Conformational analysis of linear peptide (Glu(1)-Leu(2)-Leu(3)-Gly(4)-Gly(5)-Arg(6)-Phe(7)NH(2))

Demir L., Karabulut A., Budak G., Sahin Y., Sefteroglu N.

TURKISH JOURNAL OF CHEMISTRY, cilt.23, sa.3, ss.257-262, 1999 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 23 Sayı: 3
  • Basım Tarihi: 1999
  • Dergi Adı: TURKISH JOURNAL OF CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.257-262
  • Atatürk Üniversitesi Adresli: Evet

Özet

Conformational energy-minimization of the Sea Anemone and Sea Pansy neuropeptide Pol-RFamide (Glu(1)-Leu(2)-Leu(3)-Gly(4)-Gly(5)-Arg(6)-Phe(7) NH2) was carried out by molecular mechanics (MM). The linkage bonds were characterized by the torsion angles theta, psi, and omega and the side groups were characterized by the torsion angles chi(1), chi(2), chi(3) The energy-map for each monopeptide of the Pol-RFamide I was drawn in the range of -180 degrees to 180 degrees with increments of 20 degrees. Conformation facilities for monopeptides were determined from these maps. These results were used in the analysis of the dipeptide (Glu(1)-Leu(2)). Thee, the (Glu(1)-Leu(2)-Leu(3)) tripeptide was examined using the calculated results for the dipeptide. Conformational analysis of the (Glu(1)-Leu(2)-Leu(3)-Gly(4)) tetrapeptide was performed using the low-energy values for the tripeptide. The space structure of the (Glu(1)-Leu(2)-Leu(3)-Gly(4)-Gly(5)-Arg(6)- Phe(7)NH(2)) neuropeptide was found as a result of minimization of energies by rotating the tetrapeptide (Glu(1)-Leu(2)-Leu(3)-Gly(4)) and the dipeptide (Arg(6)-Phe(7)NH(2)) about, the monopeptide (Gly).