By Richard B. Meagher, Elizabeth C. McKinney (auth.), C. J. Staiger, F. Baluška, D. Volkmann, P. W. Barlow (eds.)
Actin is a very plentiful protein that includes a dynamic polymeric community found in all eukaryotic cells, often called the actin cytoskeleton. The constitution and serve as of the actin cytoskeleton, that is modulated by way of a plethora of actin-binding proteins, plays a various diversity of mobile roles. Well-documented capabilities for actin comprise: offering the molecular tracks for cytoplasmic streaming and organelle routine; formation of tethers that advisor the phone plate to the department web site in the course of cytokinesis; construction of honeycomb-like arrays that enmesh and immobilize plastids in exact subcellular styles; assisting the vesicle site visitors and cytoplasmic association crucial for the directional secretory mechanism that underpins tip progress of yes cells; and coordinating the flowery cytoplasmic responses to additional- and intracellular indications. the former twenty years have witnessed an enormous accumulation of knowledge when it comes to the mobile, biochemical, and molecular features of a lot of these basic mobile approaches. This triggered the editors to place jointly a various selection of themes, contributed via demonstrated overseas specialists, concerning the plant actin cytoskeleton. as the actin cytoskeleton impinges on a large number of methods severe for plant progress and improvement, in addition to for responses to the surroundings, the booklet might be priceless to any researcher, from the complicated undergraduate to the senior investigator, who's drawn to those parts of plant telephone biology.
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Extra info for Actin: A Dynamic Framework for Multiple Plant Cell Functions
Annu Rev Cell Dev BioI 13: 697-743 Fyrberg EA, Fyrberg CC, Briggs JR, Saville D, Beall CJ and Detchum A (1998) Functional nonequivalence of Drosophila actin isoforms. Biochem Genet 36: 271-287 Gibbon BC, Ren H and Staiger CJ (1997) Characterization of maize (Zea mays) pollen profilin function in vitro and in live cells . Biochem J 327 : 909-915 Gilliland LV, Asmussen MA, McKinney EC and Meagher RB (1998) Detection of deleterious genotypes in multi-generational studies: I. Disruptions in individual Arab idopsis actin genes .
1% of the population for each mutant. Thus, all three mutant alleles appear to be highly deleterious. These data deviated significantly from Mendelian segregation without selection, results that would only happen by chance once in 102 to 109 replicas of each segregation analysis experiment. By monitoring genotypes for four generations, the act2-1 mutant allele was found at normal frequencies in the F l , but significantly lower frequencies than expected in the F2 and F3 generations (Fig. 8A, solid lines).
1996). The important point to emerge from this 2. Myosins 31 analysis is that all the myosin genes identified from plants belong to unique classes which do not contain animal or protozoan myosins. 2. PLANT MYOSIN CLASS VIII The plant myosin class VIII contains so far seven myosin sequences, four of which are Arabidopsis myosins, two are Helianthus myosins and one is a Zea myosin. , 1994) of Arabidopsis thaliana, HaMYOl and HaMY03 of Helianthus annus (Vugrek & Menzel, 1997, unpublished results), and ZmZMM3 of Zea mays (Liu & Pesacreta, 1999, unpublished results) are between 1099 and 1166 aa in length and have a predicted heavy chain size of around 130 kDa.
Actin: A Dynamic Framework for Multiple Plant Cell Functions by Richard B. Meagher, Elizabeth C. McKinney (auth.), C. J. Staiger, F. Baluška, D. Volkmann, P. W. Barlow (eds.)