3CMH

SYNTHETIC LINEAR TRUNCATED ENDOTHELIN-1 AGONIST

Summary for 3CMH

• Entry DOI: 10.2210/pdb3cmh/pdb
• Related: 6CMH
• Descriptor: PROTEIN (ENDOTHELIN-1) (1 entity in total)
• Functional Keywords: vasoconstrictor, endothelin-1, contractile protein
• Cellular location: Secreted: P22388
• Total number of polymer chains: 1
• Total formula weight: 1881.20

Authors

Hewage, C.M.,Jiang, L.,Parkinson, J.A.,Ramage, R.,Sadler, I.H. (deposition date: 1998-09-03, release date: 1999-09-29, Last modification date: 2023-12-27)

Primary citation

Hewage, C.M.,Jiang, L.,Parkinson, J.A.,Ramage, R.,Sadler, I.H.
Solution structure of a novel ETB receptor selective agonist ET1-21 [Cys(Acm)1,15, Aib3,11, Leu7] by nuclear magnetic resonance spectroscopy and molecular modelling.
J.Pept.Res., 53:223-233, 1999

PubMed Abstract: The solution structure of a biologically active modified linear endothelin-1 analogue, ET1-21[Cys(Acm)1,15, Aib3,11, Leu7], has been determined for the first time by two-dimensional nuclear magnetic resonance spectroscopy in a methanol-d3/water solvent mixture. Out of approximately one hundred linear peptide analogues tested by biological assay, this peptide, together with a dozen others, showed significant ETB selective agonist activity. Here we report the solution structure of an ETB selective agonist of a full-length, synthetic linear endothelin analogue. The calculated structures indicate that the peptide adopts an alpha-helical conformation between residues Ser5-His16, whilst both N- and C-termini show no preferred conformation. These results suggest that the disulphide bridges normally associated with endothelin and sarafotoxin peptides may not necessarily be important for either ETB receptor binding activity or the formation of a helical conformation in solution.

PubMed: 10231710
DOI: 10.1034/j.1399-3011.1999.00001.x

Experimental method

SOLUTION NMR