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

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 3IRO entry

There are 4 chains in PDB entry 3IRO (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	MET 1	LYS 518
B	LEU 3	MET 517
C	SER 2	MET 517
D	LEU 3	ILE 515

There are 83 helices in PDB entry 3IRO. 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	14	Right-handed 310
Helix 2	2	A	45	58	Right-handed alpha
Helix 3	3	A	78	83	Right-handed alpha
Helix 4	4	A	104	111	Right-handed alpha
Helix 5	5	A	114	121	Right-handed alpha
Helix 6	6	A	131	140	Right-handed alpha
Helix 7	7	A	156	164	Right-handed alpha
Helix 8	8	A	167	170	Right-handed 310
Helix 9	9	A	198	202	Right-handed 310
Helix 10	10	A	234	251	Right-handed alpha
Helix 11	11	A	288	302	Right-handed alpha
Helix 12	12	A	306	311	Right-handed alpha
Helix 13	13	A	317	322	Right-handed alpha
Helix 14	14	A	322	328	Right-handed alpha
Helix 15	15	A	343	350	Right-handed alpha
Helix 16	16	A	367	377	Right-handed alpha
Helix 17	17	A	394	398	Right-handed 310
Helix 18	18	A	429	448	Right-handed alpha
Helix 19	19	A	471	479	Right-handed alpha
Helix 20	20	A	495	499	Right-handed 310
Helix 21	21	A	500	502	Right-handed 310
Helix 22	22	B	45	58	Right-handed alpha
Helix 23	23	B	78	83	Right-handed alpha
Helix 24	24	B	104	111	Right-handed alpha
Helix 25	25	B	116	121	Right-handed alpha
Helix 26	26	B	131	139	Right-handed alpha
Helix 27	27	B	156	164	Right-handed alpha
Helix 28	28	B	167	170	Right-handed 310
Helix 29	29	B	198	202	Right-handed 310
Helix 30	30	B	234	251	Right-handed alpha
Helix 31	31	B	288	301	Right-handed alpha
Helix 32	32	B	306	311	Right-handed alpha
Helix 33	33	B	318	321	Right-handed 310
Helix 34	34	B	322	329	Right-handed alpha
Helix 35	35	B	343	350	Right-handed alpha
Helix 36	36	B	367	377	Right-handed alpha
Helix 37	37	B	394	398	Right-handed 310
Helix 38	38	B	429	448	Right-handed alpha
Helix 39	39	B	469	479	Right-handed alpha
Helix 40	40	B	495	499	Right-handed 310
Helix 41	41	B	500	502	Right-handed 310
Helix 42	42	C	9	17	Right-handed 310
Helix 43	43	C	45	58	Right-handed alpha
Helix 44	44	C	77	83	Right-handed alpha
Helix 45	45	C	85	89	Right-handed 310
Helix 46	46	C	104	111	Right-handed alpha
Helix 47	47	C	114	121	Right-handed alpha
Helix 48	48	C	131	139	Right-handed alpha
Helix 49	49	C	156	164	Right-handed alpha
Helix 50	50	C	167	170	Right-handed 310
Helix 51	51	C	236	251	Right-handed alpha
Helix 52	52	C	288	302	Right-handed alpha
Helix 53	53	C	306	311	Right-handed alpha
Helix 54	54	C	322	328	Right-handed alpha
Helix 55	55	C	342	350	Right-handed alpha
Helix 56	56	C	367	379	Right-handed alpha
Helix 57	57	C	391	395	Right-handed 310
Helix 58	58	C	429	448	Right-handed alpha
Helix 59	59	C	469	479	Right-handed alpha
Helix 60	60	C	495	499	Right-handed 310
Helix 61	61	C	500	502	Right-handed 310
Helix 62	62	D	9	17	Right-handed 310
Helix 63	63	D	45	58	Right-handed alpha
Helix 64	64	D	78	83	Right-handed alpha
Helix 65	65	D	104	112	Right-handed alpha
Helix 66	66	D	116	121	Right-handed alpha
Helix 67	67	D	131	141	Right-handed alpha
Helix 68	68	D	156	164	Right-handed alpha
Helix 69	69	D	167	170	Right-handed 310
Helix 70	70	D	198	202	Right-handed 310
Helix 71	71	D	234	251	Right-handed alpha
Helix 72	72	D	275	278	Right-handed 310
Helix 73	73	D	288	301	Right-handed alpha
Helix 74	74	D	306	311	Right-handed alpha
Helix 75	75	D	317	322	Right-handed alpha
Helix 76	76	D	322	329	Right-handed alpha
Helix 77	77	D	342	349	Right-handed alpha
Helix 78	78	D	367	379	Right-handed alpha
Helix 79	79	D	394	398	Right-handed 310
Helix 80	80	D	429	449	Right-handed alpha
Helix 81	81	D	469	477	Right-handed alpha
Helix 82	82	D	495	499	Right-handed 310
Helix 83	83	D	500	502	Right-handed 310

