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


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 3SKN entry

There are 6 chains in PDB entry 3SKN (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
 LYS 2PRO 214
B
 ALA 3ASP 255
C
 LYS 2PRO 214
D
 ALA 3ASP 255
E
 LYS 2PRO 214
F
 ALA 3PHE 211
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 21 helices in PDB entry 3SKN. Click on helix of interest for CSU analysis.
Helix
number 		Helix
ID		Chain
ID		 Initial
residue		Terminal
residue		 Helix class
Helix 1
1
A
95 99Right-handed 310
Helix 2
2
A
176 179Right-handed 310
Helix 3
3
A
196 201Right-handed 310
Helix 4
4
B
127 131Right-handed 310
Helix 5
5
B
142 150Right-handed alpha
Helix 6
6
B
209 214Right-handed alpha
Helix 7
7
C
95 99Right-handed 310
Helix 8
8
C
176 179Right-handed 310
Helix 9
9
D
127 131Right-handed 310
Helix 10
10
D
142 150Right-handed alpha
Helix 11
11
D
209 214Right-handed alpha
Helix 12
12
E
95 99Right-handed 310
Helix 13
13
E
176 179Right-handed 310
Helix 14
14
F
127 131Right-handed 310
Helix 15
15
F
142 150Right-handed alpha
Helix 16
16
F
209 214Right-handed alpha
Helix 17
17
G
95 99Right-handed 310
Helix 18
18
G
176 179Right-handed 310
Helix 19
19
H
127 131Right-handed 310
Helix 20
20
H
142 150Right-handed alpha
Helix 21
21
H
209 214Right-handed alpha
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There are 40 sheets in PDB entry 3SKN. Click on sheet of interest to get list of strands forming it: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, AA, AB, AC, AD, AE, AF, AG, AH, AI, AJ, AK, AL, AM, AN,

