当前位置： SCI文献检索 > BIOCHEMISTRY期刊下所有文献 > Applicability of the induced-fit model to glyceraldehyde-3-phosphate dehydrogenase from sturgeon muscle. Study of the binding of oxidized nicotinamide adenine dinucleotide and nicotinamide 8-bromoadenine dinucleotide.

Applicability of the induced-fit model to glyceraldehyde-3-phosphate dehydrogenase from sturgeon muscle. Study of the binding of oxidized nicotinamide adenine dinucleotide and nicotinamide 8-bromoadenine dinucleotide.

Abstract：

:A new method of calculation, based on a direct fitting of the protein fluorescence intensity observed upon coenzyme binding (H.-P. Lutz, unpublished results), is used to study the negative cooperative behavior of glyceraldehyde-3-phosphate dehydrogenase from sturgeon muscle. The calculation procedure simultaneously elaborates data obtained for four different protein concentrations, and it is able to compare different models by computing the minimal and critical sum of squares. Using this approach, it is shown that the induced-fit model [Koshland, D. E., Jr., Nemethy, G., & Filmer, D. (1966) Biochemistry 5,365] and the dimer of dimer model [Malhotra, O. P., & Bernhard, S. A. (1968) J. Biol. Chem. 243, 1243-1252] can both be applied for explaining the negative cooperativity observed upon coenzyme binding to sturgeon glyceraldehyde-3-phosphate dehydrogenase. In addition to the progressive modification of the binding affinity during ligand binding, different maximal fluorescence quenchings for the binding steps must be postulated; and furthermore, the binding capability decreases by decreasing the protein concentration. The fact that the induced-fit model can also be applied is rather in contradiction with the view generally accepted of a dimer of dimer structure of sturgeon glyceraldehyde-3-phosphate dehydrogenase. By use of the same approach, nicotinamide 8-bromoadenine dinucleotide is shown to bind to glyceraldehyde-3-phosphate dehydrogenase from sturgeon in a negative cooperative manner.

journal_name

Biochemistry

journal_title

Biochemistry

authors

Branlant G,Eiler B,Biellmann JF,Lutz HP,Luisi PL

doi

10.1021/bi00288a014

subject

Has Abstract

pub_date

1983-09-13 00:00:00

pages

4437-43

issue

19

eissn

0006-2960

issn

1520-4995

journal_volume

22

pub_type

杂志文章

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