Analysis of interatomic Contacts of Structural Units in PDB entry:
1A21


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 1A21 entry

There are 2 chains in PDB entry 1A21 (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
 THR 4THR 208
B
 THR 4THR 208
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 6 helices in PDB entry 1A21. Click on helix of interest for CSU analysis.
Helix
number 		Helix
ID		Chain
ID		 Initial
residue		Terminal
residue		 Helix class
Helix 1
1
A
58 63Right-handed alpha
Helix 2
2
A
100 103Right-handed alpha
Helix 3
3
A
141 148Right-handed alpha
Helix 4
4
B
58 63Right-handed alpha
Helix 5
5
B
100 103Right-handed alpha
Helix 6
6
B
141 148Right-handed alpha
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There are 8 sheets in PDB entry 1A21. Click on sheet of interest to get list of strands forming it: A, B, C, D, E, F, G, H,

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
11 15first strand
Strand 2
A
18 22anti-parallel
Strand 3
A
54 56anti-parallel
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There are 4 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
91 94first strand
Strand 2
A
70 77anti-parallel
Strand 3
A
30 37anti-parallel
Strand 4
A
44 47anti-parallel
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There are 3 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
172 176first strand
Strand 2
A
120 125anti-parallel
Strand 3
A
111 117anti-parallel
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There are 3 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
184 190first strand
Strand 2
A
150 156anti-parallel
Strand 3
A
164 168anti-parallel
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There are 3 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
11 15first strand
Strand 2
B
18 22anti-parallel
Strand 3
B
54 56anti-parallel
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There are 3 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
70 77first strand
Strand 2
B
30 37anti-parallel
Strand 3
B
44 47anti-parallel
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There are 3 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
172 176first strand
Strand 2
B
120 125anti-parallel
Strand 3
B
111 117anti-parallel
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There are 3 strands in H sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
184 190first strand
Strand 2
B
150 156anti-parallel
Strand 3
B
164 168anti-parallel
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Please mail questions/suggestions concerning this page to Vladimir.Sobolev@weizmann. ac.il