Expression, purification and characterisation of a novel mutant of the human protein kinase CK2.

Abstract:

:The recombinant catalytic subunit of human protein kinase CK2 bas been mutagenised at the C-terminal region in an attempt to induce this tail to fold. We suppose in fact that this unstructured C-terminus just might be responsible for the high degradability of the human enzyme. On the basis of theoretical calculations we choose to substitute two distal prolines with alanines (PA 382-384). The mutant bas been purified to the electrophoretic homogeneity by means of three chromatographic steps. By circular dichroism Spectroscopy we verified if the double amino acids substitution reflected on the secondary structure of the recombinant a subunit. According to our theoretical predictions, we observed that the alpha-helix content of the protein increased when the two distal prolines were substituted by alanines. Moreover the mutant catalytic subunit shows a reduced ability to bind a classical inhibitor such as heparin.

journal_name

Mol Biol Rep

authors

Grasselli E,Noviello G,Rando C,Nicolini C,Vergani L

doi

10.1023/a:1023934805326

keywords:

subject

Has Abstract

pub_date

2003-06-01 00:00:00

pages

97-106

issue

2

eissn

0301-4851

issn

1573-4978

journal_volume

30

pub_type

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