Analysis of interatomic Contacts of Structural Units in PDB entry:
4R20


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 4R20 entry

There are 2 chains in PDB entry 4R20 (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
 PRO 55HIS 495
B
 ASN 53HIS 496
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 36 helices in PDB entry 4R20. Click on helix of interest for CSU analysis.
Helix
number 		Helix
ID		Chain
ID		 Initial
residue		Terminal
residue		 Helix class
Helix 1
1
A
55 65Right-handed alpha
Helix 2
2
A
85 94Right-handed alpha
Helix 3
3
A
107 114Right-handed alpha
Helix 4
4
A
125 140Right-handed alpha
Helix 5
5
A
150 165Right-handed alpha
Helix 6
6
A
166 168Right-handed 310
Helix 7
7
A
175 192Right-handed alpha
Helix 8
8
A
203 218Right-handed alpha
Helix 9
9
A
237 257Right-handed alpha
Helix 10
10
A
268 280Right-handed alpha
Helix 11
11
A
289 321Right-handed alpha
Helix 12
12
A
321 336Right-handed alpha
Helix 13
13
A
343 349Right-handed 310
Helix 14
14
A
350 364Right-handed alpha
Helix 15
15
A
395 401Right-handed alpha
Helix 16
16
A
413 418Right-handed 310
Helix 17
17
A
435 439Right-handed 310
Helix 18
18
A
442 460Right-handed alpha
Helix 19
19
B
55 67Right-handed alpha
Helix 20
20
B
85 94Right-handed alpha
Helix 21
21
B
106 113Right-handed alpha
Helix 22
22
B
125 138Right-handed alpha
Helix 23
23
B
150 165Right-handed alpha
Helix 24
24
B
166 168Right-handed 310
Helix 25
25
B
175 192Right-handed alpha
Helix 26
26
B
201 218Right-handed alpha
Helix 27
27
B
239 260Right-handed alpha
Helix 28
28
B
268 279Right-handed alpha
Helix 29
29
B
288 321Right-handed alpha
Helix 30
30
B
321 336Right-handed alpha
Helix 31
31
B
343 349Right-handed 310
Helix 32
32
B
350 364Right-handed alpha
Helix 33
33
B
395 400Right-handed alpha
Helix 34
34
B
413 418Right-handed 310
Helix 35
35
B
435 439Right-handed 310
Helix 36
36
B
442 461Right-handed alpha
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There are 7 sheets in PDB entry 4R20. Click on sheet of interest to get list of strands forming it: A, B, C, D, E, F, G,

There are 4 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
70 75first strand
Strand 2
A
78 83anti-parallel
Strand 3
A
391 394parallel
Strand 4
A
373 374anti-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
170 172first strand
Strand 2
A
489 493anti-parallel
Strand 3
A
461 464anti-parallel
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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
379 381first strand
Strand 2
A
384 386anti-parallel
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There are 2 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
477 478first strand
Strand 2
A
482 483anti-parallel
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There are 4 strands in E sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
70 73first strand
Strand 2
B
80 83anti-parallel
Strand 3
B
391 394parallel
Strand 4
B
373 374anti-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
379 381first strand
Strand 2
B
384 386anti-parallel
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There are 2 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
477 478first strand
Strand 2
B
482 483anti-parallel
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Please mail questions/suggestions concerning this page to Vladimir.Sobolev@weizmann. ac.il