Molecular cloning, tissue distribution and sequence analysis of complete glucokinase cDNAs from gilthead seabream (Sparus aurata), rainbow trout (Oncorhynchus mykiss) and common carp (Cyprinus carpio)
S. Panserat et al., Molecular cloning, tissue distribution and sequence analysis of complete glucokinase cDNAs from gilthead seabream (Sparus aurata), rainbow trout (Oncorhynchus mykiss) and common carp (Cyprinus carpio), BBA-GEN SUB, 1474(1), 2000, pp. 61-69
The enzyme glucokinase (GK) (EC 2.7.1.1) plays an important role in the con
trol of glucose homeostasis. Qualitative and/or quantitative variations in
GK enzyme have been postulated by previous studies to explain why dietary c
arbohydrate utilisation is lower in gilthead seabream (Sparus aurata) and r
ainbow trout (Oncorhynchus mykiss) than in common carp (Cyprinus carpio). I
n this study, we report the isolation and characterisation of a full-length
cDNA coding for GK in these teleosts. Amino acid sequences derived from th
ese cDNA clones are highly similar to other vertebrate GKs. These findings,
including a detailed phylogenetic analysis, reveal that GK gene highly hom
ologous to mammalian GK exists in these fish species with similar tissue sp
ecific expression (mainly liver). (C) 2000 Elsevier Science B.V. All rights
reserved.