Analysis of interatomic Contacts of Structural Units in PDB entry:
1IOK

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 1IOK entry

There are 7 chains in PDB entry 1IOK (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	ALA 2	PRO 526
B	ALA 2	PRO 526
C	ALA 2	PRO 526
D	ALA 2	PRO 526
E	ALA 2	PRO 526
F	ALA 2	PRO 526
G	ALA 2	PRO 526

There are147 helices in PDB entry 1IOK. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	9	28	Right-handed alpha
Helix 2	2	A	29	31	Right-handed 310
Helix 3	3	A	52	60	Right-handed alpha
Helix 4	4	A	64	81	Right-handed alpha
Helix 5	5	A	82	85	Right-handed 310
Helix 6	6	A	87	109	Right-handed alpha
Helix 7	7	A	112	133	Right-handed alpha
Helix 8	8	A	145	151	Right-handed alpha
Helix 9	9	A	155	170	Right-handed alpha
Helix 10	10	A	201	205	Right-handed 310
Helix 11	11	A	283	297	Right-handed alpha
Helix 12	12	A	338	354	Right-handed alpha
Helix 13	13	A	360	371	Right-handed alpha
Helix 14	14	A	385	410	Right-handed alpha
Helix 15	15	A	416	423	Right-handed alpha
Helix 16	16	A	424	428	Right-handed 310
Helix 17	17	A	433	447	Right-handed alpha
Helix 18	18	A	448	459	Right-handed alpha
Helix 19	19	A	461	471	Right-handed alpha
Helix 20	20	A	489	493	Right-handed alpha
Helix 21	21	A	498	517	Right-handed alpha
Helix 22	22	B	9	28	Right-handed alpha
Helix 23	23	B	29	31	Right-handed 310
Helix 24	24	B	52	60	Right-handed alpha
Helix 25	25	B	64	81	Right-handed alpha
Helix 26	26	B	82	85	Right-handed 310
Helix 27	27	B	87	109	Right-handed alpha
Helix 28	28	B	112	133	Right-handed alpha
Helix 29	29	B	145	151	Right-handed alpha
Helix 30	30	B	155	170	Right-handed alpha
Helix 31	31	B	201	205	Right-handed 310
Helix 32	32	B	283	297	Right-handed alpha
Helix 33	33	B	338	354	Right-handed alpha
Helix 34	34	B	360	371	Right-handed alpha
Helix 35	35	B	385	410	Right-handed alpha
Helix 36	36	B	416	423	Right-handed alpha
Helix 37	37	B	424	428	Right-handed 310
Helix 38	38	B	433	447	Right-handed alpha
Helix 39	39	B	448	459	Right-handed alpha
Helix 40	40	B	461	471	Right-handed alpha
Helix 41	41	B	489	493	Right-handed alpha
Helix 42	42	B	498	517	Right-handed alpha
Helix 43	43	C	9	28	Right-handed alpha
Helix 44	44	C	29	31	Right-handed 310
Helix 45	45	C	52	60	Right-handed alpha
Helix 46	46	C	64	81	Right-handed alpha
Helix 47	47	C	82	85	Right-handed 310
Helix 48	48	C	87	109	Right-handed alpha
Helix 49	49	C	112	133	Right-handed alpha
Helix 50	50	C	145	151	Right-handed alpha
Helix 51	51	C	155	170	Right-handed alpha
Helix 52	52	C	201	205	Right-handed 310
Helix 53	53	C	283	297	Right-handed alpha
Helix 54	54	C	338	354	Right-handed alpha
Helix 55	55	C	360	371	Right-handed alpha
Helix 56	56	C	385	410	Right-handed alpha
Helix 57	57	C	416	423	Right-handed alpha
Helix 58	58	C	424	428	Right-handed 310
Helix 59	59	C	433	447	Right-handed alpha
Helix 60	60	C	448	459	Right-handed alpha
Helix 61	61	C	461	471	Right-handed alpha
Helix 62	62	C	489	493	Right-handed alpha
Helix 63	63	C	498	517	Right-handed alpha
Helix 64	64	D	9	28	Right-handed alpha
Helix 65	65	D	29	31	Right-handed 310
Helix 66	66	D	52	60	Right-handed alpha
Helix 67	67	D	64	81	Right-handed alpha
Helix 68	68	D	82	85	Right-handed 310
Helix 69	69	D	87	109	Right-handed alpha
Helix 70	70	D	112	133	Right-handed alpha
