title: Cloning and expression of two isoforms of guanylate cyclase C (GC-C) from the European eel (Anguilla anguilla).
abstract: Complementary DNA fragments for two isoforms of particulate guanylate cyclase C (GC-C) were cloned from the intestine of the European eel (Anguilla anguilla). Both isoforms exhibited higher nucleotide and amino acid sequence homologies to members of the GC-C family from other species than the related guanylate cyclase A or B (GC-A or GC-B) isoforms from the eel. Northern blots indicated that probes for both isoforms, termed GC-C1 and GC-C2, selectively hybridised to 4.8-kb transcripts in the intestine and the kidney. Expression of the GC-C2 transcript in the intestine was increased by 100% following the transfer of yellow FW-acclimated eels to SW. Likewise developmental maturation of yellow eels into pre-migratory silver eels resulted in a significant increase (60%) in the intestinal expression of GC-C2. No changes in expression of GC-C2 were seen in the kidney under any condition. RT-PCR indicated that the GC-C2 isoform is only expressed in anterior and mid-gut segments in FW-acclimated yellow eels. However, expression is also extended to the posterior gut segment when yellow eels are acclimated to SW or following developmental transformation into silver eels.
authors.affiliation: School of Biology, Bute Medical Buildings, University of St Andrews, St Andrews, KY16 9TS, Fife, UK.
authors.forename: M M
authors.initials: MM
authors.lastname: Comrie
authors.forename: C P
authors.initials: CP
authors.lastname: Cutler
authors.forename: G
authors.initials: G
authors.lastname: Cramb
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D004524:Eels / Q000235:genetics*; D015870:Gene Expression; D006162:Guanylate Cyclase / Q000737:chemistry / Q000235:genetics*; D007527:Isoenzymes / Q000737:chemistry / Q000235:genetics; D008969:Molecular Sequence Data; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism
chemical_list: D007527:Isoenzymes; D012333:RNA, Messenger; D006162:Guanylate Cyclase