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


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).
For CSU analysis of other PDB entry

This page provides analyses of contacts formed by:
For analysis of ligand-protein contacts, use: 3D structure can be seen in additional window with STING software for 3IRN entry

There are 4 chains in PDB entry 3IRN (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
 MET 1SER 516
B
 LEU 3LYS 518
C
 SER 2MET 517
D
 LEU 3ILE 515
Residue contacts

1. List of contacts for up to 10 consecutive residues:
Chain ID from residue number to residue number


2. Detailed analyses of contacts for any single residue:
Residue number chain ID
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There are 85 helices in PDB entry 3IRN. 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 14Right-handed 310
Helix 2
2
A
45 58Right-handed alpha
Helix 3
3
A
78 83Right-handed alpha
Helix 4
4
A
104 112Right-handed alpha
Helix 5
5
A
114 121Right-handed alpha
Helix 6
6
A
131 140Right-handed alpha
Helix 7
7
A
156 164Right-handed alpha
Helix 8
8
A
167 170Right-handed 310
Helix 9
9
A
234 251Right-handed alpha
Helix 10
10
A
275 278Right-handed 310
Helix 11
11
A
288 301Right-handed alpha
Helix 12
12
A
306 312Right-handed alpha
Helix 13
13
A
322 328Right-handed alpha
Helix 14
14
A
342 349Right-handed alpha
Helix 15
15
A
367 377Right-handed alpha
Helix 16
16
A
394 398Right-handed 310
Helix 17
17
A
429 449Right-handed alpha
Helix 18
18
A
468 470Right-handed 310
Helix 19
19
A
471 479Right-handed alpha
Helix 20
20
A
495 499Right-handed 310
Helix 21
21
A
500 502Right-handed 310
Helix 22
22
B
13 17Right-handed 310
Helix 23
23
B
45 58Right-handed alpha
Helix 24
24
B
78 84Right-handed alpha
Helix 25
25
B
85 89Right-handed 310
Helix 26
26
B
104 111Right-handed alpha
Helix 27
27
B
114 121Right-handed alpha
Helix 28
28
B
131 139Right-handed alpha
Helix 29
29
B
156 164Right-handed alpha
Helix 30
30
B
168 170Right-handed 310
Helix 31
31
B
198 202Right-handed 310
Helix 32
32
B
234 251Right-handed alpha
Helix 33
33
B
275 278Right-handed 310
Helix 34
34
B
288 301Right-handed alpha
Helix 35
35
B
306 311Right-handed alpha
Helix 36
36
B
322 329Right-handed alpha
Helix 37
37
B
343 350Right-handed alpha
Helix 38
38
B
367 379Right-handed alpha
Helix 39
39
B
394 398Right-handed 310
Helix 40
40
B
429 449Right-handed alpha
Helix 41
41
B
469 477Right-handed alpha
Helix 42
42
B
500 502Right-handed 310
Helix 43
43
C
13 17Right-handed 310
Helix 44
44
C
45 58Right-handed alpha
Helix 45
45
C
78 84Right-handed alpha
Helix 46
46
C
85 89Right-handed 310
Helix 47
47
C
104 111Right-handed alpha
Helix 48
48
C
115 121Right-handed alpha
Helix 49
49
C
131 140Right-handed alpha
Helix 50
50
C
156 164Right-handed alpha
Helix 51
51
C
167 170Right-handed 310
Helix 52
52
C
198 202Right-handed 310
Helix 53
53
C
234 250Right-handed alpha
Helix 54
54
C
275 278Right-handed 310
Helix 55
55
C
288 301Right-handed alpha
Helix 56
56
C
306 311Right-handed alpha
Helix 57
57
C
317 322Right-handed alpha
Helix 58
58
C
322 329Right-handed alpha
Helix 59
59
C
342 350Right-handed alpha
Helix 60
60
C
367 379Right-handed alpha
Helix 61
61
C
394 398Right-handed 310
Helix 62
62
C
429 449Right-handed alpha
Helix 63
63
C
469 477Right-handed alpha
Helix 64
64
C
495 499Right-handed 310
Helix 65
65
C
500 502Right-handed 310
Helix 66
66
D
13 17Right-handed 310
Helix 67
67
D
45 58Right-handed alpha
Helix 68
68
D
78 83Right-handed alpha
Helix 69
69
D
104 111Right-handed alpha
Helix 70
70
D
116 121Right-handed alpha
Helix 71
71
D
131 139Right-handed alpha
Helix 72
72
D
156 164Right-handed alpha
Helix 73
73
D
167 170Right-handed 310
Helix 74
74
D
236 251Right-handed alpha
Helix 75
75
D
275 278Right-handed 310
Helix 76
76
D
288 301Right-handed alpha
Helix 77
77
D
306 311Right-handed alpha
Helix 78
78
D
317 322Right-handed alpha
Helix 79
79
D
322 329Right-handed alpha
Helix 80
80
D
342 350Right-handed alpha
Helix 81
81
D
367 379Right-handed alpha
Helix 82
82
D
394 398Right-handed 310
