Analysis of interatomic Contacts of Structural Units in PDB entry:
2A1S


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 2A1S entry

There are 4 chains in PDB entry 2A1S (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
 MET 1ILE 430
B
 MET 1VAL 427
C
 MET 1ILE 430
D
 MET 1ILE 430
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 65 helices in PDB entry 2A1S. 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 6Right-handed 310
Helix 2
2
A
7 22Right-handed alpha
Helix 3
3
A
49 61Right-handed alpha
Helix 4
4
A
110 118Right-handed alpha
Helix 5
5
A
122 128Right-handed alpha
Helix 6
6
A
135 143Right-handed alpha
Helix 7
7
A
174 176Right-handed 310
Helix 8
8
A
177 193Right-handed alpha
Helix 9
9
A
206 218Right-handed alpha
Helix 10
10
A
252 268Right-handed alpha
Helix 11
11
A
270 279Right-handed alpha
Helix 12
12
A
289 301Right-handed alpha
Helix 13
13
A
307 319Right-handed alpha
Helix 14
14
A
325 330Right-handed alpha
Helix 15
15
A
342 350Right-handed alpha
Helix 16
16
A
378 399Right-handed alpha
Helix 17
17
A
415 419Right-handed 310
Helix 18
18
B
4 10Right-handed 310
Helix 19
19
B
11 21Right-handed alpha
Helix 20
20
B
49 61Right-handed alpha
Helix 21
21
B
110 119Right-handed alpha
Helix 22
22
B
122 128Right-handed alpha
Helix 23
23
B
135 146Right-handed alpha
Helix 24
24
B
174 192Right-handed alpha
Helix 25
25
B
207 220Right-handed alpha
Helix 26
26
B
245 269Right-handed alpha
Helix 27
27
B
270 279Right-handed alpha
Helix 28
28
B
289 301Right-handed alpha
Helix 29
29
B
307 319Right-handed alpha
Helix 30
30
B
325 331Right-handed alpha
Helix 31
31
B
342 350Right-handed alpha
Helix 32
32
B
378 399Right-handed alpha
Helix 33
33
B
415 419Right-handed 310
Helix 34
34
C
4 6Right-handed 310
Helix 35
35
C
7 21Right-handed alpha
Helix 36
36
C
49 61Right-handed alpha
Helix 37
37
C
110 118Right-handed alpha
Helix 38
38
C
122 128Right-handed alpha
Helix 39
39
C
135 144Right-handed alpha
Helix 40
40
C
177 193Right-handed alpha
Helix 41
41
C
207 221Right-handed alpha
Helix 42
42
C
245 269Right-handed alpha
Helix 43
43
C
270 281Right-handed alpha
Helix 44
44
C
289 301Right-handed alpha
Helix 45
45
C
307 316Right-handed alpha
Helix 46
46
C
325 331Right-handed alpha
Helix 47
47
C
342 350Right-handed alpha
Helix 48
48
C
378 398Right-handed alpha
Helix 49
49
C
399 401Right-handed 310
Helix 50
50
C
415 419Right-handed 310
Helix 51
51
D
11 22Right-handed alpha
Helix 52
52
D
49 61Right-handed alpha
Helix 53
53
D
110 119Right-handed alpha
Helix 54
54
D
123 128Right-handed alpha
Helix 55
55
D
135 142Right-handed alpha
Helix 56
56
D
177 193Right-handed alpha
Helix 57
57
D
206 219Right-handed alpha
Helix 58
58
D
245 268Right-handed alpha
Helix 59
59
D
270 281Right-handed alpha
Helix 60
60
D
289 301Right-handed alpha
Helix 61
61
D
307 319Right-handed alpha
Helix 62
62
D
325 329Right-handed alpha
Helix 63
63
D
342 350Right-handed alpha
Helix 64
64
D
378 400Right-handed alpha
Helix 65
65
D
415 419Right-handed 310
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There are 17 sheets in PDB entry 2A1S. 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 6 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
2 3first strand
Strand 2
A
82 91parallel
Strand 3
A
66 77anti-parallel
Strand 4
A
24 31anti-parallel
Strand 5
A
283 286parallel
Strand 6
A
322 324parallel
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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
2 3first strand
Strand 2
A
82 91parallel
Strand 3
A
360 362parallel
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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
105 109first strand
Strand 2
D
105 109anti-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
A
201 202first strand
Strand 2
A
237 240anti-parallel
Strand 3
A
228 231anti-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
421 423first strand
Strand 2
A
427 429anti-parallel
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There are 6 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
2 3first strand
Strand 2
B
82 91parallel
Strand 3
B
66 77anti-parallel
Strand 4
B
24 31anti-parallel
Strand 5
B
284 286parallel
Strand 6
B
322 324parallel
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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
2 3first strand
Strand 2
B
82 91parallel
Strand 3
B
360 362parallel
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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
105 109first strand
Strand 2
C
105 109anti-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
B
200 202first strand
Strand 2
B
238 241anti-parallel
Strand 3
B
227 230anti-parallel
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There are 6 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
2 3first strand
Strand 2
C
82 91parallel
Strand 3
C
66 77anti-parallel
Strand 4
C
24 31anti-parallel
Strand 5
C
283 286parallel
Strand 6
C
322 324parallel
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There are 3 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
2 3first strand
Strand 2
C
82 91parallel
Strand 3
C
360 362parallel
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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
199 201first strand
Strand 2
C
237 243anti-parallel
Strand 3
C
225 231anti-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
421 423first strand
Strand 2
C
427 429anti-parallel
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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
D
2 3first strand
Strand 2
D
82 91parallel
Strand 3
D
66 77anti-parallel
Strand 4
D
24 31anti-parallel
Strand 5
D
284 286parallel
Strand 6
D
322 324parallel
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There are 3 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
2 3first strand
Strand 2
D
82 91parallel
Strand 3
D
360 362parallel
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There are 3 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
199 201first strand
Strand 2
D
238 243anti-parallel
Strand 3
D
225 230anti-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
421 423first strand
Strand 2
D
427 429anti-parallel
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