Helix 71	71	D	145	151	Right-handed alpha
Helix 72	72	D	155	170	Right-handed alpha
Helix 73	73	D	201	205	Right-handed 310
Helix 74	74	D	283	297	Right-handed alpha
Helix 75	75	D	338	354	Right-handed alpha
Helix 76	76	D	360	371	Right-handed alpha
Helix 77	77	D	385	410	Right-handed alpha
Helix 78	78	D	416	423	Right-handed alpha
Helix 79	79	D	424	428	Right-handed 310
Helix 80	80	D	433	447	Right-handed alpha
Helix 81	81	D	448	459	Right-handed alpha
Helix 82	82	D	461	471	Right-handed alpha
Helix 83	83	D	489	493	Right-handed alpha
Helix 84	84	D	498	517	Right-handed alpha
Helix 85	85	E	9	28	Right-handed alpha
Helix 86	86	E	29	31	Right-handed 310
Helix 87	87	E	52	60	Right-handed alpha
Helix 88	88	E	64	81	Right-handed alpha
Helix 89	89	E	82	85	Right-handed 310
Helix 90	90	E	87	109	Right-handed alpha
Helix 91	91	E	112	133	Right-handed alpha
Helix 92	92	E	145	151	Right-handed alpha
Helix 93	93	E	155	170	Right-handed alpha
Helix 94	94	E	201	205	Right-handed 310
Helix 95	95	E	283	297	Right-handed alpha
Helix 96	96	E	338	354	Right-handed alpha
Helix 97	97	E	360	371	Right-handed alpha
Helix 98	98	E	385	410	Right-handed alpha
Helix 99	99	E	416	423	Right-handed alpha
Helix 100	100	E	424	428	Right-handed 310
Helix 101	101	E	433	447	Right-handed alpha
Helix 102	102	E	448	459	Right-handed alpha
Helix 103	103	E	461	471	Right-handed alpha
Helix 104	104	E	489	493	Right-handed alpha
Helix 105	105	E	498	517	Right-handed alpha
Helix 106	106	F	9	28	Right-handed alpha
Helix 107	107	F	29	31	Right-handed 310
Helix 108	108	F	52	60	Right-handed alpha
Helix 109	109	F	64	81	Right-handed alpha
Helix 110	110	F	82	85	Right-handed 310
Helix 111	111	F	87	109	Right-handed alpha
Helix 112	112	F	112	133	Right-handed alpha
Helix 113	113	F	145	151	Right-handed alpha
Helix 114	114	F	155	170	Right-handed alpha
Helix 115	115	F	201	205	Right-handed 310
Helix 116	116	F	283	297	Right-handed alpha
Helix 117	117	F	338	354	Right-handed alpha
Helix 118	118	F	360	371	Right-handed alpha
Helix 119	119	F	385	410	Right-handed alpha
Helix 120	120	F	416	423	Right-handed alpha
Helix 121	121	F	424	428	Right-handed 310
Helix 122	122	F	433	447	Right-handed alpha
Helix 123	123	F	448	459	Right-handed alpha
Helix 124	124	F	461	471	Right-handed alpha
Helix 125	125	F	489	493	Right-handed alpha
Helix 126	126	F	498	517	Right-handed alpha
Helix 127	127	G	9	28	Right-handed alpha
Helix 128	128	G	29	31	Right-handed 310
Helix 129	129	G	52	60	Right-handed alpha
Helix 130	130	G	64	81	Right-handed alpha
Helix 131	131	G	82	85	Right-handed 310
Helix 132	132	G	87	109	Right-handed alpha
Helix 133	133	G	112	133	Right-handed alpha
Helix 134	134	G	145	151	Right-handed alpha
Helix 135	135	G	155	170	Right-handed alpha
Helix 136	136	G	201	205	Right-handed 310
Helix 137	137	G	283	297	Right-handed alpha
Helix 138	138	G	338	354	Right-handed alpha
Helix 139	139	G	360	371	Right-handed alpha
Helix 140	140	G	385	410	Right-handed alpha
Helix 141	141	G	416	423	Right-handed alpha
Helix 142	142	G	424	428	Right-handed 310
Helix 143	143	G	433	447	Right-handed alpha
Helix 144	144	G	448	459	Right-handed alpha
Helix 145	145	G	461	471	Right-handed alpha
Helix 146	146	G	489	493	Right-handed alpha
Helix 147	147	G	498	517	Right-handed alpha

