possible ugly workaround: renumber the pdb file so where ccp4mg thinks the N and C-termini are is hidden in the image you are making (if possible) if you want to make different views you may need to make differently renumbered pdb files.
(but probably other people have a smarter way)
as an aside, PyMol I think does not have these problems, at least we make images of cyclic peptides with it and I haven't run into it.

Quoting "SANCHEZ BARRENA, MARIA JOSE":

Dear all,
I am working with a cyclic protein and I am trying to make a figure with ccp4mg. I would like to know how to say to ccp4mg that the N and C-terminus are bound.... Although atoms are at a covalent bond distance, the chain is broken by ccp4mg...
Many thanks in advance for your suggestions and help!
Maria



Mark J van Raaij
Laboratorio M-4
Dpto de Estructura de Macromoléculas
Centro Nacional de BiotecnologĂ­a - CSIC
c/Darwin 3, Campus Cantoblanco
28049 Madrid
tel. 91 585 4616
email: [email protected]

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