Analysis of interatomic Contacts of Structural Units in PDB entry:
4I18

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 4I18 entry

There are 6 chains in PDB entry 4I18 (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
L	SER 1	GLU 216
H	GLU 4	SER 230
B	SER 1	GLY 215
A	GLU 4	PRO 228
R	PRO 3	THR 211
C	PRO 3	GLN 201

There are 19 helices in PDB entry 4I18. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	6	L	80	84	Right-handed 310
Helix 2	7	L	124	131	Right-handed alpha
Helix 3	8	L	186	191	Right-handed alpha
Helix 4	12	H	31	33	Right-handed 310
Helix 5	13	H	65	68	Right-handed 310
Helix 6	14	H	202	204	Right-handed 310
Helix 7	15	H	216	219	Right-handed 310
Helix 8	9	B	80	84	Right-handed 310
Helix 9	10	B	124	130	Right-handed alpha
Helix 10	11	B	186	191	Right-handed alpha
Helix 11	16	A	31	33	Right-handed 310
Helix 12	17	A	90	94	Right-handed 310
Helix 13	18	A	202	204	Right-handed 310
Helix 14	19	A	216	219	Right-handed 310
Helix 15	1	R	65	69	Right-handed 310
Helix 16	2	R	97	101	Right-handed 310
Helix 17	3	R	205	209	Right-handed 310
Helix 18	4	C	65	70	Right-handed alpha
Helix 19	5	C	98	101	Right-handed 310

There are 31 sheets in PDB entry 4I18. 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,

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	R	8	13	first strand
Strand 2	R	20	25	anti-parallel
Strand 3	R	61	64	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	R	49	50	first strand
Strand 2	R	35	42	anti-parallel
Strand 3	R	75	82	anti-parallel
Strand 4	R	87	88	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	R	49	50	first strand
Strand 2	R	35	42	anti-parallel
Strand 3	R	75	82	anti-parallel
Strand 4	R	92	95	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	R	107	114	first strand
Strand 2	R	122	128	anti-parallel
Strand 3	R	166	169	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	R	157	160	first strand
Strand 2	R	142	150	anti-parallel
Strand 3	R	177	186	anti-parallel
Strand 4	R	198	201	anti-parallel

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There are 3 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	8	13	first strand
Strand 2	C	20	25	anti-parallel
Strand 3	C	61	64	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	49	50	first strand
Strand 2	C	38	41	anti-parallel
Strand 3	C	74	82	anti-parallel
Strand 4	C	87	89	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	49	50	first strand
Strand 2	C	38	41	anti-parallel
Strand 3	C	74	82	anti-parallel
Strand 4	C	93	96	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	107	113	first strand
Strand 2	C	123	128	anti-parallel
Strand 3	C	166	169	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	157	160	first strand
Strand 2	C	143	148	anti-parallel
Strand 3	C	178	185	anti-parallel
Strand 4	C	198	200	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	L	5	8	first strand
Strand 2	L	20	26	anti-parallel
Strand 3	L	71	76	anti-parallel
Strand 4	L	63	68	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	11	15	first strand
Strand 2	L	105	110	parallel
Strand 3	L	85	91	anti-parallel
Strand 4	L	34	39	anti-parallel
Strand 5	L	46	50	anti-parallel
Strand 6	L	54	55	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	L	11	15	first strand
Strand 2	L	105	110	parallel
Strand 3	L	85	91	anti-parallel
Strand 4	L	100	101	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	L	117	121	first strand
Strand 2	L	132	142	anti-parallel
Strand 3	L	176	185	anti-parallel
Strand 4	L	162	166	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	L	156	157	first strand
Strand 2	L	148	153	anti-parallel
Strand 3	L	194	200	anti-parallel
Strand 4	L	208	213	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	B	5	8	first strand
Strand 2	B	20	26	anti-parallel
Strand 3	B	71	76	anti-parallel
Strand 4	B	63	68	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	11	15	first strand
Strand 2	B	105	110	parallel
Strand 3	B	85	91	anti-parallel
Strand 4	B	34	39	anti-parallel
Strand 5	B	46	50	anti-parallel
Strand 6	B	54	55	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	B	117	121	first strand
Strand 2	B	132	142	anti-parallel
Strand 3	B	176	185	anti-parallel
Strand 4	B	162	166	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	B	156	157	first strand
Strand 2	B	148	153	anti-parallel
Strand 3	B	194	200	anti-parallel
Strand 4	B	208	213	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	H	6	10	first strand
Strand 2	H	21	28	anti-parallel
Strand 3	H	81	86	anti-parallel
Strand 4	H	71	76	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	13	15	first strand
Strand 2	H	122	126	parallel
Strand 3	H	95	103	anti-parallel
Strand 4	H	35	42	anti-parallel
Strand 5	H	48	54	anti-parallel
Strand 6	H	61	63	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	H	13	15	first strand
Strand 2	H	122	126	parallel
Strand 3	H	95	103	anti-parallel
Strand 4	H	117	118	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	H	135	139	first strand
Strand 2	H	150	160	anti-parallel
Strand 3	H	191	200	anti-parallel
Strand 4	H	178	180	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	H	135	139	first strand
Strand 2	H	150	160	anti-parallel
Strand 3	H	191	200	anti-parallel
Strand 4	H	184	185	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	166	169	first strand
Strand 2	H	210	215	anti-parallel
Strand 3	H	220	225	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	A	6	10	first strand
Strand 2	A	21	28	anti-parallel
Strand 3	A	81	86	anti-parallel
Strand 4	A	71	76	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	13	15	first strand
Strand 2	A	122	126	parallel
Strand 3	A	95	103	anti-parallel
Strand 4	A	35	42	anti-parallel
Strand 5	A	48	54	anti-parallel
Strand 6	A	61	63	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	13	15	first strand
Strand 2	A	122	126	parallel
Strand 3	A	95	103	anti-parallel
Strand 4	A	117	118	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	A	135	139	first strand
Strand 2	A	150	160	anti-parallel
Strand 3	A	191	200	anti-parallel
Strand 4	A	178	180	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	135	139	first strand
Strand 2	A	150	160	anti-parallel
Strand 3	A	191	200	anti-parallel
Strand 4	A	184	185	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	166	169	first strand
Strand 2	A	210	215	anti-parallel
Strand 3	A	220	225	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: 4I18

Analysis of interatomic Contacts of Structural Units in PDB entry:
4I18