Analysis of interatomic
Contacts of Structural
Units in PDB entry:
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, 327332).
This page provides analyses of
contacts formed by:
For analysis of ligandprotein contacts, use:
3D structure can be seen in additional window with
STING software for 4Z3A entry
There are 4 chains in PDB entry 4Z3A
(CSU analysis of residue contacts immediately below table)
Chain ID 
Initial residue  Terminal residue 
A

GLY 105  GLY 301 
C

C 1  T 28 
D

A 1  A 16 
D

G 18  G 28 
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There are 10
helices in PDB entry 4Z3A. Click on helix of interest for
CSU analysis.
Helix number
 Helix ID  Chain ID 
Initial residue  Terminal residue 
Helix class 
Helix 1 
AA1  A
 107 
112  Righthanded 310 
Helix 2 
AA2  A
 115 
121  Righthanded alpha 
Helix 3 
AA3  A
 142 
149  Righthanded alpha 
Helix 4 
AA4  A
 158 
166  Righthanded alpha 
Helix 5 
AA5  A
 174 
179  Righthanded 310 
Helix 6 
AA6  A
 180 
186  Righthanded alpha 
Helix 7 
AA7  A
 199 
203  Righthanded 310 
Helix 8 
AA8  A
 204 
223  Righthanded alpha 
Helix 9 
AA9  A
 231 
243  Righthanded alpha 
Helix 10 
AB1  A
 281 
300  Righthanded alpha 
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There is
1 sheet (AA1) in PDB entry 4Z3A.
There are 5
strands in AA1 sheet. Click on strand of interest
for CSU analysis.
Strand number
 Chain ID 
Initial residue  Terminal residue 
Strand sense 
Strand 1 
A
 187 
191  first strand 
Strand 2 
A
 134 
138  parallel 
Strand 3 
A
 226 
230  parallel 
Strand 4 
A
 265 
269  parallel 
Strand 5 
A
 253 
258  antiparallel 
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Please mail
questions/suggestions concerning this page
to
Vladimir.Sobolev@weizmann.
ac.il