In:
The Plant Journal, Wiley, Vol. 60, No. 4 ( 2009-11), p. 666-678
Kurzfassung:
hMMS21 is a SUMO E3 ligase required for the prevention of DNA damage‐induced apoptosis, and acts by facilitating DNA repair in human cells. The Arabidopsis genome contains a putative MMS21 homologue capable of interacting with the SUMO E2 conjugating enzyme AtSCE1a, as indicated by a yeast two‐hybrid screen and bimolecular fluorescence complementation experiments. In vitro and in vivo data demonstrated that AtMMS21 was a SUMO E3 ligase. We identified the Arabidopsis AtMMS21 null T‐DNA insertion mutant mms21‐1 , which had a short‐root phenotype, and affected cell proliferation in the apical root meristem, as indicated by impaired expression of the cell division marker CYCB1:GUS in mms21‐1 roots. The mms21‐1 roots had reduced responses to exogenous cytokinins, and decreased expression of the cytokinin‐induced genes ARR3 , ARR4 , ARR5 and ARR7 , compared with the wild type. Thus, our findings suggest that the AtMMS21 gene is involved in root development via cell‐cycle regulation and cytokinin signalling.
Materialart:
Online-Ressource
ISSN:
0960-7412
,
1365-313X
DOI:
10.1111/tpj.2009.60.issue-4
DOI:
10.1111/j.1365-313X.2009.03992.x
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2009
ZDB Id:
2020961-7
SSG:
12