Analysis of interatomic Contacts of Structural Units in PDB entry:
3U21


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 3U21 entry

There are 12 chains in PDB entry 3U21 (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
 ILE 372PHE 451
A
 GLU 453GLU 453
A
 THR 455TRP 458
A
 LEU 460GLU 468
A
 GLU 470THR 481
A
 ASP 483ASP 483
B
 LEU 370PHE 451
B
 GLU 453GLU 453
B
 THR 455TRP 458
B
 LEU 460GLU 468
B
 GLU 470THR 481
B
 ASP 483ASP 483
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 14 helices in PDB entry 3U21. Click on helix of interest for CSU analysis.
Helix
number 		Helix
ID		Chain
ID		 Initial
residue		Terminal
residue		 Helix class
Helix 1
1
A
378 389Right-handed alpha
Helix 2
2
A
395 407Right-handed alpha
Helix 3
3
A
408 414Right-handed 310
Helix 4
4
A
416 420Right-handed 310
Helix 5
5
A
423 425Right-handed 310
Helix 6
6
A
426 435Right-handed alpha
Helix 7
7
A
467 482Right-handed alpha
Helix 8
8
B
378 391Right-handed alpha
Helix 9
9
B
394 408Right-handed alpha
Helix 10
10
B
409 414Right-handed 310
Helix 11
11
B
416 420Right-handed 310
Helix 12
12
B
422 425Right-handed 310
Helix 13
13
B
426 435Right-handed alpha
Helix 14
14
B
467 482Right-handed alpha
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There are 2 sheets in PDB entry 3U21. Click on sheet of interest to get list of strands forming it: A, B,

There are 3 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
392 394first strand
Strand 2
A
457 460anti-parallel
Strand 3
A
449 452anti-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
B
392 393first strand
Strand 2
B
457 460anti-parallel
Strand 3
B
449 452anti-parallel
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Please mail questions/suggestions concerning this page to Vladimir.Sobolev@weizmann. ac.il