Crowding-induced structural alterations of random-loop chromosome model.
نویسندگان
چکیده
We investigate structural alterations of random-loop polymers due to changes in the crowding condition, as a model to study environmental effects on the structure of chromosome subcompartments. The polymer structure is changed in a nonmonotonic fashion with an increasing density of crowders: condensed at small volume fractions; decondensed at high crowding volume fractions. The nonmonotonic behavior is a manifestation of the nontrivial distance dependence of the depletion interactions. We also show that crowding-induced structural alterations affect the access of binding proteins to the surface of polymer segments and are distinguished from structural changes due to the increased number of specific polymer loops.
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ورودعنوان ژورنال:
- Physical review letters
دوره 106 16 شماره
صفحات -
تاریخ انتشار 2011