Distinctive features of plant protein kinase CK2.
In plants, protein kinase CK2 is involved in different processes that control many aspects of metabolism and development. In mammals and yeast the enzyme is a heterotetramer composed of two types of subunits. During years the subunit composition of the maize protein kinase CK2 enzyme has been a source of controversy. We have recently characterized the maize holoenzyme subunits. Our results show that multiple catalytic and regulatory subunits are expressed in maize and are able to specifically interact with other alpha and beta subunits suggesting a high level of heterogeneity in the typical heterotetrameric structure. Here, we summarize data available on plant CK2 enzymes, in order to clarify the distinctive features and functions of plant protein kinase CK2.
Riera
M
M
Departament de Genètica Molecular, Institut de Biologia Molecular de Barcelona, Centre d'Investigació i Desenvolupament, C.S.I.C., Spain.
Peracchia
G
G
Pagès
M
M
D000595:Amino Acid Sequence; D047390:Casein Kinase II; D020134:Catalytic Domain; D018076:DNA, Complementary / Q000378:metabolism; D019281:Dimerization; D015723:Gene Library; D006801:Humans; D008954:Models, Biological; D008969:Molecular Sequence Data; D010944:Plants / Q000201:enzymology*; D017346:Protein Serine-Threonine Kinases / Q000737:chemistry* / Q000378:metabolism / Q000502:physiology*; D017434:Protein Structure, Tertiary; D012441:Saccharomyces cerevisiae / Q000201:enzymology / Q000378:metabolism; D017386:Sequence Homology, Amino Acid; D020798:Two-Hybrid System Techniques; D003313:Zea mays / Q000201:enzymology
D018076:DNA, Complementary; D047390:Casein Kinase II; D017346:Protein Serine-Threonine Kinases