Analysis of interatomic Contacts of Structural Units in PDB entry:
4IOA

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 4IOA entry

There are 30 chains in PDB entry 4IOA (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
X	G 1	A 2877
Y	C 2	U 123
A	LEU 33	THR 272
B	MET 1	SER 205
C	ALA 2	GLU 198
D	GLN 3	LYS 179
E	GLY 5	LYS 175
F	MET 74	ALA 144
G	LYS 30	LEU 171
H	MET 1	LEU 134
I	HIS 4	GLU 144
J	LYS 6	ALA 141
K	HIS 3	LEU 115
L	ARG 8	GLY 111
M	GLN 2	GLU 109
N	PRO 2	GLN 118
O	ILE 5	ILE 98
P	PHE 8	LYS 134
Q	SER 2	GLN 94
R	PRO 4	THR 113
S	MET 1	ARG 175
T	ALA 2	GLN 85
U	THR 8	GLU 79
V	MET 1	GLN 66
W	MET 1	GLU 55
Z	ALA 2	ALA 59
1	ALA 2	LYS 54
2	MET 1	ASP 46
3	PRO 2	ARG 64
4	MET 1	GLY 37

There are 72 helices in PDB entry 4IOA. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	69	73	Right-handed 310
Helix 2	2	A	222	226	Right-handed 310
Helix 3	3	A	261	265	Right-handed 310
Helix 4	4	B	55	59	Right-handed 310
Helix 5	5	B	60	69	Right-handed alpha
Helix 6	6	B	115	121	Right-handed alpha
Helix 7	7	C	23	39	Right-handed alpha
Helix 8	8	C	96	112	Right-handed alpha
Helix 9	9	C	130	140	Right-handed alpha
Helix 10	10	C	154	159	Right-handed alpha
Helix 11	11	C	176	183	Right-handed alpha
Helix 12	12	D	5	13	Right-handed alpha
Helix 13	13	D	46	61	Right-handed alpha
Helix 14	14	D	93	106	Right-handed alpha
Helix 15	15	D	142	146	Right-handed 310
Helix 16	16	D	162	173	Right-handed alpha
Helix 17	17	E	59	81	Right-handed alpha
Helix 18	18	E	137	152	Right-handed alpha
Helix 19	19	F	75	83	Right-handed alpha
Helix 20	20	F	101	103	Right-handed 310
Helix 21	21	F	104	109	Right-handed alpha
Helix 22	22	F	120	125	Right-handed alpha
Helix 23	23	F	127	135	Right-handed alpha
Helix 24	24	G	50	64	Right-handed alpha
Helix 25	25	G	84	88	Right-handed 310
Helix 26	26	G	122	134	Right-handed alpha
Helix 27	27	G	138	145	Right-handed alpha
Helix 28	28	G	157	161	Right-handed 310
Helix 29	29	H	116	121	Right-handed alpha
Helix 30	30	H	123	130	Right-handed alpha
Helix 31	31	I	77	81	Right-handed alpha
Helix 32	32	I	126	134	Right-handed alpha
Helix 33	33	J	45	59	Right-handed alpha
Helix 34	34	J	111	125	Right-handed alpha
Helix 35	35	K	13	32	Right-handed alpha
Helix 36	36	K	38	56	Right-handed alpha
Helix 37	37	K	59	68	Right-handed alpha
Helix 38	38	K	72	82	Right-handed alpha
Helix 39	39	K	82	87	Right-handed alpha
Helix 40	40	L	9	19	Right-handed alpha
Helix 41	41	L	20	25	Right-handed alpha
Helix 42	42	L	67	81	Right-handed alpha
Helix 43	43	L	98	109	Right-handed alpha
Helix 44	44	M	8	19	Right-handed alpha
Helix 45	45	M	60	63	Right-handed 310
Helix 46	46	M	104	109	Right-handed 310
Helix 47	47	N	8	21	Right-handed alpha
Helix 48	48	N	25	30	Right-handed 310
Helix 49	49	N	31	70	Right-handed alpha
Helix 50	50	N	71	73	Right-handed 310
Helix 51	51	N	75	86	Right-handed alpha
Helix 52	52	N	94	102	Right-handed alpha
Helix 53	53	N	102	118	Right-handed alpha
Helix 54	54	P	10	18	Right-handed alpha
Helix 55	55	P	34	46	Right-handed alpha
Helix 56	56	P	49	58	Right-handed alpha
Helix 57	57	P	64	82	Right-handed alpha
Helix 58	58	P	86	88	Right-handed 310
Helix 59	59	P	110	112	Right-handed 310
Helix 60	60	Q	13	21	Right-handed alpha
Helix 61	61	Q	34	47	Right-handed alpha
Helix 62	62	S	10	15	Right-handed alpha
Helix 63	63	S	36	47	Right-handed alpha
Helix 64	64	U	63	68	Right-handed alpha
Helix 65	65	V	3	7	Right-handed 310
Helix 66	66	V	11	34	Right-handed alpha
Helix 67	67	V	40	63	Right-handed alpha
Helix 68	68	W	13	23	Right-handed alpha
Helix 69	69	W	37	47	Right-handed alpha
Helix 70	70	Z	12	20	Right-handed alpha
Helix 71	71	Z	21	23	Right-handed 310
Helix 72	72	4	29	32	Right-handed 310

