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

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 3SOM entry

There are 16 chains in PDB entry 3SOM (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	LYS 4	ARG 230
B	PRO 3	ARG 230
C	LYS 4	LEU 231
D	GLU 2	ARG 230
E	LYS 4	LEU 233
F	PRO 3	ARG 230
G	PRO 3	ARG 230
H	LYS 4	ARG 230
I	PRO 3	ARG 230
J	LYS 4	ARG 230
K	LYS 4	ARG 230
L	PRO 3	LEU 233
M	GLU 2	ALA 232
N	LYS 4	GLY 235
O	LYS 4	LEU 231
P	GLU 2	LEU 231

There are207 helices in PDB entry 3SOM. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	4	17	Right-handed alpha
Helix 2	2	A	28	33	Right-handed alpha
Helix 3	3	A	34	35	Right-handed 310
Helix 4	4	A	36	40	Right-handed 310
Helix 5	5	A	57	62	Right-handed alpha
Helix 6	6	A	62	67	Right-handed alpha
Helix 7	7	A	77	94	Right-handed alpha
Helix 8	8	A	116	124	Right-handed alpha
Helix 9	9	A	131	135	Right-handed 310
Helix 10	10	A	185	200	Right-handed alpha
Helix 11	11	A	201	208	Right-handed 310
Helix 12	12	A	216	225	Right-handed alpha
Helix 13	13	A	226	230	Right-handed 310
Helix 14	14	B	3	17	Right-handed alpha
Helix 15	15	B	28	33	Right-handed alpha
Helix 16	16	B	34	35	Right-handed 310
Helix 17	17	B	36	40	Right-handed 310
Helix 18	18	B	57	62	Right-handed alpha
Helix 19	19	B	62	68	Right-handed alpha
Helix 20	20	B	77	94	Right-handed alpha
Helix 21	21	B	116	124	Right-handed alpha
Helix 22	22	B	131	135	Right-handed 310
Helix 23	23	B	185	200	Right-handed alpha
Helix 24	24	B	201	208	Right-handed 310
Helix 25	25	B	216	225	Right-handed alpha
Helix 26	26	B	226	230	Right-handed 310
Helix 27	27	C	4	17	Right-handed alpha
Helix 28	28	C	28	33	Right-handed alpha
Helix 29	29	C	34	35	Right-handed 310
Helix 30	30	C	36	40	Right-handed 310
Helix 31	31	C	57	62	Right-handed alpha
Helix 32	32	C	62	70	Right-handed alpha
Helix 33	33	C	77	94	Right-handed alpha
Helix 34	34	C	116	124	Right-handed alpha
Helix 35	35	C	131	135	Right-handed 310
Helix 36	36	C	185	200	Right-handed alpha
Helix 37	37	C	201	209	Right-handed 310
Helix 38	38	C	216	225	Right-handed alpha
Helix 39	39	C	226	230	Right-handed 310
Helix 40	40	D	3	17	Right-handed alpha
Helix 41	41	D	28	33	Right-handed alpha
Helix 42	42	D	34	35	Right-handed 310
Helix 43	43	D	36	40	Right-handed 310
Helix 44	44	D	57	62	Right-handed alpha
Helix 45	45	D	62	70	Right-handed alpha
Helix 46	46	D	77	94	Right-handed alpha
Helix 47	47	D	116	124	Right-handed alpha
Helix 48	48	D	131	135	Right-handed 310
Helix 49	49	D	185	200	Right-handed alpha
Helix 50	50	D	201	208	Right-handed 310
Helix 51	51	D	216	225	Right-handed alpha
Helix 52	52	D	226	230	Right-handed 310
Helix 53	53	E	4	17	Right-handed alpha
Helix 54	54	E	28	33	Right-handed alpha
Helix 55	55	E	34	35	Right-handed 310
Helix 56	56	E	36	40	Right-handed 310
Helix 57	57	E	57	62	Right-handed alpha
Helix 58	58	E	62	70	Right-handed alpha
Helix 59	59	E	77	94	Right-handed alpha
Helix 60	60	E	116	124	Right-handed alpha
Helix 61	61	E	131	135	Right-handed 310
Helix 62	62	E	185	200	Right-handed alpha
