Abstract:
:Homooligomers constructed with 4- and 6-amino acid fragments of melanocortin (alpha-MSH) bind with higher affinity and with apparent cooperativity to melanocortin receptor, compared to their constituent monomers. Individual ligands were tethered with various spacers of different length and rigidity and the influence of spacers on binding was studied. Binding assays were performed on cells transfected with the melanocortin receptor, hMC4R. There is a 5-7-fold decrease in the EC(50) with the addition of each subunit, going from monomer to trimer. The Hill coefficient increases from 0.76 for the monomer to 1.12 for the dimer and 1.35 for the trimer. These data show a general trend of increasing avidity with increasing number of ligands in oligomers.
journal_name
Bioorg Med Chem Lettjournal_title
Bioorganic & medicinal chemistry lettersauthors
Vagner J,Handl HL,Gillies RJ,Hruby VJdoi
10.1016/j.bmcl.2003.09.079subject
Has Abstractpub_date
2004-01-05 00:00:00pages
211-5issue
1eissn
0960-894Xissn
1464-3405pii
S0960894X03010710journal_volume
14pub_type
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