The Arabidopsis GNARLED gene encodes the NAP125 homolog and controls several actin-based cell shape changes |
| |
Authors: | I. Zimmermann R. Saedler M. Mutondo M. Hulskamp |
| |
Affiliation: | (1) Botanical Institute, University of Köln, Gyrhofstrasse 15, 50931 Köln, Germany |
| |
Abstract: | In plants many aspects of cell shape regulation are controlled by actin-dependent processes. The ARP2/3 complex has been recognized as a regulator of actin organization. Mutations in genes encoding components of the ARP2/3 complex lead to cell shape defects in several cell types, including trichomes, epidermal pavement cells and hypocotyl cells. We show here that mutations in the GNARLED ( GRL) gene cause a similar range of phenotypes. The GRL gene encodes the Arabidopsis homolog of NAP125, which in animals is known to act as one regulator of the ARP2/3-regulating complex WAVE-HSPC300. As an HSPC300 homolog is present in the Arabidopsis genome but no WAVE homolog has yet been found, the existence of a related regulation pathway was doubtful. Our finding that GRL encodes a putative regulator of the WAVE-HSPC300 complex, NAP125, combined with the phenotypic similarity between arp2/3 and grl mutants, provides evidence that the ARP2/3 complex is indeed regulated by the above mentioned pathway in Arabidopsis.Communicated by G. JürgensThe first two authors contributed equally to the work |
| |
Keywords: | Cell shape regulation Actin ARP 2/3 complex WAVE-HSPC300 complex |
本文献已被 PubMed SpringerLink 等数据库收录! |
|