Helix 63	63	E	201	208	Right-handed 310
Helix 64	64	E	216	225	Right-handed alpha
Helix 65	65	E	226	231	Right-handed alpha
Helix 66	66	F	3	17	Right-handed alpha
Helix 67	67	F	28	33	Right-handed alpha
Helix 68	68	F	34	35	Right-handed 310
Helix 69	69	F	36	40	Right-handed 310
Helix 70	70	F	57	62	Right-handed alpha
Helix 71	71	F	62	70	Right-handed alpha
Helix 72	72	F	77	94	Right-handed alpha
Helix 73	73	F	116	124	Right-handed alpha
Helix 74	74	F	131	135	Right-handed 310
Helix 75	75	F	185	199	Right-handed alpha
Helix 76	76	F	200	208	Right-handed 310
Helix 77	77	F	216	224	Right-handed alpha
Helix 78	78	F	226	230	Right-handed 310
Helix 79	79	G	3	17	Right-handed alpha
Helix 80	80	G	28	34	Right-handed alpha
Helix 81	81	G	35	40	Right-handed 310
Helix 82	82	G	57	62	Right-handed alpha
Helix 83	83	G	62	67	Right-handed alpha
Helix 84	84	G	77	94	Right-handed alpha
Helix 85	85	G	116	124	Right-handed alpha
Helix 86	86	G	131	135	Right-handed 310
Helix 87	87	G	185	200	Right-handed alpha
Helix 88	88	G	201	208	Right-handed 310
Helix 89	89	G	216	225	Right-handed alpha
Helix 90	90	G	226	230	Right-handed 310
Helix 91	91	H	4	17	Right-handed alpha
Helix 92	92	H	28	33	Right-handed alpha
Helix 93	93	H	34	35	Right-handed 310
Helix 94	94	H	36	40	Right-handed 310
Helix 95	95	H	57	62	Right-handed alpha
Helix 96	96	H	62	67	Right-handed alpha
Helix 97	97	H	77	94	Right-handed alpha
Helix 98	98	H	116	124	Right-handed alpha
Helix 99	99	H	131	135	Right-handed 310
Helix 100	100	H	185	200	Right-handed alpha
Helix 101	101	H	201	208	Right-handed 310
Helix 102	102	H	216	225	Right-handed alpha
Helix 103	103	H	226	230	Right-handed 310
Helix 104	104	I	3	17	Right-handed alpha
Helix 105	105	I	28	33	Right-handed alpha
Helix 106	106	I	34	35	Right-handed 310
Helix 107	107	I	36	40	Right-handed 310
Helix 108	108	I	57	62	Right-handed alpha
Helix 109	109	I	62	67	Right-handed alpha
Helix 110	110	I	77	94	Right-handed alpha
Helix 111	111	I	116	124	Right-handed alpha
Helix 112	112	I	131	135	Right-handed 310
Helix 113	113	I	185	200	Right-handed alpha
Helix 114	114	I	201	208	Right-handed 310
Helix 115	115	I	216	225	Right-handed alpha
Helix 116	116	I	226	230	Right-handed 310
Helix 117	117	J	4	17	Right-handed alpha
Helix 118	118	J	28	33	Right-handed alpha
Helix 119	119	J	34	35	Right-handed 310
Helix 120	120	J	36	40	Right-handed 310
Helix 121	121	J	57	62	Right-handed alpha
Helix 122	122	J	62	68	Right-handed alpha
Helix 123	123	J	77	94	Right-handed alpha
Helix 124	124	J	116	124	Right-handed alpha
Helix 125	125	J	131	135	Right-handed 310
Helix 126	126	J	185	200	Right-handed alpha
Helix 127	127	J	201	208	Right-handed 310
Helix 128	128	J	216	225	Right-handed alpha
Helix 129	129	J	226	230	Right-handed 310
Helix 130	130	K	4	17	Right-handed alpha
Helix 131	131	K	28	33	Right-handed alpha
Helix 132	132	K	34	35	Right-handed 310
Helix 133	133	K	36	40	Right-handed 310
Helix 134	134	K	57	62	Right-handed alpha
Helix 135	135	K	62	70	Right-handed alpha
Helix 136	136	K	77	94	Right-handed alpha
