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Nucleosome mobilization and positioning by ISWI-containing chromatin-remodeling factors

Gernot Längst and Peter B. Becker*

Adolf-Butenandt-Institut, Schillerstraße 44, München 80336, Germany
* Author for correspondence (e-mail: Peter.Becker{at}mol-bio.med.uni-muenchen.de )



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  		Fig. 1. The nucleosome modeled according to the 2.8 crystal structure (Luger et al., 1997Go).

 


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  		Fig. 2. Domain structure of the SWI2/SNF2-, ISWI- and Mi-2 types of nucleosome-remodeling ATPase.

 


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  		Fig. 3. Summary of the known ISWI-containing nucleosome-remodeling complexes. The known subunits are represented as spheres; protein families are indicated by colour coding. References: NURF (Tsukiyama et al., 1995Go); dCHRAC (Varga-Weisz et al., 1997Go); dACF (Ito et al., 1997Go); WCRF/hACF (Bochar et al., 1999; LeRoy et al., 2000Go); h CHRAC (Poot et al., 2000Go); RSF (LeRoy et al., 1998Go); ISW1 and ISW2 (Tsukiyama et al., 1999Go); Xenopus complexes (Guschin et al., 2000aGo).

 


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  		Fig. 4. The processes that ISWI-containing factors are known to be involved in. Graphics by Petra Riedinger/Volker Wiersdorf, EMBL.

 


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  		Fig. 5. The essential features of the three distinct models (spooling, twisting and bulging) for nucleosome mobility (see text).

 


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  		Fig. 6. Summary of contact points on the nucleosome for the nucleosome-remodeling ATPases listed in Fig. 2.

 

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