[ccp4bb]: how to retrieve structural info. from the local base-pair parameters?

["Q. Steven Xu" <qian@med-biophg.bu.edu>]

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I used the CURVES and X3DNA to perform structure analysis on a DNA
molecule and got detailed base-pair parameters like slide, rise, tilt,
roll, etc. But those valuses don't make much sense to me since i have no
experience on DNA structure although I do know what those parameters mean.
My question is how I can tell from those parameters if the DNA is bended,
if there is any unstacking base pair, if DNA is somewhat unwinding or
whatever questions like these. Is there any quantitative criteria for
these parameters or just qualitative ones to make judgements?

Any comments, references, tutorials are welcome. Many thanks.

regards,
Steve