Helix 137	137	K	116	124	Right-handed alpha
Helix 138	138	K	131	135	Right-handed 310
Helix 139	139	K	185	200	Right-handed alpha
Helix 140	140	K	201	208	Right-handed 310
Helix 141	141	K	216	225	Right-handed alpha
Helix 142	142	K	226	230	Right-handed 310
Helix 143	143	L	4	17	Right-handed alpha
Helix 144	144	L	28	33	Right-handed alpha
Helix 145	145	L	34	35	Right-handed 310
Helix 146	146	L	36	40	Right-handed 310
Helix 147	147	L	57	62	Right-handed alpha
Helix 148	148	L	62	70	Right-handed alpha
Helix 149	149	L	77	94	Right-handed alpha
Helix 150	150	L	116	124	Right-handed alpha
Helix 151	151	L	131	135	Right-handed 310
Helix 152	152	L	185	200	Right-handed alpha
Helix 153	153	L	201	208	Right-handed 310
Helix 154	154	L	216	225	Right-handed alpha
Helix 155	155	L	226	230	Right-handed 310
Helix 156	156	M	2	17	Right-handed alpha
Helix 157	157	M	28	33	Right-handed alpha
Helix 158	158	M	34	35	Right-handed 310
Helix 159	159	M	36	40	Right-handed 310
Helix 160	160	M	57	62	Right-handed alpha
Helix 161	161	M	62	68	Right-handed alpha
Helix 162	162	M	77	94	Right-handed alpha
Helix 163	163	M	116	124	Right-handed alpha
Helix 164	164	M	131	135	Right-handed 310
Helix 165	165	M	185	200	Right-handed alpha
Helix 166	166	M	201	208	Right-handed 310
Helix 167	167	M	216	225	Right-handed alpha
Helix 168	168	M	226	230	Right-handed 310
Helix 169	169	N	4	17	Right-handed alpha
Helix 170	170	N	28	33	Right-handed alpha
Helix 171	171	N	34	35	Right-handed 310
Helix 172	172	N	36	40	Right-handed 310
Helix 173	173	N	57	62	Right-handed alpha
Helix 174	174	N	62	70	Right-handed alpha
Helix 175	175	N	77	94	Right-handed alpha
Helix 176	176	N	116	124	Right-handed alpha
Helix 177	177	N	131	135	Right-handed 310
Helix 178	178	N	185	200	Right-handed alpha
Helix 179	179	N	201	208	Right-handed 310
Helix 180	180	N	216	225	Right-handed alpha
Helix 181	181	N	226	228	Right-handed 310
Helix 182	182	N	229	235	Right-handed alpha
Helix 183	183	O	4	17	Right-handed alpha
Helix 184	184	O	28	34	Right-handed alpha
Helix 185	185	O	35	40	Right-handed 310
Helix 186	186	O	57	62	Right-handed alpha
Helix 187	187	O	62	68	Right-handed alpha
Helix 188	188	O	77	94	Right-handed alpha
Helix 189	189	O	116	124	Right-handed alpha
Helix 190	190	O	131	135	Right-handed 310
Helix 191	191	O	185	200	Right-handed alpha
Helix 192	192	O	201	208	Right-handed 310
Helix 193	193	O	216	225	Right-handed alpha
Helix 194	194	O	226	231	Right-handed alpha
Helix 195	195	P	3	17	Right-handed alpha
Helix 196	196	P	28	33	Right-handed alpha
Helix 197	197	P	34	35	Right-handed 310
Helix 198	198	P	36	40	Right-handed 310
Helix 199	199	P	57	62	Right-handed alpha
Helix 200	200	P	62	67	Right-handed alpha
Helix 201	201	P	77	94	Right-handed alpha
Helix 202	202	P	116	124	Right-handed alpha
Helix 203	203	P	131	135	Right-handed 310
Helix 204	204	P	185	200	Right-handed alpha
Helix 205	205	P	201	208	Right-handed 310
Helix 206	206	P	216	225	Right-handed alpha
Helix 207	207	P	226	230	Right-handed 310

