DNA packaging motor

Other RNA structures include the RNA claw from the DNA packaging motor from bacteriophage (p29/ the conformation of an RNA structural switch/ structures of miRNA/ the structure of the A730 loop from the Neurospora VS ribozyme/ structures or rRNA, the structure of RNA containing an internal UU loop from myotonic dystrophy type base pair opening found in the adenine tract of an RNA... 

Fig. 13.1. The packaging motor of the bacteriophage

In addition to the ability to apply opposing forces to the packaging motor, this optical tweezers assay allows the length of DNA remaining outside of the... 

Optical tweezers have since been used to stretch and even unwind DNA unfold the tertiary structure of proteins pull on DNA processing enzymes like RNA polymerase as it walks along DNA resist the force produced by viral capsid packaging motors and manipulate entire mammalian cells, sperms and sub-cellular organelles and vesicles. The applications are manifold and the future possibilities are great. 

Smith, D.E., Tans, S.J., Smith, S.B., Grimes, S., Anderson, D.L., and Bustamante, C. (2001) The bacteriophage straight 029 portal motor can package DNA against a large internal force. Nature... 

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