Analysis of interatomic Contacts of Structural Units in PDB entry:
2XEM


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 2XEM entry

There are 4 chains in PDB entry 2XEM (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
 HIS 4VAL 148
B
 ASP 9ARG 144
C
 ASP 9VAL 147
D
 HIS 4ALA 149
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 16 helices in PDB entry 2XEM. Click on helix of interest for CSU analysis.
Helix
number 		Helix
ID		Chain
ID		 Initial
residue		Terminal
residue		 Helix class
Helix 1
1
A
18 21Right-handed 310
Helix 2
2
A
31 49Right-handed alpha
Helix 3
3
A
49 56Right-handed alpha
Helix 4
4
A
135 146Right-handed alpha
Helix 5
5
B
18 21Right-handed 310
Helix 6
6
B
31 49Right-handed alpha
Helix 7
7
B
49 59Right-handed alpha
Helix 8
8
B
135 144Right-handed alpha
Helix 9
9
C
18 21Right-handed 310
Helix 10
10
C
31 49Right-handed alpha
Helix 11
11
C
49 56Right-handed alpha
Helix 12
12
C
135 146Right-handed alpha
Helix 13
13
D
18 21Right-handed 310
Helix 14
14
D
31 49Right-handed alpha
Helix 15
15
D
49 56Right-handed alpha
Helix 16
16
D
135 144Right-handed alpha
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There are 10 sheets in PDB entry 2XEM. Click on sheet of interest to get list of strands forming it: AA, AB, AC, AD, CA, BA, BB, BC, BD, A,

There are 5 strands in AA sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
A
11 16first strand
Strand 2
A
80 91anti-parallel
Strand 3
A
94 105anti-parallel
Strand 4
A
110 125anti-parallel
Strand 5
A
128 131anti-parallel
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There are 8 strands in AB sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
A
11 16first strand
Strand 2
A
80 91anti-parallel
Strand 3
A
94 105anti-parallel
Strand 4
A
110 125anti-parallel
Strand 5
A
60 71anti-parallel
Strand 6
C
60 71anti-parallel
Strand 7
C
110 124anti-parallel
Strand 8
C
129 131anti-parallel
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There are 10 strands in AC sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
A
11 16first strand
Strand 2
A
80 91anti-parallel
Strand 3
A
94 105anti-parallel
Strand 4
A
110 125anti-parallel
Strand 5
A
60 71anti-parallel
Strand 6
C
60 71anti-parallel
Strand 7
C
110 124anti-parallel
Strand 8
C
94 105anti-parallel
Strand 9
C
80 90anti-parallel
Strand 10
C
11 16anti-parallel
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There are 2 strands in AD sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
A
128 131first strand
Strand 2
A
110 125anti-parallel
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There are 2 strands in CA sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
C
129 131first strand
Strand 2
C
110 124anti-parallel
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There are 5 strands in BA sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
11 16first strand
Strand 2
B
80 91anti-parallel
Strand 3
B
94 105anti-parallel
Strand 4
B
110 123anti-parallel
Strand 5
B
130 131anti-parallel
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There are 8 strands in BB sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
11 16first strand
Strand 2
B
80 91anti-parallel
Strand 3
B
94 105anti-parallel
Strand 4
B
110 123anti-parallel
Strand 5
B
60 71anti-parallel
Strand 6
D
60 71anti-parallel
Strand 7
D
110 124anti-parallel
Strand 8
D
129 131anti-parallel
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There are 10 strands in BC sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
11 16first strand
Strand 2
B
80 91anti-parallel
Strand 3
B
94 105anti-parallel
Strand 4
B
110 123anti-parallel
Strand 5
B
60 71anti-parallel
Strand 6
D
60 71anti-parallel
Strand 7
D
110 124anti-parallel
Strand 8
D
94 105anti-parallel
Strand 9
D
80 91anti-parallel
Strand 10
D
11 16anti-parallel
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There are 2 strands in BD sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
130 131first strand
Strand 2
B
110 123anti-parallel
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There are 2 strands in A sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
129 131first strand
Strand 2
D
110 124anti-parallel
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