The condensin complex is a mechanochemical motor that translocates along DNA

Author:

Terekawa Tsuyoshi,Bisht Shveta,Eeftens Jorine M.,Dekker Cees,Haering Christian H.,Greene Eric C.

Abstract

One Sentence SummarySingle-molecule imaging reveals that eukaryotic condensin is a highly processive DNA-translocating motor complex.AbstractCondensin plays crucial roles in chromosome organization and compaction, but the mechanistic basis for its functions remains obscure. Here, we use single-molecule imaging to demonstrate that Saccharomyces cerevisiae condensin is a molecular motor capable of ATP hydrolysis-dependent translocation along double-stranded DNA. Condensin’s translocation activity is rapid and highly processive, with individual complexes traveling an average distance of ≥10 kilobases at a velocity of ∼60 base pairs per second. Our results suggest that condensin may take steps comparable in length to its ∼50-nanometer coiled-coil subunits, suggestive of a translocation mechanism that is distinct from any reported DNA motor protein. The finding that condensin is a mechanochemical motor has important implications for understanding the mechanisms of chromosome organization and condensation.

Publisher

Cold Spring Harbor Laboratory

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