There are 32 sheets in PDB entry 3SOM. 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,

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	21	27	first strand
Strand 2	A	47	54	anti-parallel
Strand 3	A	159	170	anti-parallel
Strand 4	A	100	103	anti-parallel

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There are 2 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	128	130	first strand
Strand 2	A	148	150	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	B	21	27	first strand
Strand 2	B	47	54	anti-parallel
Strand 3	B	159	170	anti-parallel
Strand 4	B	100	103	anti-parallel

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There are 2 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	128	130	first strand
Strand 2	B	148	150	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	C	21	27	first strand
Strand 2	C	47	54	anti-parallel
Strand 3	C	159	170	anti-parallel
Strand 4	C	100	103	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	C	128	130	first strand
Strand 2	C	148	150	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	D	21	27	first strand
Strand 2	D	47	54	anti-parallel
Strand 3	D	159	170	anti-parallel
Strand 4	D	100	103	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	D	128	130	first strand
Strand 2	D	148	150	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	E	21	27	first strand
Strand 2	E	47	54	anti-parallel
Strand 3	E	159	170	anti-parallel
Strand 4	E	100	103	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	128	130	first strand
Strand 2	E	148	150	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	F	21	27	first strand
Strand 2	F	47	54	anti-parallel
Strand 3	F	159	170	anti-parallel
Strand 4	F	100	103	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	128	130	first strand
Strand 2	F	148	150	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	G	21	27	first strand
Strand 2	G	47	54	anti-parallel
Strand 3	G	159	170	anti-parallel
Strand 4	G	100	103	anti-parallel

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There are 2 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	128	130	first strand
Strand 2	G	148	150	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	H	21	27	first strand
Strand 2	H	47	54	anti-parallel
Strand 3	H	159	170	anti-parallel
Strand 4	H	100	103	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	H	128	130	first strand
Strand 2	H	148	150	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	I	21	27	first strand
Strand 2	I	47	54	anti-parallel
Strand 3	I	159	170	anti-parallel
Strand 4	I	100	103	anti-parallel

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There are 2 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	128	130	first strand
Strand 2	I	148	150	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	J	21	27	first strand
Strand 2	J	47	54	anti-parallel
Strand 3	J	159	170	anti-parallel
Strand 4	J	100	103	anti-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	J	128	130	first strand
Strand 2	J	148	150	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	21	27	first strand
Strand 2	K	47	54	anti-parallel
Strand 3	K	159	170	anti-parallel
Strand 4	K	100	103	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	K	128	130	first strand
Strand 2	K	148	150	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	L	21	27	first strand
Strand 2	L	47	54	anti-parallel
Strand 3	L	159	170	anti-parallel
Strand 4	L	100	103	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	128	130	first strand
Strand 2	L	148	150	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	M	21	27	first strand
Strand 2	M	47	54	anti-parallel
Strand 3	M	159	170	anti-parallel
Strand 4	M	100	103	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	M	128	130	first strand
Strand 2	M	148	150	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	N	21	27	first strand
Strand 2	N	47	54	anti-parallel
Strand 3	N	159	170	anti-parallel
Strand 4	N	100	103	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	N	128	130	first strand
Strand 2	N	148	150	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	O	21	27	first strand
Strand 2	O	47	54	anti-parallel
Strand 3	O	159	170	anti-parallel
Strand 4	O	100	103	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	O	128	130	first strand
Strand 2	O	148	150	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	P	21	27	first strand
Strand 2	P	47	54	anti-parallel
Strand 3	P	159	170	anti-parallel
Strand 4	P	100	103	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	P	128	130	first strand
Strand 2	P	148	150	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: 3SOM

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