first hdroxylated by a tryptophane hydroxylase and then decarboxylated by an AAADC to yield serotonin. |
| cat-4 | putative GTP cyclohydrolase I (GCH) | Loer C.M.et al. 1998 West Coast Worm Meeting abstract 161 | expression pattern not published | GCH catalyzes the first step in biopterin cofactor synthesis. All AAAH enzymes (tryptophane hydroxylase in 5-HT synthesis; tyrosine hydroxylase in dopamine synthesis; phenylalanine hydroxylase in tyrosine synthesis/phenylalanine metabolism) require a biopterin cofactor to catalyze their respective hydroxylations. |