6FCE

NMR ensemble of Macrocyclic Peptidomimetic Containing Constrained a,a-dialkylated Amino Acids with Potent and Selective Activity at Human Melanocortin Receptors

• PDB DOI:  https://doi.org/10.2210/pdb6FCE/pdb
• BMRB: 34222

• Classification: DE NOVO PROTEIN
• Organism(s): synthetic construct
• Mutation(s): No 


• Deposited: 2017-12-20 Released: 2018-04-25 
• Deposition Author(s): Brancaccio, D., Carotenuto, A., Grieco, P., Merlino, F., Zhou, Y., Cai, M., Yousif, A.M., Di Maro, S., Novellino, E., Hruby, V.J.

---

Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Literature

Development of Macrocyclic Peptidomimetics Containing Constrained alpha , alpha-Dialkylated Amino Acids with Potent and Selective Activity at Human Melanocortin Receptors.

Merlino, F., Zhou, Y., Cai, M., Carotenuto, A., Yousif, A.M., Brancaccio, D., Di Maro, S., Zappavigna, S., Limatola, A., Novellino, E., Grieco, P., Hruby, V.J.

(2018) J Med Chem 61: 4263-4269

• PubMed: 29660981 
• DOI: https://doi.org/10.1021/acs.jmedchem.8b00488
• Primary Citation of Related Structures:  
  6FCE


• PubMed Abstract: 
  

We report the development of macrocyclic melanocortin derivatives of MT-II and SHU-9119, achieved by modifying the cycle dimension and incorporating constrained amino acids in ring-closing. This study culminated in the discovery of novel agonists/antagonists with an unprecedented activity profile by adding pieces to the puzzle of the melanocortin receptor selectivity. Finally, the resulting 19- and 20-membered rings represent a suitable frame for the design of further therapeutic ligands as selective modulators of the melanocortin system.

---

Organizational Affiliation: 

Department of Chemistry and Biochemistry , University of Arizona , 1306 E. University Boulevard , Tucson , Arizona 85721 , United States.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 0.87 kDa 
• Atom Count: 62 
• Modelled Residue Count: 7 
• Deposited Residue Count: 7 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ACP-HIS-DPHE-ARG-TRP-ASP-NH2	A	7	synthetic construct	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2018-04-25 
Deposition Author(s): Brancaccio, D., Carotenuto, A., Grieco, P., Merlino, F., Zhou, Y., Cai, M., Yousif, A.M., Di Maro, S., Novellino, E., Hruby, V.J.

Revision History  

• Version 1.0: 2018-04-25
  Type: Initial release
  
• Version 2.0: 2018-05-23
  Changes: Atomic model, Data collection, Database references, Source and taxonomy