Analysis of interatomic Contacts of Structural Units in PDB entry:
1K20


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 1K20 entry

There are 2 chains in PDB entry 1K20 (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
 SER 2ALA 311
B
 SER 2ALA 311
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 31 helices in PDB entry 1K20. 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 32Right-handed alpha
Helix 2
2
A
44 55Right-handed alpha
Helix 3
3
A
65 69Right-handed 310
Helix 4
4
A
80 84Right-handed 310
Helix 5
5
A
87 91Right-handed 310
Helix 6
6
A
120 132Right-handed alpha
Helix 7
7
A
137 153Right-handed alpha
Helix 8
8
A
161 176Right-handed alpha
Helix 9
9
A
178 189Right-handed alpha
Helix 10
10
A
197 202Right-handed alpha
Helix 11
11
A
225 231Right-handed alpha
Helix 12
12
A
232 248Right-handed alpha
Helix 13
13
A
272 281Right-handed alpha
Helix 14
14
A
296 301Right-handed alpha
Helix 15
15
A
301 311Right-handed alpha
Helix 16
16
B
13 32Right-handed alpha
Helix 17
17
B
44 55Right-handed alpha
Helix 18
18
B
80 84Right-handed 310
Helix 19
19
B
87 91Right-handed 310
Helix 20
20
B
120 132Right-handed alpha
Helix 21
21
B
137 153Right-handed alpha
Helix 22
22
B
161 176Right-handed alpha
Helix 23
23
B
178 189Right-handed alpha
Helix 24
24
B
190 191Right-handed 310
Helix 25
25
B
192 196Right-handed 310
Helix 26
26
B
197 202Right-handed alpha
Helix 27
27
B
225 231Right-handed alpha
Helix 28
28
B
232 248Right-handed alpha
Helix 29
29
B
272 281Right-handed alpha
Helix 30
30
B
296 301Right-handed alpha
Helix 31
31
B
301 311Right-handed alpha
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There are 3 sheets in PDB entry 1K20. Click on sheet of interest to get list of strands forming it: A, B, C,

There are 10 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
35 37first strand
Strand 2
A
4 7parallel
Strand 3
A
72 76parallel
Strand 4
A
92 98parallel
Strand 5
A
112 115parallel
Strand 6
B
112 115anti-parallel
Strand 7
B
92 98parallel
Strand 8
B
72 76parallel
Strand 9
B
4 7parallel
Strand 10
B
35 37parallel
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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
206 211first strand
Strand 2
A
214 223anti-parallel
Strand 3
A
251 258parallel
Strand 4
A
263 270anti-parallel
Strand 5
A
288 292anti-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
206 211first strand
Strand 2
B
214 223anti-parallel
Strand 3
B
251 258parallel
Strand 4
B
263 270anti-parallel
Strand 5
B
288 291anti-parallel
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Please mail questions/suggestions concerning this page to Vladimir.Sobolev@weizmann. ac.il