Analysis of interatomic Contacts of Structural Units in PDB entry:
3IKO

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 3IKO entry

There are 9 chains in PDB entry 3IKO (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	HIS 8	GLY 293
B	HIS 119	LEU 552
C	TYR 7	LEU 442
D	HIS 8	GLY 293
E	ASP 130	LEU 552
F	TYR 7	LEU 442
G	HIS 8	GLY 293
H	ASP 130	GLY 549
I	TYR 7	LEU 436

There are154 helices in PDB entry 3IKO. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	63	67	Right-handed 310
Helix 2	2	B	127	143	Right-handed alpha
Helix 3	3	B	181	185	Right-handed 310
Helix 4	4	B	186	196	Right-handed alpha
Helix 5	5	B	218	222	Right-handed 310
Helix 6	6	B	228	242	Right-handed alpha
Helix 7	7	B	252	287	Right-handed alpha
Helix 8	8	B	289	300	Right-handed alpha
Helix 9	9	B	302	313	Right-handed alpha
Helix 10	10	B	315	323	Right-handed alpha
Helix 11	11	B	329	344	Right-handed alpha
Helix 12	12	B	351	362	Right-handed alpha
Helix 13	13	B	371	378	Right-handed 310
Helix 14	14	B	380	391	Right-handed alpha
Helix 15	15	B	398	408	Right-handed alpha
Helix 16	16	B	416	427	Right-handed alpha
Helix 17	17	B	430	440	Right-handed alpha
Helix 18	18	B	446	459	Right-handed alpha
Helix 19	19	B	466	483	Right-handed alpha
Helix 20	20	B	486	496	Right-handed alpha
Helix 21	21	B	499	513	Right-handed alpha
Helix 22	22	B	514	515	Right-handed 310
Helix 23	23	B	516	520	Right-handed 310
Helix 24	24	B	521	529	Right-handed alpha
Helix 25	25	B	533	544	Right-handed alpha
Helix 26	26	C	7	10	Right-handed 310
Helix 27	27	C	11	24	Right-handed alpha
Helix 28	28	C	35	56	Right-handed alpha
Helix 29	29	C	60	88	Right-handed alpha
Helix 30	30	C	101	113	Right-handed alpha
Helix 31	31	C	113	129	Right-handed alpha
Helix 32	32	C	144	150	Right-handed alpha
Helix 33	33	C	159	164	Right-handed alpha
Helix 34	34	C	165	169	Right-handed 310
Helix 35	35	C	170	190	Right-handed alpha
Helix 36	36	C	192	203	Right-handed alpha
Helix 37	37	C	205	214	Right-handed alpha
Helix 38	38	C	224	228	Right-handed 310
Helix 39	39	C	239	253	Right-handed alpha
Helix 40	40	C	257	269	Right-handed alpha
Helix 41	41	C	273	278	Right-handed alpha
Helix 42	42	C	281	305	Right-handed alpha
Helix 43	43	C	309	313	Right-handed 310
Helix 44	44	C	323	335	Right-handed alpha
Helix 45	45	C	335	341	Right-handed alpha
Helix 46	46	C	343	352	Right-handed alpha
Helix 47	47	C	355	365	Right-handed alpha
Helix 48	48	C	382	400	Right-handed alpha
Helix 49	49	C	405	423	Right-handed alpha
Helix 50	50	C	425	427	Right-handed 310
Helix 51	51	C	428	434	Right-handed alpha
Helix 52	52	C	435	442	Right-handed 310
Helix 53	53	D	63	67	Right-handed 310
Helix 54	54	E	132	141	Right-handed alpha
Helix 55	55	E	181	185	Right-handed 310
Helix 56	56	E	186	196	Right-handed alpha
Helix 57	57	E	218	222	Right-handed 310
Helix 58	58	E	228	242	Right-handed alpha
Helix 59	59	E	252	287	Right-handed alpha
Helix 60	60	E	289	300	Right-handed alpha
Helix 61	61	E	302	313	Right-handed alpha
Helix 62	62	E	315	323	Right-handed alpha
Helix 63	63	E	329	344	Right-handed alpha
Helix 64	64	E	351	362	Right-handed alpha
Helix 65	65	E	372	378	Right-handed 310
Helix 66	66	E	380	391	Right-handed alpha
Helix 67	67	E	398	408	Right-handed alpha
Helix 68	68	E	416	427	Right-handed alpha
Helix 69	69	E	430	440	Right-handed alpha
Helix 70	70	E	446	459	Right-handed alpha
Helix 71	71	E	466	483	Right-handed alpha
Helix 72	72	E	486	496	Right-handed alpha
Helix 73	73	E	499	513	Right-handed alpha
