title: Fourier transform infrared spectroscopic studies on the secondary structure of the Ca2+-ATPase of sarcoplasmic reticulum.
abstract: Fourier transform infrared spectroscopy has been applied to the study of the secondary structure of the Ca2+-ATPase of sarcoplasmic reticulum. An attempt is made to quantitatively assess the various secondary structures present. Values of 45% alpha-helix, 32% beta-sheet and 23% turns were obtained. A comparison is made of these results and those obtained using other techniques such as CD and Raman spectroscopy. The various assumptions inherent in the present procedure are discussed. The effect of various ligands, e.g. Ca2+, vanadate, ATP and phosphate, upon the structure were investigated. Upon binding these ligands no marked spectral changes were observed.
authors.affiliation: Departamento de Bioquimica, Universidad de Murcia, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Villalain
authors.forename: J C
authors.initials: JC
authors.lastname: Gomez-Fernandez
authors.forename: M
authors.initials: M
authors.lastname: Jackson
authors.forename: D
authors.initials: D
authors.lastname: Chapman
mesh_terms: D000818:Animals; D000252:Calcium-Transporting ATPases; D002942:Circular Dichroism; D005583:Fourier Analysis; D011487:Protein Conformation; D011817:Rabbits; D012519:Sarcoplasmic Reticulum / Q000201:enzymology*; D013059:Spectrum Analysis, Raman
chemical_list: D000252:Calcium-Transporting ATPases