Abstract:
:In higher eukaryotes, the proliferating cell nuclear antigen (PCNA) can be found associated to Cyclin D and Cdk4/6, the kinase complex responsible for cell cycle commitment in response to growth and mitogenic signals. During maize germination, PCNA can be found in protein complexes between 131 and 163 kDa. The sizes of PCNA protein complexes seem to change during germination, so that by the time the S phase starts, a complex of 100 kDa (likely the homotrimeric ring) is the predominant one. PCNA complexes during early germination contain (any of) two PSTAIRE-containing protein kinases of 32 and 36 kDa that readily phosphorylate both histone H1 and maize retinoblastoma-related (RBR) proteins. Kinase activity in PCNA complexes is markedly inhibited by roscovitine and olomoucine, two known Cdk inhibitors. The protein p13(Suc1) only pulls down the 36 kDa PSTAIRE protein. Kinase activity in PCNA immunoprecipitates is maximal during early germination, before the onset of the S-phase, whereas kinase activity associated to pl3(Suc1) reaches a peak later, after the onset of the S-phase. We discuss the physiological repercussions of these findings.
journal_name
Plant Mol Bioljournal_title
Plant molecular biologyauthors
de la Paz Sánchez M,Torres A,Boniotti MB,Gutierrez C,Vázquez-Ramo JMdoi
10.1023/a:1016029001537subject
Has Abstractpub_date
2002-09-01 00:00:00pages
167-75issue
2eissn
0167-4412issn
1573-5028journal_volume
50pub_type
杂志文章abstract::GALACTINOL SYNTHASE is the first committed enzyme in the raffinose biosynthetic pathway. We have previously characterized the maize (Zea mays) GALACTINOL SYNTHASE2 gene (ZmGOLS2) as abiotic stress induced. To further investigate the regulation of ZmGOLS2 gene expression, individual luciferase expression vectors,in whi...
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journal_title:Plant molecular biology
pub_type: 杂志文章
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journal_title:Plant molecular biology
pub_type: 杂志文章
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journal_title:Plant molecular biology
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journal_title:Plant molecular biology
pub_type: 杂志文章
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journal_title:Plant molecular biology
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journal_title:Plant molecular biology
pub_type: 杂志文章
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更新日期:1993-10-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2010-03-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00040693
更新日期:1994-11-01 00:00:00
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doi:10.1007/s11103-010-9621-8
更新日期:2010-05-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
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更新日期:1993-02-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
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journal_title:Plant molecular biology
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journal_title:Plant molecular biology
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journal_title:Plant molecular biology
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journal_title:Plant molecular biology
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更新日期:1991-07-01 00:00:00
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更新日期:2008-03-01 00:00:00
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