Site-specific Substitutions Eliminate Aggregation Properties of Hemopressin.
Chem Biol Drug Des
; 86(6): 1433-7, 2015 Dec.
Article
em En
| MEDLINE
| ID: mdl-26109481
ABSTRACT
Hemopressin is a naturally occurring and therapeutically relevant peptide with applications in hypertension, pain, addiction, and obesity. We had previously demonstrated that hemopressin converts into amyloid-like fibrils under aqueous conditions. However, the amino acid residues that modulate the aggregation propensity of hemopressin were not identified. In this study, we designed and synthesized 25 different analogs of hemopressin and analyzed their aggregation properties using the principle of dynamic light scattering. As a result, we were able to identify four conservative changes in the peptide sequence (Val(2) âDVal(2), Asn(3) âGln(3) Leu(7) âNpg(7) and C-OHâC-NH2) that minimize aggregation propensity of hemopressin. The results indicate that hemopressin aggregation is cooperative in nature and involves contribution from multiple amino acids within the peptide chain. The analogs and the corresponding aggregation propensity data reported in this study would be useful for researchers investigating therapeutic properties of hemopressin, which have been hampered due to the tendency of hemopressin to aggregate in aqueous solutions.
Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Fragmentos de Peptídeos
/
Hemoglobinas
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Chem Biol Drug Des
Assunto da revista:
BIOQUIMICA
/
FARMACIA
/
FARMACOLOGIA
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Estados Unidos