title: [Various properties of cardiac troponin C tryptic peptides].
abstract: Using chromatography and preparative polyacrylamide gel electrophoresis, tryptic peptides TP 1 (residues 47-83), TP 2 (residues 84-118) and TP 3 (residues 119-161) were isolated in a highly homogeneous state from cardiac troponin C. Peptides TP 1, TP 2 and TP 3 were found to contain isolated cation-binding sites II, III and IV of cardiac troponin C. The interaction of these peptides with troponins I and T was studied. It was found that only peptide TP 2 could interact with troponin I. Neither of the peptides isolated interacted with troponin T. The cation-binding properties and structural peculiarities of peptide TP 1 were investigated. It was shown that despite its small size (37 amino acid residues), peptide TP 1 retained its ability to bind Ca2+ which caused conformational changes in the peptide structure. This was accompanied by changes in the electrophoretic mobility and absorption of TP 1 on phenyl-Sepharose.
authors.forename: A D
authors.initials: AD
authors.lastname: Verin
authors.forename: L A
authors.initials: LA
authors.lastname: Baratova
authors.forename: N B
authors.initials: NB
authors.lastname: Gusev
mesh_terms: D000818:Animals; D002417:Cattle; D004591:Electrophoresis, Polyacrylamide Gel; D006868:Hydrolysis; D009206:Myocardium / Q000032:analysis*; D010446:Peptide Fragments / Q000032:analysis / Q000302:isolation & purification*; D011487:Protein Conformation; D014336:Troponin / Q000032:analysis / Q000302:isolation & purification*; D019209:Troponin C; D019210:Troponin I; D014357:Trypsin
chemical_list: D010446:Peptide Fragments; D014336:Troponin; D019209:Troponin C; D019210:Troponin I; D014357:Trypsin
vernacular_title: Izuchenie nekotorykh svoĭstv tripticheskikh peptidov troponina C serdtsa.