Table 1.

The fractions of the secondary structure elements obtained from the crystal structures with programs DSSP³³ and BeStSel³⁴ or calculated from the SRCD spectra of the reference protein databases^35, 36 by BeStSel, 34 the CDPro program package, 37 and CDNN program 38

Protein	Data		α‐Helix	β‐Sheet	Turn	Unordered
NColE7	SRCD	CDPro	0.32	0.16	0.20	0.32
		CDNN	0.30	0.26	0.20	0.24
		BeStSel	0.20	0.21	0.16	0.43
	SRCD (with Zn2+)	CDPro	0.28	0.24	0.21	0.27
		CDNN	0.29	0.26	0.20	0.25
		BeStSel	0.16	0.24	0.16	0.44
	PDB id: 1M08 (with Zn2+)	DSSP	0.38	0.17	0.15	0.31
		BeStSel	0.31	0.11	0.15	0.44
	PDB id: 1PT3 (with 8bp DNA)		0.39	0.17	0.12	0.32
	SRCD (with Im7)a	CDPro	0.35	0.28	0.13	0.24
		CDNN	0.31	0.23	0.19	0.27
		BeStSel	0.19	0.25	0.16	0.40
	PDB id: 7CEI (with Im7 and Zn2+)		0.30	0.15	0.12	0.43
	PDB id: 1MZ8 (with Im7 and Zn2+)		0.36	0.17	0.20	0.27
	PDB id: 2ERH (with Im7b)		0.32	0.17	0.15	0.36
Im7	SRCD	CDPro	0.43	0.12	0.19	0.26
		CDNN	0.44	0.15	0.18	0.23
		BeStSel	0.36	0.15	0.14	0.34
	PDB id: 1CEI	DSSP	0.52	0.02	0.10	0.36
		BeStSel	0.48	0.00	0.11	0.41
	SRCD (with NColE7)a	CDPro	0.53	0.2	0.14	0.13
		CDNN	0.46	0.13	0.17	0.23
		BeStSel	0.34	0.25	0.13	0.28
	PDB id: 1M08 (with NColE7)		0.53	0.00	0.09	0.38
	PDB id: 7CEI (with NColE7)		0.46	0.00	0.16	0.38
	PDB id: 2ERH (with NColE7b)		0.52	0.02	0.10	0.36

^aThe mathematical difference of the spectra of the mixtures and individual proteins were applied in the secondary structure determination. The result is distorted, as the fitted protein is supposed to suffer of all the conformational changes occurred in the protein complex.

^bProteins with redesigned interaction interface.