The three-dimensional structure of the vasoactive polypeptide endothelin, the most potent vasoconstrictor yet identified, has been determined by X-ray crystallography to 2.18 A resolution. This intermediate-sized structure was solved by molecular rep ...
The three-dimensional structure of the vasoactive polypeptide endothelin, the most potent vasoconstrictor yet identified, has been determined by X-ray crystallography to 2.18 A resolution. This intermediate-sized structure was solved by molecular replacement techniques using a fragment of an NMR-derived model for initial phasing of the data. However, comparisons of the final X-ray structure with the many diverse models derived from NMR data indicate some important differences, especially in the carboxy-terminal region of the molecule: the entire carboxy terminal tail (residues 16-21) is helical in the crystal structure, but not in any of the NMR structures. This may be a functionally significant difference as this region is crucial for receptor binding and vasoactivity.
Related Citations:
A Comparison of X-Ray and NMR Structures for Human Endothelin-1 Wallace, B.A.,Janes, R.W.,Bassolino, D.,Krystek Junior, S. (1995) Protein Sci. 4: 75
Comparison of the Structure of the Endothelin Receptor Agonist Bq123 with the Crystal Structure of the C-Terminal Tail of Endothelin Peishoff, C.E.,Janes, R.W.,Wallace, B.A. () TO BE PUBLISHED --: --
Organizational Affiliation:
Department of Crystallography, Birkbeck College, University of London, UK.
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