Analysis of interatomic Contacts of Structural Units in PDB entry:
1A4S


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 1A4S entry

There are 4 chains in PDB entry 1A4S (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
 ALA 1PHE 503
B
 ALA 1PHE 503
C
 ALA 1PHE 503
D
 ALA 1PHE 503
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 81 helices in PDB entry 1A4S. Click on helix of interest for CSU analysis.
Helix
number 		Helix
ID		Chain
ID		 Initial
residue		Terminal
residue		 Helix class
Helix 1
1
A
2 9Right-handed alpha
Helix 2
2
A
57 76Right-handed alpha
Helix 3
3
A
79 95Right-handed alpha
Helix 4
4
A
97 108Right-handed alpha
Helix 5
5
A
112 135Right-handed alpha
Helix 6
6
A
144 146Right-handed 310
Helix 7
7
A
168 181Right-handed alpha
Helix 8
8
A
197 208Right-handed alpha
Helix 9
9
A
222 230Right-handed alpha
Helix 10
10
A
243 256Right-handed alpha
Helix 11
11
A
278 287Right-handed alpha
Helix 12
12
A
291 294Right-handed 310
Helix 13
13
A
307 323Right-handed 310
Helix 14
14
A
342 358Right-handed alpha
Helix 15
15
A
374 376Right-handed 310
Helix 16
16
A
395 398Right-handed alpha
Helix 17
17
A
414 422Right-handed alpha
Helix 18
18
A
437 446Right-handed alpha
Helix 19
19
A
470 472Right-handed 310
Helix 20
20
A
481 485Right-handed 310
Helix 21
21
B
2 9Right-handed alpha
Helix 22
22
B
57 76Right-handed alpha
Helix 23
23
B
79 95Right-handed alpha
Helix 24
24
B
97 108Right-handed alpha
Helix 25
25
B
112 135Right-handed alpha
Helix 26
26
B
144 146Right-handed 310
Helix 27
27
B
168 181Right-handed alpha
Helix 28
28
B
196 208Right-handed alpha
Helix 29
29
B
222 230Right-handed alpha
Helix 30
30
B
243 256Right-handed alpha
Helix 31
31
B
278 287Right-handed alpha
Helix 32
32
B
291 294Right-handed 310
Helix 33
33
B
307 322Right-handed 310
Helix 34
34
B
342 358Right-handed alpha
Helix 35
35
B
374 376Right-handed 310
Helix 36
36
B
395 398Right-handed alpha
Helix 37
37
B
414 422Right-handed alpha
Helix 38
38
B
437 446Right-handed alpha
Helix 39
39
B
470 472Right-handed 310
Helix 40
40
B
481 485Right-handed 310
Helix 41
41
C
2 5Right-handed alpha
Helix 42
42
C
7 9Right-handed 310
Helix 43
43
C
57 76Right-handed alpha
Helix 44
44
C
79 95Right-handed alpha
Helix 45
45
C
97 108Right-handed alpha
Helix 46
46
C
112 135Right-handed alpha
Helix 47
47
C
144 146Right-handed 310
Helix 48
48
C
168 181Right-handed alpha
Helix 49
49
C
196 208Right-handed alpha
Helix 50
50
C
222 230Right-handed alpha
Helix 51
51
C
243 256Right-handed alpha
Helix 52
52
C
278 287Right-handed alpha
Helix 53
53
C
291 294Right-handed 310
Helix 54
54
C
307 322Right-handed 310
Helix 55
55
C
342 358Right-handed alpha
Helix 56
56
C
374 376Right-handed 310
Helix 57
57
C
395 398Right-handed alpha
Helix 58
58
C
414 422Right-handed alpha
Helix 59
59
C
437 446Right-handed alpha
Helix 60
60
C
470 472Right-handed 310
Helix 61
61
C
481 485Right-handed 310
Helix 62
62
D
2 9Right-handed alpha
Helix 63
63
D
57 76Right-handed alpha
Helix 64
64
D
79 95Right-handed alpha
Helix 65
65
D
97 108Right-handed alpha
Helix 66
66
D
112 135Right-handed alpha
Helix 67
67
D
144 146Right-handed 310
Helix 68
68
D
168 181Right-handed alpha
Helix 69
69
D
196 208Right-handed alpha
Helix 70
70
D
222 230Right-handed alpha
Helix 71
71
D
243 256Right-handed alpha
Helix 72
72
D
278 289Right-handed alpha
Helix 73
73
D
291 294Right-handed 310
Helix 74
74
D
307 323Right-handed 310
Helix 75
75
D
342 358Right-handed alpha
Helix 76
76
D
374 376Right-handed 310
Helix 77
77
D
395 398Right-handed alpha
Helix 78
78
D
414 422Right-handed alpha
Helix 79
79
D
437 446Right-handed alpha
Helix 80
80
D
470 472Right-handed 310
Helix 81
81
D
481 485Right-handed 310
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There are 20 sheets in PDB entry 1A4S. 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,

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
22 24first strand
Strand 2
A
27 29anti-parallel
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There are 3 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
140 142first strand
Strand 2
A
148 155anti-parallel
Strand 3
A
487 494anti-parallel
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There are 5 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
259 263first strand
Strand 2
A
236 240parallel
Strand 3
A
158 162parallel
Strand 4
A
185 189parallel
Strand 5
A
215 217parallel
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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
A
451 454first strand
Strand 2
A
429 433parallel
Strand 3
A
268 272parallel
Strand 4
A
300 306parallel
Strand 5
A
405 411parallel
Strand 6
A
385 388parallel
Strand 7
A
361 364anti-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
38 41first strand
Strand 2
A
48 52anti-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
22 24first strand
Strand 2
B
27 29anti-parallel
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There are 3 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
140 142first strand
Strand 2
B
148 155anti-parallel
Strand 3
B
487 494anti-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
B
259 263first strand
Strand 2
B
236 240parallel
Strand 3
B
158 162parallel
Strand 4
B
185 189parallel
Strand 5
B
215 217parallel
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There are 6 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
430 433first strand
Strand 2
B
268 272parallel
Strand 3
B
300 306parallel
Strand 4
B
405 411parallel
Strand 5
B
385 388parallel
Strand 6
B
361 364anti-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
B
38 41first strand
Strand 2
B
48 52anti-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
22 24first strand
Strand 2
C
27 29anti-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
C
140 142first strand
Strand 2
C
148 155anti-parallel
Strand 3
C
487 494anti-parallel
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There are 5 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
259 263first strand
Strand 2
C
236 240parallel
Strand 3
C
158 162parallel
Strand 4
C
185 189parallel
Strand 5
C
215 217parallel
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There are 6 strands in N sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
C
430 433first strand
Strand 2
C
268 272parallel
Strand 3
C
300 306parallel
Strand 4
C
405 411parallel
Strand 5
C
385 388parallel
Strand 6
C
361 364anti-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
C
38 41first strand
Strand 2
C
48 52anti-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
D
22 24first strand
Strand 2
D
27 29anti-parallel
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There are 3 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
140 142first strand
Strand 2
D
148 155anti-parallel
Strand 3
D
487 494anti-parallel
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There are 5 strands in R sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
259 263first strand
Strand 2
D
236 240parallel
Strand 3
D
158 162parallel
Strand 4
D
185 189parallel
Strand 5
D
215 217parallel
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There are 6 strands in S sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
430 433first strand
Strand 2
D
269 272parallel
Strand 3
D
302 306parallel
Strand 4
D
405 411parallel
Strand 5
D
385 388parallel
Strand 6
D
361 364anti-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
D
38 41first strand
Strand 2
D
48 52anti-parallel
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