There are 35 sheets in PDB entry 1IOK. Click on sheet of interest to get list of strands forming it: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, AA, AB, AC, AD, AE, AF, AG, AH, AI,

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	4	8	first strand
Strand 2	A	518	524	anti-parallel
Strand 3	B	37	40	parallel
Strand 4	B	48	50	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	48	50	first strand
Strand 2	A	37	40	anti-parallel
Strand 3	G	518	524	parallel
Strand 4	G	4	8	anti-parallel

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There are 3 strands in C sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	178	179	first strand
Strand 2	A	376	381	parallel
Strand 3	A	186	190	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	193	194	first strand
Strand 2	A	330	333	anti-parallel
Strand 3	A	318	325	anti-parallel
Strand 4	A	213	222	anti-parallel
Strand 5	A	248	251	parallel
Strand 6	A	274	277	parallel

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There are 2 strands in E sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	411	413	first strand
Strand 2	A	495	497	anti-parallel

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There are 2 strands in F sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	477	480	first strand
Strand 2	A	485	488	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	4	8	first strand
Strand 2	B	518	524	anti-parallel
Strand 3	C	37	40	parallel
Strand 4	C	48	50	anti-parallel

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There are 3 strands in H sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	178	179	first strand
Strand 2	B	376	381	parallel
Strand 3	B	186	190	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	193	194	first strand
Strand 2	B	330	333	anti-parallel
Strand 3	B	318	325	anti-parallel
Strand 4	B	213	222	anti-parallel
Strand 5	B	248	251	parallel
Strand 6	B	274	277	parallel

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There are 2 strands in J sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	411	413	first strand
Strand 2	B	495	497	anti-parallel

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There are 2 strands in K sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	477	480	first strand
Strand 2	B	485	488	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	4	8	first strand
Strand 2	C	518	524	anti-parallel
Strand 3	D	37	40	parallel
Strand 4	D	48	50	anti-parallel

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There are 3 strands in M sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	178	179	first strand
Strand 2	C	376	381	parallel
Strand 3	C	186	190	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	193	194	first strand
Strand 2	C	330	333	anti-parallel
Strand 3	C	318	325	anti-parallel
Strand 4	C	213	222	anti-parallel
Strand 5	C	248	251	parallel
Strand 6	C	274	277	parallel

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There are 2 strands in O sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	411	413	first strand
Strand 2	C	495	497	anti-parallel

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There are 2 strands in P sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	477	480	first strand
Strand 2	C	485	488	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	4	8	first strand
Strand 2	D	518	524	anti-parallel
Strand 3	E	37	40	parallel
Strand 4	E	48	50	anti-parallel

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There are 3 strands in R sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	178	179	first strand
Strand 2	D	376	381	parallel
Strand 3	D	186	190	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	193	194	first strand
Strand 2	D	330	333	anti-parallel
Strand 3	D	318	325	anti-parallel
Strand 4	D	213	222	anti-parallel
Strand 5	D	248	251	parallel
Strand 6	D	274	277	parallel

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There are 2 strands in T sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	411	413	first strand
Strand 2	D	495	497	anti-parallel

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There are 2 strands in U sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	477	480	first strand
Strand 2	D	485	488	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	4	8	first strand
Strand 2	E	518	524	anti-parallel
Strand 3	F	37	40	parallel
Strand 4	F	48	50	anti-parallel

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There are 3 strands in W sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	178	179	first strand
Strand 2	E	376	381	parallel
Strand 3	E	186	190	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	193	194	first strand
Strand 2	E	330	333	anti-parallel
Strand 3	E	318	325	anti-parallel
Strand 4	E	213	222	anti-parallel
Strand 5	E	248	251	parallel
Strand 6	E	274	277	parallel

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There are 2 strands in Y sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	411	413	first strand
Strand 2	E	495	497	anti-parallel

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There are 2 strands in Z sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	477	480	first strand
Strand 2	E	485	488	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	4	8	first strand
Strand 2	F	518	524	anti-parallel
Strand 3	G	37	40	parallel
Strand 4	G	48	50	anti-parallel

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There are 3 strands in AB sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	178	179	first strand
Strand 2	F	376	381	parallel
Strand 3	F	186	190	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	193	194	first strand
Strand 2	F	330	333	anti-parallel
Strand 3	F	318	325	anti-parallel
Strand 4	F	213	222	anti-parallel
Strand 5	F	248	251	parallel
Strand 6	F	274	277	parallel

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There are 2 strands in AD sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	411	413	first strand
Strand 2	F	495	497	anti-parallel

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There are 2 strands in AE sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	477	480	first strand
Strand 2	F	485	488	anti-parallel

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There are 3 strands in AF sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	178	179	first strand
Strand 2	G	376	381	parallel
Strand 3	G	186	190	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	193	194	first strand
Strand 2	G	330	333	anti-parallel
Strand 3	G	318	325	anti-parallel
Strand 4	G	213	222	anti-parallel
Strand 5	G	248	251	parallel
Strand 6	G	274	277	parallel

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There are 2 strands in AH sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	411	413	first strand
Strand 2	G	495	497	anti-parallel

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There are 2 strands in AI sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	477	480	first strand
Strand 2	G	485	488	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: 1IOK

Analysis of interatomic Contacts of Structural Units in PDB entry:
1IOK