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Evidence of rainbow trout prolactin interaction with its receptor through unstable homodimerisation.
Le Rouzic, Philippe; Sandra, Olivier; Grosclaude, Jeanne et al.
2001In Molecular and Cellular Endocrinology, 172 (1-2), p. 105-13
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Keywords :
Animals; Base Sequence; Dimerization; Kinetics; Molecular Sequence Data; Oncorhynchus mykiss/genetics/metabolism; Prolactin/metabolism; Protein Binding; Protein Structure, Tertiary; RNA/metabolism; Receptors, Prolactin/genetics/metabolism; Sequence Analysis, DNA; Sequence Homology, Nucleic Acid; Surface Plasmon Resonance; Tissue Distribution; Water-Electrolyte Balance
Abstract :
[en] This study aims to characterise Prolactin receptor (PRLR) in rainbow trout for which no information is available despite the availability of Salmonid PRL preparations. By screening a freshwater rainbow trout intestine cDNA library with a probe corresponding to the extracellular domain (ECD) of tilapia PRLR, we have cloned a 2.5 kb insert coding for the PRLR. The mature protein of 614 amino acid residues is similar to PRLR isolated in tilapia and also the long form of mammalian PRLR. Analysis of PRLR gene expression in osmoregulatory organs revealed the presence of a unique transcript, thus confirming the involvement of this hormone in the control of osmoregulation in this fish species. By using surface plasmon resonance (SPR) technology, kinetic measurement of interaction between trout PRL and its receptor ECD was studied. This approach allowed us to demonstrate the formation of a transient, unstable homodimeric complex. This unstability could explain the inability to perform binding experiments using homologous PRL. In contrast, heterologous lactogenic ligands were able to interact through a more stable complex. Whether these characteristics of PRL-receptor interaction in rainbow trout are different to what occurs in tilapia where a homologous radioreceptor assay was developed would require further studies.
Disciplines :
Anatomy (cytology, histology, embryology...) & physiology
Author, co-author :
Le Rouzic, Philippe;  Institut Scientifique de Recherche Agronomique - INRA > Station de Recherche Commune en Ichtyophysiologie, Biodiversité et Environnement > Group on Physiology of Adaptation and Stress
Sandra, Olivier;  Institut Scientifique de Recherche Agronomique - INRA > Station de Recherche Commune en Ichtyophysiologie, Biodiversité et Environnement > Group on Physiology of Adaptation and Stress
Grosclaude, Jeanne;  Institut Scientifique de Recherche Agronomique - INRA > Unité de Virologie et Immunologie Moléculaire
Rentier-Delrue, Françoise ;  Université de Liège - ULiège > Département des sciences de la vie > Biologie et génétique moléculaire - GIGA-R : Coordination scientifique
Jolois, Olivier ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Histologie humaine
Tujague, Michel;  Centre National de la Recherche Scientifique - CNRS > Unité de recherche 6062 Interaction cellulaire et Moléculaire
Pakdel, Farzad;  Centre National de la Recherche Scientifique - CNRS > Unité de recherche 6062 Interaction cellulaire et Moléculaire
Sandowski, Yael;  Hebrew University of Jerusalem > Faculty of Agriculture > Institute of Biochemistry, Food and Nutrtion
Cohen, Yael;  Hebrew University of Jerusalem > Faculty of Agriculture > Institute of Biochemistry, Food and Nutrtion
Gertler, Arieh;  Hebrew University of Jerusalem > Faculty of Agriculture > Institute of Biochemistry, Food and Nutrtion
Prunet, Patrick;  Institut Scientifique de Recherche Agronomique - INRA > Station de Recherche Commune en Ichtyophysiologie, Biodiversité et Environnement > Group on Physiology of Adaptation and Stress
Language :
English
Title :
Evidence of rainbow trout prolactin interaction with its receptor through unstable homodimerisation.
Publication date :
2001
Journal title :
Molecular and Cellular Endocrinology
ISSN :
0303-7207
eISSN :
1872-8057
Publisher :
North Holland Publishing Company, Amsterdam, Netherlands
Volume :
172
Issue :
1-2
Pages :
105-13
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 09 November 2010

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