(none)

[Li Songlin]

Dear All,

Could we calculate the angles between any two helix in a protein using
XPLOR? And how?

Regards,

Songlin Li.




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Are you intent on using X-PLOR? If not, I think that
the groups that have recently calculated structures of
Ca++ binding proteins have programs to calculate 
interhelical angles. 

For descriptions of applications, see: 



A program from Ikura's group:

Gagne et al., Nature Struct. Biol. 2, 784 (1995)

Finn et al., Nature Struct. Biol. 2, 777 (1995)




A program by J. Theaker based on a protocol by Chothia (JMB 145, 215):

Potts et al., Nature Struct. Biol. 2, 790 (1995)

Apparently this program is not freely available. I would suggest contacting
Ikura's group for their program. 

Prof. Mitsu Ikura: (416) 924-0671 ext 2025
if their web pages are up to date.

Brian