Analysis of interatomic Contacts of Structural Units in PDB entry:
1SQ4


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 1SQ4 entry

There are 2 chains in PDB entry 1SQ4 (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
 LYS 3ASN 275
B
 LYS 3ASN 275
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 8 helices in PDB entry 1SQ4. Click on helix of interest for CSU analysis.
Helix
number 		Helix
ID		Chain
ID		 Initial
residue		Terminal
residue		 Helix class
Helix 1
1
A
34 38Right-handed 310
Helix 2
2
A
39 43Right-handed 310
Helix 3
3
A
162 164Right-handed 310
Helix 4
4
A
171 174Right-handed 310
Helix 5
5
B
34 38Right-handed 310
Helix 6
6
B
39 43Right-handed 310
Helix 7
7
B
162 164Right-handed 310
Helix 8
8
B
171 174Right-handed 310
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There are 8 sheets in PDB entry 1SQ4. Click on sheet of interest to get list of strands forming it: A, B, C, D, E, F, G, H,

There are 8 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
25 26first strand
Strand 2
A
30 33anti-parallel
Strand 3
A
239 244anti-parallel
Strand 4
A
212 220anti-parallel
Strand 5
A
258 265anti-parallel
Strand 6
A
191 198anti-parallel
Strand 7
A
176 179anti-parallel
Strand 8
A
167 168anti-parallel
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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
50 57first strand
Strand 2
A
69 81anti-parallel
Strand 3
A
126 129anti-parallel
Strand 4
A
101 105anti-parallel
Strand 5
A
109 112anti-parallel
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There are 6 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
50 57first strand
Strand 2
A
69 81anti-parallel
Strand 3
A
136 144anti-parallel
Strand 4
A
90 98anti-parallel
Strand 5
A
116 120anti-parallel
Strand 6
A
157 160anti-parallel
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There are 4 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
203 204first strand
Strand 2
A
248 251anti-parallel
Strand 3
A
222 227anti-parallel
Strand 4
A
230 235anti-parallel
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There are 8 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
25 26first strand
Strand 2
B
30 33anti-parallel
Strand 3
B
239 242anti-parallel
Strand 4
B
214 220anti-parallel
Strand 5
B
258 265anti-parallel
Strand 6
B
191 198anti-parallel
Strand 7
B
176 179anti-parallel
Strand 8
B
167 168anti-parallel
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There are 5 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
50 56first strand
Strand 2
B
69 81anti-parallel
Strand 3
B
126 129anti-parallel
Strand 4
B
101 105anti-parallel
Strand 5
B
108 112anti-parallel
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There are 6 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
50 56first strand
Strand 2
B
69 81anti-parallel
Strand 3
B
136 144anti-parallel
Strand 4
B
90 98anti-parallel
Strand 5
B
116 120anti-parallel
Strand 6
B
157 160anti-parallel
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There are 4 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
203 204first strand
Strand 2
B
248 251anti-parallel
Strand 3
B
222 227anti-parallel
Strand 4
B
230 235anti-parallel
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