There are 17 sheets in PDB entry 3IRO. 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,

There are 8 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	125	128	first strand
Strand 2	A	94	99	parallel
Strand 3	A	71	77	parallel
Strand 4	A	148	155	parallel
Strand 5	A	23	30	parallel
Strand 6	A	172	180	parallel
Strand 7	A	224	232	anti-parallel
Strand 8	A	206	211	anti-parallel

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There are 8 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	125	128	first strand
Strand 2	A	94	99	parallel
Strand 3	A	71	77	parallel
Strand 4	A	148	155	parallel
Strand 5	A	23	30	parallel
Strand 6	A	172	180	parallel
Strand 7	A	224	232	anti-parallel
Strand 8	A	215	216	anti-parallel

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There are 2 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	34	36	first strand
Strand 2	A	189	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	252	255	first strand
Strand 2	A	261	273	anti-parallel
Strand 3	A	452	466	anti-parallel
Strand 4	A	415	426	parallel
Strand 5	A	404	412	anti-parallel
Strand 6	A	386	388	anti-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	486	489	first strand
Strand 2	A	504	507	anti-parallel

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There are 8 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	125	128	first strand
Strand 2	B	94	99	parallel
Strand 3	B	71	77	parallel
Strand 4	B	148	155	parallel
Strand 5	B	23	30	parallel
Strand 6	B	172	181	parallel
Strand 7	B	228	232	anti-parallel
Strand 8	B	206	211	anti-parallel

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There are 8 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	125	128	first strand
Strand 2	B	94	99	parallel
Strand 3	B	71	77	parallel
Strand 4	B	148	155	parallel
Strand 5	B	23	30	parallel
Strand 6	B	172	181	parallel
Strand 7	B	224	226	anti-parallel
Strand 8	B	215	216	anti-parallel

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There are 6 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	252	255	first strand
Strand 2	B	261	273	anti-parallel
Strand 3	B	452	466	anti-parallel
Strand 4	B	415	426	parallel
Strand 5	B	404	412	anti-parallel
Strand 6	B	386	388	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	B	486	489	first strand
Strand 2	B	504	507	anti-parallel

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There are 8 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	125	128	first strand
Strand 2	C	94	99	parallel
Strand 3	C	71	76	parallel
Strand 4	C	148	155	parallel
Strand 5	C	23	30	parallel
Strand 6	C	172	180	parallel
Strand 7	C	224	232	anti-parallel
Strand 8	C	206	211	anti-parallel

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There are 8 strands in K sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	125	128	first strand
Strand 2	C	94	99	parallel
Strand 3	C	71	76	parallel
Strand 4	C	148	155	parallel
Strand 5	C	23	30	parallel
Strand 6	C	172	180	parallel
Strand 7	C	224	232	anti-parallel
Strand 8	C	215	216	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	C	254	255	first strand
Strand 2	C	261	273	anti-parallel
Strand 3	C	452	466	anti-parallel
Strand 4	C	415	426	parallel
Strand 5	C	404	412	anti-parallel
Strand 6	C	386	388	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	C	486	489	first strand
Strand 2	C	504	507	anti-parallel

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There are 8 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	125	128	first strand
Strand 2	D	94	99	parallel
Strand 3	D	71	77	parallel
Strand 4	D	148	155	parallel
Strand 5	D	23	30	parallel
Strand 6	D	172	180	parallel
Strand 7	D	224	232	anti-parallel
Strand 8	D	206	211	anti-parallel

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There are 8 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	125	128	first strand
Strand 2	D	94	99	parallel
Strand 3	D	71	77	parallel
Strand 4	D	148	155	parallel
Strand 5	D	23	30	parallel
Strand 6	D	172	180	parallel
Strand 7	D	224	232	anti-parallel
Strand 8	D	215	216	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	D	252	255	first strand
Strand 2	D	261	273	anti-parallel
Strand 3	D	452	466	anti-parallel
Strand 4	D	415	426	parallel
Strand 5	D	404	412	anti-parallel
Strand 6	D	386	388	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	486	489	first strand
Strand 2	D	504	507	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: 3IRO

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