Helix 74	74	E	514	515	Right-handed 310
Helix 75	75	E	516	520	Right-handed 310
Helix 76	76	E	521	529	Right-handed alpha
Helix 77	77	E	533	544	Right-handed alpha
Helix 78	78	F	11	24	Right-handed alpha
Helix 79	79	F	35	56	Right-handed alpha
Helix 80	80	F	58	87	Right-handed alpha
Helix 81	81	F	101	113	Right-handed alpha
Helix 82	82	F	113	129	Right-handed alpha
Helix 83	83	F	144	150	Right-handed alpha
Helix 84	84	F	159	164	Right-handed alpha
Helix 85	85	F	165	169	Right-handed 310
Helix 86	86	F	170	190	Right-handed alpha
Helix 87	87	F	192	203	Right-handed alpha
Helix 88	88	F	205	214	Right-handed alpha
Helix 89	89	F	224	228	Right-handed 310
Helix 90	90	F	239	253	Right-handed alpha
Helix 91	91	F	257	269	Right-handed alpha
Helix 92	92	F	273	278	Right-handed alpha
Helix 93	93	F	281	305	Right-handed alpha
Helix 94	94	F	309	313	Right-handed 310
Helix 95	95	F	323	335	Right-handed alpha
Helix 96	96	F	335	341	Right-handed alpha
Helix 97	97	F	343	352	Right-handed alpha
Helix 98	98	F	355	365	Right-handed alpha
Helix 99	99	F	382	400	Right-handed alpha
Helix 100	100	F	405	424	Right-handed alpha
Helix 101	101	F	425	427	Right-handed 310
Helix 102	102	F	428	434	Right-handed alpha
Helix 103	103	F	435	442	Right-handed 310
Helix 104	104	G	63	67	Right-handed 310
Helix 105	105	H	132	137	Right-handed alpha
Helix 106	106	H	181	185	Right-handed 310
Helix 107	107	H	186	196	Right-handed alpha
Helix 108	108	H	218	222	Right-handed 310
Helix 109	109	H	228	242	Right-handed alpha
Helix 110	110	H	252	287	Right-handed alpha
Helix 111	111	H	289	300	Right-handed alpha
Helix 112	112	H	302	313	Right-handed alpha
Helix 113	113	H	315	323	Right-handed alpha
Helix 114	114	H	329	344	Right-handed alpha
Helix 115	115	H	351	362	Right-handed alpha
Helix 116	116	H	371	378	Right-handed 310
Helix 117	117	H	380	391	Right-handed alpha
Helix 118	118	H	398	408	Right-handed alpha
Helix 119	119	H	416	427	Right-handed alpha
Helix 120	120	H	430	440	Right-handed alpha
Helix 121	121	H	446	459	Right-handed alpha
Helix 122	122	H	466	483	Right-handed alpha
Helix 123	123	H	486	496	Right-handed alpha
Helix 124	124	H	499	513	Right-handed alpha
Helix 125	125	H	514	515	Right-handed 310
Helix 126	126	H	516	520	Right-handed 310
Helix 127	127	H	521	529	Right-handed alpha
Helix 128	128	H	533	544	Right-handed alpha
Helix 129	129	I	10	24	Right-handed alpha
Helix 130	130	I	25	29	Right-handed 310
Helix 131	131	I	35	56	Right-handed alpha
Helix 132	132	I	60	86	Right-handed alpha
Helix 133	133	I	101	113	Right-handed alpha
Helix 134	134	I	113	129	Right-handed alpha
Helix 135	135	I	144	150	Right-handed alpha
Helix 136	136	I	159	164	Right-handed alpha
Helix 137	137	I	165	169	Right-handed 310
Helix 138	138	I	170	190	Right-handed alpha
Helix 139	139	I	192	203	Right-handed alpha
Helix 140	140	I	205	214	Right-handed alpha
Helix 141	141	I	224	228	Right-handed 310
Helix 142	142	I	239	253	Right-handed alpha
Helix 143	143	I	257	269	Right-handed alpha
Helix 144	144	I	273	278	Right-handed alpha
Helix 145	145	I	281	305	Right-handed alpha
Helix 146	146	I	309	313	Right-handed 310
Helix 147	147	I	323	335	Right-handed alpha
Helix 148	148	I	335	341	Right-handed alpha
Helix 149	149	I	343	353	Right-handed alpha
Helix 150	150	I	355	366	Right-handed alpha
Helix 151	151	I	382	400	Right-handed alpha
Helix 152	152	I	405	422	Right-handed alpha
Helix 153	153	I	425	427	Right-handed 310
Helix 154	154	I	428	434	Right-handed alpha

