Different properties of four molecular forms of protein kinase CK2 from Saccharomyces cerevisiae.
CK2 is a pleiotropic constitutively active serine/threonine protein kinase composed of two catalytic alpha- and two regulatory beta-subunits, whose regulation is still not well understood. It seems to play an essential role in regulation of many cellular processes. Four active forms of CK2, composed of alphaalpha'betabeta', alpha(2)betabeta', alpha'(2)betabeta', and a free alpha'-subunit were isolated from wild-type yeast and strains containing a single deletion of the catalytic subunit. Each species exhibits properties typical for CK2, but they differ in substrate specificity and sensitivity to inhibitors. This suggests that each CK2 isomer may regulate different process or may differ in the way of its regulation.
Domańska
Katarzyna
K
Department of Molecular Biology, Environmental Protection Institute, Catholic University of Lublin, Lublin, Poland.
Zieliński
Rafał
R
Kubiński
Konrad
K
Sajnaga
Ewa
E
Masłyk
Maciej
M
Bretner
Maria
M
Szyszka
Ryszard
R
D000255:Adenosine Triphosphate / Q000378:metabolism; D001665:Binding Sites; D047390:Casein Kinase II / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D002384:Catalysis; D007527:Isoenzymes / Q000302:isolation & purification / Q000378:metabolism*; D007700:Kinetics; D021122:Protein Subunits / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000201:enzymology*; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism; D017384:Sequence Deletion
D007527:Isoenzymes; D021122:Protein Subunits; D029701:Saccharomyces cerevisiae Proteins; D000255:Adenosine Triphosphate; D047390:Casein Kinase II