title: Existence of four acetylcholinesterase genes in the nematodes Caenorhabditis elegans and Caenorhabditis briggsae.
abstract: Three genes, ace-1, ace-2 and ace-3, respectively located on chromosomes X, I and II, were reported to encode acetylcholinesterases (AChEs) of classes A, B and C in the nematode Caenorhabditis elegans. We have previously cloned and sequenced ace-1 in the two related species C. elegans and C. briggsae. We report here partial sequences of ace-2 (encoding class B) and of two other ace sequences located in close proximity on chromosome II in C. elegans and C. briggsae. These two sequences are provisionally named ace-x and ace-y, because it is not possible at the moment to establish which of these two genes corresponds to ace-3. Ace-x and ace-y are transcribed in vivo as shown by RT-PCR and they are likely to be included in a single operon.
authors.affiliation: Groupe Cholinestérases, Différenciation cellulaire et Croissance, Centre INRA de Montpellier, France.
authors.forename: M
authors.initials: M
authors.lastname: Grauso
authors.forename: E
authors.initials: E
authors.lastname: Culetto
authors.forename: D
authors.initials: D
authors.lastname: Combes
authors.forename: Y
authors.initials: Y
authors.lastname: Fedon
authors.forename: J P
authors.initials: JP
authors.lastname: Toutant
authors.forename: M
authors.initials: M
authors.lastname: Arpagaus
mesh_terms: D000110:Acetylcholinesterase / Q000235:genetics*; D000595:Amino Acid Sequence; D000818:Animals; D002107:Caenorhabditis / Q000235:genetics*; D017173:Caenorhabditis elegans / Q000235:genetics; D002874:Chromosome Mapping; D003001:Cloning, Molecular; D008969:Molecular Sequence Data; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D017386:Sequence Homology, Amino Acid
chemical_list: D000110:Acetylcholinesterase