Analysis of interatomic Contacts of Structural Units in PDB entry:
25IK

Contacts of Structural Units (CSU) are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332).
This page provides analyses of contacts formed by:

chains
helices
sheets
residues

For analysis of ligand-protein contacts, use:

LPC software

3D structure can be seen in additional window with STING software for 25IK entry

There are 5 chains in PDB entry 25IK (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
R	ASP 6	GLY 284
A	VAL 5	VAL 246
B	SER 2	ASN 340
C	THR 6	ARG 62
S	ASP 1	LYS 236

There are 27 helices in PDB entry 25IK. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	AA1	R	34	60	Right-handed alpha
Helix 2	AA2	R	66	92	Right-handed alpha
Helix 3	AA3	R	93	95	Right-handed 310
Helix 4	AA4	R	101	136	Right-handed alpha
Helix 5	AA5	R	136	142	Right-handed alpha
Helix 6	AA6	R	147	171	Right-handed alpha
Helix 7	AA7	R	182	196	Right-handed alpha
Helix 8	AA8	R	198	216	Right-handed alpha
Helix 9	AA9	R	227	241	Right-handed alpha
Helix 10	AB1	R	242	254	Right-handed alpha
Helix 11	AB2	R	259	281	Right-handed alpha
Helix 12	AB3	A	6	32	Right-handed alpha
Helix 13	AB4	A	41	49	Right-handed 310
Helix 14	AB5	A	94	101	Right-handed 310
Helix 15	AB6	A	117	130	Right-handed alpha
Helix 16	AB7	A	145	155	Right-handed alpha
Helix 17	AB8	A	159	164	Right-handed alpha
Helix 18	AB9	A	164	169	Right-handed alpha
Helix 19	AC1	A	183	204	Right-handed alpha
Helix 20	AC2	A	222	243	Right-handed alpha
Helix 21	AC3	B	3	26	Right-handed alpha
Helix 22	AC4	B	29	34	Right-handed alpha
Helix 23	AC5	C	7	24	Right-handed alpha
Helix 24	AC6	C	29	44	Right-handed alpha
Helix 25	AC7	S	28	32	Right-handed 310
Helix 26	AC8	S	53	56	Right-handed 310
Helix 27	AC9	S	87	91	Right-handed 310

There are 12 sheets in PDB entry 25IK. Click on sheet of interest to get list of strands forming it: AA1, AA2, AA3, AA4, AA5, AA6, AA7, AA8, AA9, AB1, AB2, AB3,

There are 6 strands in AA1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	69	76	first strand
Strand 2	A	79	86	anti-parallel
Strand 3	A	33	39	parallel
Strand 4	A	105	111	parallel
Strand 5	A	138	144	parallel
Strand 6	A	211	215	parallel

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There are 4 strands in AA2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	47	51	first strand
Strand 2	B	336	339	anti-parallel
Strand 3	B	327	330	anti-parallel
Strand 4	B	317	320	anti-parallel

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There are 4 strands in AA3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	58	63	first strand
Strand 2	B	69	74	anti-parallel
Strand 3	B	78	83	anti-parallel
Strand 4	B	88	94	anti-parallel

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There are 4 strands in AA4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	100	105	first strand
Strand 2	B	111	116	anti-parallel
Strand 3	B	121	125	anti-parallel
Strand 4	B	134	139	anti-parallel

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There are 4 strands in AA5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	146	151	first strand
Strand 2	B	156	161	anti-parallel
Strand 3	B	166	170	anti-parallel
Strand 4	B	175	180	anti-parallel

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There are 4 strands in AA6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	187	192	first strand
Strand 2	B	198	203	anti-parallel
Strand 3	B	208	212	anti-parallel
Strand 4	B	218	222	anti-parallel

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There are 4 strands in AA7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	229	234	first strand
Strand 2	B	240	245	anti-parallel
Strand 3	B	250	254	anti-parallel
Strand 4	B	260	264	anti-parallel

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There are 4 strands in AA8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	273	278	first strand
Strand 2	B	284	289	anti-parallel
Strand 3	B	294	298	anti-parallel
Strand 4	B	304	308	anti-parallel

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There are 4 strands in AA9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	S	3	6	first strand
Strand 2	S	18	25	anti-parallel
Strand 3	S	78	83	anti-parallel
Strand 4	S	68	73	anti-parallel

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There are 6 strands in AB1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	S	10	12	first strand
Strand 2	S	110	119	parallel
Strand 3	S	93	99	anti-parallel
Strand 4	S	33	39	anti-parallel
Strand 5	S	45	51	anti-parallel
Strand 6	S	58	60	anti-parallel

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There are 4 strands in AB2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	S	128	129	first strand
Strand 2	S	143	149	anti-parallel
Strand 3	S	199	204	anti-parallel
Strand 4	S	191	196	anti-parallel

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There are 6 strands in AB3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	S	134	137	first strand
Strand 2	S	231	235	parallel
Strand 3	S	213	219	anti-parallel
Strand 4	S	162	167	anti-parallel
Strand 5	S	174	178	anti-parallel
Strand 6	S	182	183	anti-parallel

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Please mail questions/suggestions concerning this page to Vladimir.Sobolev@weizmann. ac.il

Analysis of interatomic Contacts of Structural Units in PDB entry: 25IK

Analysis of interatomic Contacts of Structural Units in PDB entry:
25IK