Searchable abstracts of presentations at key conferences in endocrinology

ea0070aep849 | Reproductive and Developmental Endocrinology | ECE2020

Aminoacidic residues discriminating human choriogonadotropin (hCG) and luteinizing hormone (LH) binding to the human receptor (LHCGR)

Lazzaretti Clara , Secco Valentina , Paradiso Elia , Sperduti Samantha , Rutz Claudia , Kreuchwig Annika , Krause Gerd , Simoni Manuela , Casarini Livio

The human luteinizing hormone (LH)/choriogonadotropin (hCG) receptor (LHCGR) discriminates its two hormone ligands. LHCGR differs to the murine receptor (Lhr) in aminoacid residues potentially involved in qualitative discerning of LH and hCG, the latter absent in rodents. We aim to identify LHCGR residues involved in hCG/LH discrimination, indicating evolutionary determinants of human LH/hCG endocrine system. After comparing the LHCGR and Lhr sequences, we developed eight ...

ea0032p577 | Female reproduction | ECE2013

The hinge region of the lutropin receptor mediates different activation mechanisms: CG induces trans- and LH only cis-initialization

Grzesik Paul , Kreuchwig Annika , Teichmann Anke , Furkert Jens , Rutz Claudia , Wiesner Burghard , Kleinau Gunnar , Schulein Ralf , Gromoll Jorg , Krause Gerd

The lutropin receptor (LHR) is associated with reproduction and becomes activated by choriogonadotropin (CG) or lutropin (LH) resulting in different physiological functions with regard to differing signaling cascades. The underlying mechanisms in receptor/hormone interaction are not yet understood. CG is known to induce trans-activation at LHR oligomers (activates a second receptor), but details of LH mechanisms were not clarified yet.To study this issue...