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. 2005 Apr;137(4):1197-204.
doi: 10.1104/pp.105.060004.

Ubiquitin-mediated proteolysis. To be in the right place at the right moment during nodule development

Eva Kondorosi  1 , Miguel Redondo-Nieto, Adam Kondorosi
Affiliations

Ubiquitin-mediated proteolysis. To be in the right place at the right moment during nodule development

Eva Kondorosi et al. Plant Physiol. 2005 Apr.
No abstract available

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Figures

Figure 1.
Figure 1.
Developmental stages of indeterminate-type nodule (N) and lateral root (LR) formation. The root zones competent for N or LR development are indicated on the longitudinal root section. Transverse section of the root (R) shows epidermis (Ep), cortex (C), endodermis (En), pericycle (P), phloem (Ph), and xylem (X). Colors indicate expression of cycA2 (red), 1-aminocyclopropane-1-carboxylate synthase (yellow), and ccs52A, the overlapping expression of cycA2 and ccs52A (green), and the position of protoxylem poles (brown). R + aux, auxin-treated root section.
Figure 2.
Figure 2.
A, Plant CDKs and cyclins control different phases of the mitotic cycle. B, Inhibition of mitotic CDKs converts the mitotic cycle to endocycle.
Figure 3.
Figure 3.
A, The ubiquitin proteasome system. The ubiquitin (Ub) is covalently attached to substrate proteins (Sub) through sequential action of the E1, E2, and E3 enzymes. The polyubiquitinated proteins are recognized by the 26S proteasome, which degrades the substrate proteins and recycles the ubiquitin. The E3 enzymes achieve the specificity of ubiquitin-dependent proteolysis. B, The SCF and the APC E3 enzymes are dedicated to basic cell-cycle control. Rbx/APC11 and Cullin/APC2 are related subunits. SCF is constitutively active, while the WD40-repeat proteins Cdc20 and Cdh1/Ccs52A,B activate APC from M-phase to S-phase. The cullin/APC2 and the Rbx/APC11 subunits are related. The substrate-specificity determinants (Ssd) are the F-box proteins in the SCF and Cdc20 and Cdh1/Ccs52A,B in the APC. In addition to polyubiquitination of cell cycle proteins, the SCF and the APC are also active in nonproliferating cells mediating protein degradation in various cellular processes. The SCF via different F-box proteins is involved in phytohormone signaling pathways.
See this image and copyright information in PMC

References

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