A family of cyclin D homologs from plants differentially controlled by growth regulators and containing the conserved retinoblastoma protein interaction motif.

Soni, Rajeev; Carmichael, Jeremy P.; Shah, Zahid H.; Murray, James A. H.

doi:10.1105/tpc.7.1.85

Cited by 339 publications

(213 citation statements)

References 101 publications

(128 reference statements)

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“…Recently, G1 cyclins have been cloned from plants. These genes, called cyclin 5, are considered to be homologs of mammalian D-type cyclins Soni et al, 1995). In plants, two methods are used to analyze cell-cycleregulated expression of cyclin genes.…”

Section: Introductionmentioning

confidence: 99%

Cell‐cycle‐regulated transcription of A‐ and B‐type plant cyclin genes in synchronous cultures

et al. 1997

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SummarySynchronously dividing cell cultures of Catharanthus roseus were used to isolate cDNAs for two mitotic cyclins, named CYS and CYM. The deduced protein sequence of CYS is similar to that of A-type cyclins, and CYM belongs to the group of B-type cyclins. In a fashion similar to the pattern of expression seen for A-type and B-type cyclins in mammalian cells, CYS is expressed before CYM in C. roseus cells during the cell cycle. CYS mRNA accumulated at the onset of S phase and disappeared early in the G2 phase, whereas CYM mRNA was detected in the G2 and M phases of the cell cycle. Tobacco homologs of the two genes showed similar cell-cycle dependent expression patterns in synchronous cultures of tobacco BY2 cells. In both systems, CYS was expressed much earlier in the cell cycle than most other plant A-type cyclins, and hence CYS along with the soybean cyclGm can be classified into a distinct subclass. The activities of CYMand CYS promoters during the cell cycle were analyzed in stably transformed tobacco BY2 cells. Cyclin promoter sequences of 0.5 kb could confer the typical cell-cycle-dependent expression to the ~-glucuronidase (GUS) reporter gene: the CYS Received 15 July 1996; revised 20 December 1996; accepted 17 January 1997. *For correspondence (fax +81 3 3814 1728; e-mail masakito@uts2.s.u-tokyo.ac.jp). tPresent address: Laboratoire de Biologie Generale, CNRS Universite Louis Pasteur, 12 Rue de I'Universite, 67000 Strasbourg, France. tPresent address: Botanical Gardens, Faculty of Science, University of Tokyo, Hakusan, Tokyo, 112 Japan.promoter directed S-phase-specific expression, whereas the CYM promoter drove M-phase-specific expression. These results indicate the important role of transcriptional regulation in the oscillations of cyclin mRNA levels during the cell cycle.

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Section: Introductionmentioning

confidence: 99%

Cell‐cycle‐regulated transcription of A‐ and B‐type plant cyclin genes in synchronous cultures

et al. 1997

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“…4 a, boxed), which closely resembles the bipartite motif, a nuclear targeting signal (rrXXXXXXXXXXrrrrr, where r is either R or K ; Dingwall & Laskey, 1991). The presence of a nuclear targeting signal is also a common feature of tumour virus oncoproteins, and is (Soni et al, 1995). The key residues of the motif (L, C and E) are shown in white on black and acidic residues (E and D) frequently occurring around the motif are shown in bold.…”

Section: Predicted Genome Organization and Relationships With Other Nmentioning

confidence: 99%

Sequences of ten circular ssDNA components associated with the milk vetch dwarf virus genome.

Sano

Wada

Hashimoto

et al. 1998

Journal of General Virology

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“…This sort of analysis can reveal local elemental elongation rates as well as mitotic cycle times for cells in the meristem. With such data in hand, more refined hypotheses can be fashioned and tested by using new constructs in which cyc7At expression or that of a cyclin active in the G1 phase of the cell cycle (Soni et al, 1994;Fuerst et al, 1996) are driven by promoters with different spatial patterns of expression.…”

Section: Finding the Source Of "Extra" Cells In Cdc2aat::cyclat Plantsmentioning

confidence: 99%

Why Do Plant Cells Divide?

Jacobs

1997

Plant Cell

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A family of cyclin D homologs from plants differentially controlled by growth regulators and containing the conserved retinoblastoma protein interaction motif.

Cited by 339 publications

References 101 publications

Cell‐cycle‐regulated transcription of A‐ and B‐type plant cyclin genes in synchronous cultures

Cell‐cycle‐regulated transcription of A‐ and B‐type plant cyclin genes in synchronous cultures

Sequences of ten circular ssDNA components associated with the milk vetch dwarf virus genome.

Why Do Plant Cells Divide?

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