Helix 83
83
D
429 449Right-handed alpha
Helix 84
84
D
469 477Right-handed alpha
Helix 85
85
D
495 499Right-handed 310
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There are 17 sheets in PDB entry 3IRN. 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 128first strand
Strand 2
A
94 99parallel
Strand 3
A
71 77parallel
Strand 4
A
148 155parallel
Strand 5
A
23 30parallel
Strand 6
A
172 180parallel
Strand 7
A
228 232anti-parallel
Strand 8
A
206 211anti-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 128first strand
Strand 2
A
94 99parallel
Strand 3
A
71 77parallel
Strand 4
A
148 155parallel
Strand 5
A
23 30parallel
Strand 6
A
172 180parallel
Strand 7
A
224 226anti-parallel
Strand 8
A
215 216anti-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
252 255first strand
Strand 2
A
261 273anti-parallel
Strand 3
A
452 466anti-parallel
Strand 4
A
415 426parallel
Strand 5
A
406 412anti-parallel
Strand 6
A
386 388anti-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
A
486 489first strand
Strand 2
A
504 507anti-parallel
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There are 8 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
125 128first strand
Strand 2
B
94 99parallel
Strand 3
B
71 77parallel
Strand 4
B
148 153parallel
Strand 5
B
23 30parallel
Strand 6
B
172 180parallel
Strand 7
B
228 232anti-parallel
Strand 8
B
206 211anti-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 128first strand
Strand 2
B
94 99parallel
Strand 3
B
71 77parallel
Strand 4
B
148 153parallel
Strand 5
B
23 30parallel
Strand 6
B
172 180parallel
Strand 7
B
224 226anti-parallel
Strand 8
B
215 216anti-parallel
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There are 6 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
252 255first strand
Strand 2
B
261 273anti-parallel
Strand 3
B
452 466anti-parallel
Strand 4
B
415 426parallel
Strand 5
B
404 412anti-parallel
Strand 6
B
386 388anti-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
B
486 489first strand
Strand 2
B
504 507anti-parallel
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There are 8 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
125 128first strand
Strand 2
C
94 99parallel
Strand 3
C
71 77parallel
Strand 4
C
148 153parallel
Strand 5
C
23 29parallel
Strand 6
C
172 181parallel
Strand 7
C
224 232anti-parallel
Strand 8
C
206 211anti-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 128first strand
Strand 2
C
94 99parallel
Strand 3
C
71 77parallel
Strand 4
C
148 153parallel
Strand 5
C
23 29parallel
Strand 6
C
172 181parallel
Strand 7
C
224 232anti-parallel
Strand 8
C
215 216anti-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
C
34 36first strand
Strand 2
C
189 190anti-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
252 255first strand
Strand 2
C
261 273anti-parallel
Strand 3
C
452 466anti-parallel
Strand 4
C
415 426parallel
Strand 5
C
404 412anti-parallel
Strand 6
C
386 388anti-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 489first strand
Strand 2
C
504 507anti-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 128first strand
Strand 2
D
94 99parallel
Strand 3
D
71 77parallel
Strand 4
D
148 153parallel
Strand 5
D
23 30parallel
Strand 6
D
172 180parallel
Strand 7
D
224 232anti-parallel
Strand 8
D
206 211anti-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 128first strand
Strand 2
D
94 99parallel
Strand 3
D
71 77parallel
Strand 4
D
148 153parallel
Strand 5
D
23 30parallel
Strand 6
D
172 180parallel
Strand 7
D
224 232anti-parallel
Strand 8
D
215 216anti-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 255first strand
Strand 2
D
261 273anti-parallel
Strand 3
D
452 466anti-parallel
Strand 4
D
415 426parallel
Strand 5
D
404 412anti-parallel
Strand 6
D
386 388anti-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 489first strand
Strand 2
D
504 507anti-parallel
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Please mail questions/suggestions concerning this page to Vladimir.Sobolev@weizmann. ac.il