There are 39 sheets in PDB entry 4IOA. 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, AJ, AK, AL, AM,

There are 2 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	37	38	first strand
Strand 2	A	61	62	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	102	106	first strand
Strand 2	A	92	97	anti-parallel
Strand 3	A	76	83	anti-parallel
Strand 4	A	116	118	anti-parallel

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There are 6 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	192	193	first strand
Strand 2	A	141	143	anti-parallel
Strand 3	A	163	168	anti-parallel
Strand 4	A	173	176	anti-parallel
Strand 5	A	182	185	anti-parallel
Strand 6	A	267	268	anti-parallel

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There are 7 strands in D sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	3	16	first strand
Strand 2	B	19	27	anti-parallel
Strand 3	B	181	185	anti-parallel
Strand 4	B	164	176	anti-parallel
Strand 5	B	101	107	anti-parallel
Strand 6	B	195	200	anti-parallel
Strand 7	B	3	16	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	33	37	first strand
Strand 2	B	46	50	anti-parallel
Strand 3	B	78	82	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	B	113	114	first strand
Strand 2	B	158	159	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	C	116	117	first strand
Strand 2	C	185	187	parallel
Strand 3	C	148	151	parallel
Strand 4	C	167	170	parallel

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There are 5 strands in H sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	66	69	first strand
Strand 2	D	84	91	anti-parallel
Strand 3	D	31	38	anti-parallel
Strand 4	D	152	158	anti-parallel
Strand 5	D	128	132	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	16	18	first strand
Strand 2	E	25	27	anti-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	E	42	44	first strand
Strand 2	E	51	53	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	121	124	first strand
Strand 2	E	130	135	anti-parallel
Strand 3	E	83	90	anti-parallel
Strand 4	E	161	164	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	95	99	first strand
Strand 2	E	102	106	anti-parallel
Strand 3	E	113	115	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	97	98	first strand
Strand 2	F	136	137	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	41	45	first strand
Strand 2	G	79	83	parallel
Strand 3	G	148	150	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	G	99	100	first strand
Strand 2	G	114	115	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	7	10	first strand
Strand 2	H	16	24	anti-parallel
Strand 3	H	50	58	anti-parallel
Strand 4	H	69	76	anti-parallel
Strand 5	H	95	99	anti-parallel
Strand 6	H	7	10	parallel

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There are 7 strands in Q sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	81	82	first strand
Strand 2	H	88	91	anti-parallel
Strand 3	M	75	82	anti-parallel
Strand 4	M	65	72	anti-parallel
Strand 5	M	46	58	anti-parallel
Strand 6	M	32	38	anti-parallel
Strand 7	M	88	93	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	I	73	76	first strand
Strand 2	I	106	109	parallel
Strand 3	I	124	125	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	I	118	120	first strand
Strand 2	I	138	140	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	J	65	67	first strand
Strand 2	J	103	107	anti-parallel
Strand 3	J	33	37	anti-parallel
Strand 4	J	130	133	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	J	41	44	first strand
Strand 2	J	93	98	anti-parallel
Strand 3	J	73	75	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	33	37	first strand
Strand 2	K	109	114	anti-parallel
Strand 3	K	96	102	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	L	41	43	first strand
Strand 2	L	27	30	anti-parallel
Strand 3	L	87	90	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	O	17	21	first strand
Strand 2	O	89	95	anti-parallel
Strand 3	O	56	65	anti-parallel
Strand 4	O	32	34	anti-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	O	38	39	first strand
Strand 2	O	46	47	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	O	69	75	first strand
Strand 2	O	80	86	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	P	25	31	first strand
Strand 2	P	122	130	anti-parallel
Strand 3	P	90	99	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	P	103	108	first strand
Strand 2	P	114	119	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	Q	9	10	first strand
Strand 2	Q	24	28	anti-parallel
Strand 3	Q	75	82	anti-parallel
Strand 4	Q	50	58	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	R	21	23	first strand
Strand 2	R	33	40	anti-parallel
Strand 3	R	45	48	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	R	52	56	first strand
Strand 2	R	69	73	anti-parallel

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There are 5 strands in AF sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	S	31	35	first strand
Strand 2	S	18	24	anti-parallel
Strand 3	S	78	85	parallel
Strand 4	S	61	71	anti-parallel
Strand 5	S	51	55	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	S	119	122	first strand
Strand 2	S	94	101	anti-parallel
Strand 3	S	134	137	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	S	112	115	first strand
Strand 2	S	167	172	anti-parallel
Strand 3	S	146	148	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	T	22	23	first strand
Strand 2	T	36	39	anti-parallel
Strand 3	T	59	61	anti-parallel
Strand 4	T	51	53	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	T	30	31	first strand
Strand 2	T	65	71	anti-parallel
Strand 3	T	77	81	anti-parallel
Strand 4	T	46	47	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	W	31	33	first strand
Strand 2	W	2	5	anti-parallel
Strand 3	W	51	53	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	Z	30	33	first strand
Strand 2	Z	37	41	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	4	2	3	first strand
Strand 2	4	34	35	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: 4IOA

Analysis of interatomic Contacts of Structural Units in PDB entry:
4IOA