Analysis of the CK2-dependent phosphorylation of serine 13 in Cdc37 using a phospho-specific antibody and phospho-affinity gel electrophoresis.

Analysis of the CK2-dependent phosphorylation of serine 13 in Cdc37 using a phospho-specific antibody and phospho-affinity gel electrophoresis. Research Abstract Details 

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Analysis of the CK2-dependent phosphorylation of serine 13 in Cdc37 using a phospho-specific antibody and phospho-affinity gel electrophoresis. Abstract Text:

Yoshihiko Miyata,Eisuke Nishida,Yoshihiko Miyata,Eisuke Nishida,Yoshihiko Miyata,Eisuke Nishida,

The CK2-dependent phosphorylation of Ser13 in cell division cycle protein 37 (Cdc37), a kinase-specific heat shock protein 90 (Hsp90) cochaperone, has previously been reported to be essential for the association of Cdc37 with signaling protein kinases [Bandhakavi S, McCann RO, Hanna DE & Glover CVC (2003) J Biol Chem278, 2829-2836; Shao J, Prince T, Hartson SD & Matts RL (2003) J Biol Chem278, 38117-38220; Miyata Y & Nishida E (2004) Mol Cell Biol24, 4065-4074]. Here we describe a new phospho-specific antibody against Cdc37 that recognizes recombinant purified Cdc37 only when incubated with CK2 in the presence of Mg(2+) and ATP. The replacement of Ser13 in Cdc37 by nonphosphorylatable amino acids abolished binding to this antibody. The antibody was specific for phosphorylated Cdc37 and did not crossreact with other CK2 substrates such as Hsp90 and FK506-binding protein 52. Using this antibody, we showed that complexes of Hsp90 with its client signaling kinases, Cdk4, MOK, v-Src, and Raf1, contained the CK2-phosphorylated form of Cdc37 in vivo. Immunofluorescent staining showed that Hsp90 and the phosphorylated form of Cdc37 accumulated in epidermal growth factor-induced membrane ruffles. We further characterized the phosphorylation of Cdc37 using phospho-affinity gel electrophoresis. Our analyses demonstrated that the CK2-dependent phosphorylation of Cdc37 on Ser13 caused a specific gel mobility shift, and that Cdc37 in the complexes between Hsp90 and its client signaling protein kinases was in the phosphorylated form. Our results show the physiological importance of CK2-dependent Cdc37 phosphorylation and the usefulness of phospho-affinity gel electrophoresis in protein phosphorylation analysis.

Analysis of the CK2-dependent phosphorylation of serine 13 in Cdc37 using a phospho-specific antibody and phospho-affinity gel electrophoresis. Publishing Authors By Initials

Y Miyata,E Nishida,Y Miyata,E Nishida,Y Miyata,E Nishida,

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Analysis of the CK2-dependent phosphorylation of serine 13 in Cdc37 using a phospho-specific antibody and phospho-affinity gel electrophoresis. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The FEBS journal

VOLUME: 274

Page Numbers: 5690-703

Journal Abbreviation: FEBS J.

ISSN: 1742-464X

DAY: 8

MONTH: 10

YEAR: 2007

Analysis of the CK2-dependent phosphorylation of serine 13 in Cdc37 using a phospho-specific antibody and phospho-affinity gel electrophoresis. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Analysis of the CK2-dependent phosphorylation of serine 13 in Cdc37 using a phospho-specific antibody and phospho-affinity gel electrophoresis.

AFFILIATION: Department of Cell and Developmental Biology, Graduate School of Biostudies, Kyoto University, Japan.

Country: England

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MEDLINETA: FEBS J

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