Analysis of interatomic Contacts of Structural Units in PDB entry:
2X23


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 2X23 entry

There are 4 chains in PDB entry 2X23 (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
 THR 2LEU 269
B
 THR 2LEU 269
E
 THR 2LEU 269
G
 THR 2LEU 269
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 53 helices in PDB entry 2X23. Click on helix of interest for CSU analysis.
Helix
number 		Helix
ID		Chain
ID		 Initial
residue		Terminal
residue		 Helix class
Helix 1
1
A
20 32Right-handed alpha
Helix 2
2
A
43 52Right-handed alpha
Helix 3
3
A
67 73Right-handed alpha
Helix 4
4
A
73 83Right-handed alpha
Helix 5
5
A
99 103Right-handed 310
Helix 6
6
A
107 111Right-handed 310
Helix 7
7
A
112 124Right-handed alpha
Helix 8
8
A
124 135Right-handed alpha
Helix 9
9
A
158 181Right-handed alpha
Helix 10
10
A
196 202Right-handed alpha
Helix 11
11
A
202 208Right-handed alpha
Helix 12
12
A
210 226Right-handed alpha
Helix 13
13
A
235 247Right-handed alpha
Helix 14
14
A
263 266Right-handed 310
Helix 15
15
B
20 32Right-handed alpha
Helix 16
16
B
43 52Right-handed alpha
Helix 17
17
B
67 83Right-handed alpha
Helix 18
18
B
99 103Right-handed 310
Helix 19
19
B
107 111Right-handed 310
Helix 20
20
B
112 124Right-handed alpha
Helix 21
21
B
124 135Right-handed alpha
Helix 22
22
B
158 181Right-handed alpha
Helix 23
23
B
196 202Right-handed alpha
Helix 24
24
B
202 207Right-handed alpha
Helix 25
25
B
210 226Right-handed alpha
Helix 26
26
B
235 247Right-handed alpha
Helix 27
27
B
263 266Right-handed 310
Helix 28
28
E
20 32Right-handed alpha
Helix 29
29
E
43 52Right-handed alpha
Helix 30
30
E
67 83Right-handed alpha
Helix 31
31
E
99 103Right-handed 310
Helix 32
32
E
107 111Right-handed 310
Helix 33
33
E
112 124Right-handed alpha
Helix 34
34
E
124 135Right-handed alpha
Helix 35
35
E
158 181Right-handed alpha
Helix 36
36
E
196 202Right-handed alpha
Helix 37
37
E
202 208Right-handed alpha
Helix 38
38
E
210 226Right-handed alpha
Helix 39
39
E
235 247Right-handed alpha
Helix 40
40
E
263 266Right-handed 310
Helix 41
41
G
20 32Right-handed alpha
Helix 42
42
G
43 52Right-handed alpha
Helix 43
43
G
67 83Right-handed alpha
Helix 44
44
G
99 103Right-handed 310
Helix 45
45
G
107 111Right-handed 310
Helix 46
46
G
112 124Right-handed alpha
Helix 47
47
G
124 135Right-handed alpha
Helix 48
48
G
158 181Right-handed alpha
Helix 49
49
G
196 202Right-handed alpha
Helix 50
50
G
202 207Right-handed alpha
Helix 51
51
G
211 226Right-handed alpha
Helix 52
52
G
235 247Right-handed alpha
Helix 53
53
G
263 266Right-handed 310
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There are 4 sheets in PDB entry 2X23. Click on sheet of interest to get list of strands forming it: AA, BA, EA, GA,

There are 7 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
60 62first strand
Strand 2
A
35 40parallel
Strand 3
A
9 13parallel
Strand 4
A
88 93parallel
Strand 5
A
138 148parallel
Strand 6
A
185 191parallel
Strand 7
A
256 260parallel
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There are 7 strands in BA sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
60 62first strand
Strand 2
B
35 40parallel
Strand 3
B
9 13parallel
Strand 4
B
88 93parallel
Strand 5
B
138 148parallel
Strand 6
B
185 191parallel
Strand 7
B
256 260parallel
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There are 7 strands in EA sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
60 62first strand
Strand 2
E
35 40parallel
Strand 3
E
9 13parallel
Strand 4
E
88 93parallel
Strand 5
E
138 148parallel
Strand 6
E
185 191parallel
Strand 7
E
256 260parallel
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There are 7 strands in GA sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
G
60 62first strand
Strand 2
G
35 40parallel
Strand 3
G
9 13parallel
Strand 4
G
88 93parallel
Strand 5
G
138 148parallel
Strand 6
G
185 191parallel
Strand 7
G
256 260parallel
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