Analysis of interatomic Contacts of Structural Units in PDB entry:
1K23


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 1K23 entry

There are 4 chains in PDB entry 1K23 (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
 MSE 1MSE 307
B
 MSE 1MSE 307
C
 MSE 1ALA 308
D
 MSE 1MSE 307
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 51 helices in PDB entry 1K23. Click on helix of interest for CSU analysis.
Helix
number 		Helix
ID		Chain
ID		 Initial
residue		Terminal
residue		 Helix class
Helix 1
1
A
13 30Right-handed alpha
Helix 2
2
A
43 53Right-handed alpha
Helix 3
3
A
78 82Right-handed 310
Helix 4
4
A
85 89Right-handed 310
Helix 5
5
A
118 130Right-handed alpha
Helix 6
6
A
135 151Right-handed alpha
Helix 7
7
A
159 173Right-handed alpha
Helix 8
8
A
176 187Right-handed alpha
Helix 9
9
A
195 202Right-handed alpha
Helix 10
10
A
208 212Right-handed 310
Helix 11
11
A
223 229Right-handed alpha
Helix 12
12
A
230 245Right-handed alpha
Helix 13
13
A
272 278Right-handed alpha
Helix 14
14
A
299 305Right-handed alpha
Helix 15
15
B
13 30Right-handed alpha
Helix 16
16
B
43 53Right-handed alpha
Helix 17
17
B
78 82Right-handed 310
Helix 18
18
B
85 89Right-handed 310
Helix 19
19
B
118 130Right-handed alpha
Helix 20
20
B
135 151Right-handed alpha
Helix 21
21
B
159 173Right-handed alpha
Helix 22
22
B
176 187Right-handed alpha
Helix 23
23
B
195 200Right-handed alpha
Helix 24
24
B
208 212Right-handed 310
Helix 25
25
B
223 229Right-handed alpha
Helix 26
26
B
230 245Right-handed alpha
Helix 27
27
B
272 278Right-handed alpha
Helix 28
28
B
299 305Right-handed alpha
Helix 29
29
C
13 30Right-handed alpha
Helix 30
30
C
43 53Right-handed alpha
Helix 31
31
C
78 82Right-handed 310
Helix 32
32
C
85 89Right-handed 310
Helix 33
33
C
118 130Right-handed alpha
Helix 34
34
C
135 151Right-handed alpha
Helix 35
35
C
159 173Right-handed alpha
Helix 36
36
C
176 187Right-handed alpha
Helix 37
37
C
195 200Right-handed alpha
Helix 38
38
C
208 212Right-handed 310
Helix 39
39
C
223 229Right-handed alpha
Helix 40
40
C
230 245Right-handed alpha
Helix 41
41
C
272 278Right-handed alpha
Helix 42
42
C
299 305Right-handed alpha
Helix 43
43
D
13 30Right-handed alpha
Helix 44
44
D
43 53Right-handed alpha
Helix 45
45
D
78 82Right-handed 310
Helix 46
46
D
85 89Right-handed 310
Helix 47
47
D
118 130Right-handed alpha
Helix 48
48
D
135 151Right-handed alpha
Helix 49
49
D
159 173Right-handed alpha
Helix 50
50
D
176 187Right-handed alpha
Helix 51
51
D
298 305Right-handed alpha
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There are 6 sheets in PDB entry 1K23. Click on sheet of interest to get list of strands forming it: A, B, C, D, E, F,

There are 12 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
59 60first strand
Strand 2
A
33 38parallel
Strand 3
A
3 7parallel
Strand 4
A
70 74parallel
Strand 5
A
90 96parallel
Strand 6
A
110 113parallel
Strand 7
B
110 113anti-parallel
Strand 8
B
90 96parallel
Strand 9
B
70 74parallel
Strand 10
B
3 7parallel
Strand 11
B
33 38parallel
Strand 12
B
59 60parallel
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There are 5 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
203 207first strand
Strand 2
A
214 221anti-parallel
Strand 3
A
249 256parallel
Strand 4
A
261 268anti-parallel
Strand 5
A
286 289anti-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
B
203 207first strand
Strand 2
B
214 221anti-parallel
Strand 3
B
249 256parallel
Strand 4
B
261 268anti-parallel
Strand 5
B
286 289anti-parallel
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There are 12 strands in D sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
C
59 60first strand
Strand 2
C
33 38parallel
Strand 3
C
3 7parallel
Strand 4
C
70 74parallel
Strand 5
C
90 96parallel
Strand 6
C
110 113parallel
Strand 7
D
110 113anti-parallel
Strand 8
D
90 96parallel
Strand 9
D
70 74parallel
Strand 10
D
3 7parallel
Strand 11
D
33 38parallel
Strand 12
D
59 60parallel
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There are 5 strands in E sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
C
203 207first strand
Strand 2
C
214 221anti-parallel
Strand 3
C
249 256parallel
Strand 4
C
261 268anti-parallel
Strand 5
C
286 289anti-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
D
220 221first strand
Strand 2
D
255 256parallel
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