There are 33 sheets in PDB entry 3IKO. 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,

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	12	17	first strand
Strand 2	A	23	28	anti-parallel
Strand 3	A	32	37	anti-parallel
Strand 4	A	44	45	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	12	17	first strand
Strand 2	A	23	28	anti-parallel
Strand 3	A	32	37	anti-parallel
Strand 4	A	49	50	anti-parallel

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There are 4 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	56	58	first strand
Strand 2	A	69	74	anti-parallel
Strand 3	A	79	85	anti-parallel
Strand 4	A	88	89	anti-parallel

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There are 4 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	56	58	first strand
Strand 2	A	69	74	anti-parallel
Strand 3	A	79	85	anti-parallel
Strand 4	A	93	95	anti-parallel

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There are 4 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	102	105	first strand
Strand 2	A	118	120	anti-parallel
Strand 3	A	124	126	anti-parallel
Strand 4	A	141	142	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	129	130	first strand
Strand 2	A	136	137	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	A	148	153	first strand
Strand 2	A	172	177	anti-parallel
Strand 3	A	181	186	anti-parallel
Strand 4	A	195	201	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	223	225	first strand
Strand 2	A	231	233	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	257	262	first strand
Strand 2	A	269	273	anti-parallel
Strand 3	A	278	283	anti-parallel
Strand 4	A	289	291	anti-parallel

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There are 3 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	151	153	first strand
Strand 2	B	159	163	anti-parallel
Strand 3	B	169	170	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	197	199	first strand
Strand 2	B	210	213	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	D	12	17	first strand
Strand 2	D	23	28	anti-parallel
Strand 3	D	32	37	anti-parallel
Strand 4	D	44	45	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	12	17	first strand
Strand 2	D	23	28	anti-parallel
Strand 3	D	32	37	anti-parallel
Strand 4	D	49	50	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	56	58	first strand
Strand 2	D	69	74	anti-parallel
Strand 3	D	79	85	anti-parallel
Strand 4	D	88	89	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	56	58	first strand
Strand 2	D	69	74	anti-parallel
Strand 3	D	79	85	anti-parallel
Strand 4	D	93	95	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	102	105	first strand
Strand 2	D	118	120	anti-parallel
Strand 3	D	124	126	anti-parallel
Strand 4	D	141	142	anti-parallel

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There are 2 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	129	130	first strand
Strand 2	D	136	137	anti-parallel

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There are 4 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	148	153	first strand
Strand 2	D	172	177	anti-parallel
Strand 3	D	181	186	anti-parallel
Strand 4	D	195	201	anti-parallel

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There are 2 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	223	225	first strand
Strand 2	D	231	233	anti-parallel

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There are 4 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	257	262	first strand
Strand 2	D	269	273	anti-parallel
Strand 3	D	278	283	anti-parallel
Strand 4	D	289	291	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	151	153	first strand
Strand 2	E	159	163	anti-parallel
Strand 3	E	169	170	anti-parallel

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There are 2 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	197	199	first strand
Strand 2	E	210	213	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	12	17	first strand
Strand 2	G	23	28	anti-parallel
Strand 3	G	32	37	anti-parallel
Strand 4	G	44	45	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	12	17	first strand
Strand 2	G	23	28	anti-parallel
Strand 3	G	32	37	anti-parallel
Strand 4	G	49	50	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	56	58	first strand
Strand 2	G	69	74	anti-parallel
Strand 3	G	79	85	anti-parallel
Strand 4	G	88	89	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	56	58	first strand
Strand 2	G	69	74	anti-parallel
Strand 3	G	79	85	anti-parallel
Strand 4	G	93	95	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	G	102	105	first strand
Strand 2	G	118	120	anti-parallel
Strand 3	G	124	126	anti-parallel
Strand 4	G	141	142	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	129	130	first strand
Strand 2	G	136	137	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	148	153	first strand
Strand 2	G	172	177	anti-parallel
Strand 3	G	181	186	anti-parallel
Strand 4	G	195	201	anti-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	G	223	225	first strand
Strand 2	G	231	233	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	257	262	first strand
Strand 2	G	269	273	anti-parallel
Strand 3	G	278	283	anti-parallel
Strand 4	G	289	291	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	H	151	153	first strand
Strand 2	H	159	163	anti-parallel
Strand 3	H	169	170	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	197	199	first strand
Strand 2	H	210	213	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: 3IKO

Analysis of interatomic Contacts of Structural Units in PDB entry:
3IKO