Abstract:
:A plant 135-kDa actin-bundling protein (P-135-ABP) isolated from pollen tubes of Lilium longiflorum (Thunb.) binds stoichiometrically to F-actin filaments and bundles them in vitro (E. Yokota et al., 1998, Plant Physiol. 116: 1421-1429). To further understand the mechanism of actin-filament bundle formation by P-135-ABP, the polarity of each F-actin filament in bundles was examined using myosin subfragment 1 (S-1). Dissociation of F-actin filaments from bundles organized by P-135-ABP was induced by S-1. However, F-actin filaments that remained in a bundle and decorated by S-1 showed uniform polarity. These results indicate that P-135-ABP arranges F-actin filaments into bundles with uniform polarity and consequently plays a key role in the orientation of cytoplasmic streaming in pollen tubes.
journal_name
Plantajournal_title
Plantaauthors
Yokota E,Shimmen Tdoi
10.1007/s004250050631subject
Has Abstractpub_date
1999-08-12 00:00:00pages
264-266issue
2eissn
0032-0935issn
1432-2048pii
10.1007/s004250050631journal_volume
209pub_type
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