There are 4 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
4 6first strand
Strand 2
A
19 25anti-parallel
Strand 3
A
86 91anti-parallel
Strand 4
A
79 84anti-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
11 14first strand
Strand 2
A
117 122parallel
Strand 3
A
100 106anti-parallel
Strand 4
A
39 44anti-parallel
Strand 5
A
51 56anti-parallel
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There are 4 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
11 14first strand
Strand 2
A
117 122parallel
Strand 3
A
100 106anti-parallel
Strand 4
A
112 113anti-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
131 135first strand
Strand 2
A
145 149anti-parallel
Strand 3
A
180 189anti-parallel
Strand 4
A
165 167anti-parallel
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There are 4 strands in E sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
A
131 135first strand
Strand 2
A
145 149anti-parallel
Strand 3
A
180 189anti-parallel
Strand 4
A
171 175anti-parallel
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There are 4 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
5 8first strand
Strand 2
B
20 26anti-parallel
Strand 3
B
88 91anti-parallel
Strand 4
B
77 79anti-parallel
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There are 5 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
11 15first strand
Strand 2
B
120 125parallel
Strand 3
B
100 107anti-parallel
Strand 4
B
32 45anti-parallel
Strand 5
B
48 56anti-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
11 15first strand
Strand 2
B
120 125parallel
Strand 3
B
100 107anti-parallel
Strand 4
B
115 116anti-parallel
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There are 4 strands in I sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
135 139first strand
Strand 2
B
151 161anti-parallel
Strand 3
B
199 208anti-parallel
Strand 4
B
181 183anti-parallel
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There are 4 strands in J sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
135 139first strand
Strand 2
B
151 161anti-parallel
Strand 3
B
199 208anti-parallel
Strand 4
B
188 189anti-parallel
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There are 4 strands in K sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
175 177first strand
Strand 2
B
166 172anti-parallel
Strand 3
B
218 225anti-parallel
Strand 4
B
245 251anti-parallel
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There are 4 strands in L sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
C
5 6first strand
Strand 2
C
19 24anti-parallel
Strand 3
C
86 91anti-parallel
Strand 4
C
79 84anti-parallel
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There are 5 strands in M sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
C
11 14first strand
Strand 2
C
117 122parallel
Strand 3
C
100 107anti-parallel
Strand 4
C
32 44anti-parallel
Strand 5
C
50 55anti-parallel
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There are 4 strands in N sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
C
11 14first strand
Strand 2
C
117 122parallel
Strand 3
C
100 107anti-parallel
Strand 4
C
112 113anti-parallel
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There are 3 strands in O sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
C
165 167first strand
Strand 2
C
180 189anti-parallel
Strand 3
C
171 175anti-parallel
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There are 8 strands in P sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
C
165 167first strand
Strand 2
C
180 189anti-parallel
Strand 3
C
145 149anti-parallel
Strand 4
C
131 137anti-parallel
Strand 5
D
138 140anti-parallel
Strand 6
D
151 161anti-parallel
Strand 7
D
199 208anti-parallel
Strand 8
D
181 183anti-parallel
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There are 4 strands in Q sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
5 8first strand
Strand 2
D
20 26anti-parallel
Strand 3
D
88 91anti-parallel
Strand 4
D
77 79anti-parallel
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There are 5 strands in R sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
11 15first strand
Strand 2
D
120 125parallel
Strand 3
D
100 107anti-parallel
Strand 4
D
32 45anti-parallel
Strand 5
D
48 56anti-parallel
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There are 4 strands in S sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
11 15first strand
Strand 2
D
120 125parallel
Strand 3
D
100 107anti-parallel
Strand 4
D
115 116anti-parallel
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There are 4 strands in T sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
175 177first strand
Strand 2
D
166 172anti-parallel
Strand 3
D
218 225anti-parallel
Strand 4
D
244 251anti-parallel
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There are 4 strands in U sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
4 6first strand
Strand 2
E
19 25anti-parallel
Strand 3
E
86 91anti-parallel
Strand 4
E
79 84anti-parallel
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There are 4 strands in V sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
51 56first strand
Strand 2
E
39 44anti-parallel
Strand 3
E
100 106anti-parallel
Strand 4
E
112 113anti-parallel
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There are 4 strands in W sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
51 56first strand
Strand 2
E
39 44anti-parallel
Strand 3
E
100 106anti-parallel
Strand 4
E
117 119anti-parallel
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There are 8 strands in X sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
165 167first strand
Strand 2
E
184 189anti-parallel
Strand 3
E
145 149anti-parallel
Strand 4
E
131 137anti-parallel
Strand 5
F
135 140anti-parallel
Strand 6
F
151 161anti-parallel
Strand 7
F
199 208anti-parallel
Strand 8
F
181 183anti-parallel
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There are 8 strands in Y sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
165 167first strand
Strand 2
E
184 189anti-parallel
Strand 3
E
145 149anti-parallel
Strand 4
E
131 137anti-parallel
Strand 5
F
135 140anti-parallel
Strand 6
F
151 161anti-parallel
Strand 7
F
199 208anti-parallel
Strand 8
F
188 189anti-parallel
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There are 2 strands in Z sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
173 175first strand
Strand 2
E
180 182anti-parallel
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There are 4 strands in AA sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
5 8first strand
Strand 2
F
20 26anti-parallel
Strand 3
F
86 91anti-parallel
Strand 4
F
77 79anti-parallel
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There are 5 strands in AB sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
11 15first strand
Strand 2
F
120 125parallel
Strand 3
F
100 107anti-parallel
Strand 4
F
32 44anti-parallel
Strand 5
F
50 56anti-parallel
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There are 4 strands in AC sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
11 15first strand
Strand 2
F
120 125parallel
Strand 3
F
100 107anti-parallel
Strand 4
F
114 116anti-parallel
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There are 4 strands in AD sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
175 177first strand
Strand 2
F
166 172anti-parallel
Strand 3
F
218 225anti-parallel
Strand 4
F
245 251anti-parallel
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There are 4 strands in AE sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
G
4 6first strand
Strand 2
G
19 25anti-parallel
Strand 3
G
86 91anti-parallel
Strand 4
G
79 84anti-parallel
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There are 5 strands in AF sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
G
11 14first strand
Strand 2
G
117 122parallel
Strand 3
G
100 107anti-parallel
Strand 4
G
32 44anti-parallel
Strand 5
G
51 55anti-parallel
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There are 4 strands in AG sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
G
11 14first strand
Strand 2
G
117 122parallel
Strand 3
G
100 107anti-parallel
Strand 4
G
112 113anti-parallel
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There are 4 strands in AH sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
G
131 135first strand
Strand 2
G
145 149anti-parallel
Strand 3
G
184 189anti-parallel
Strand 4
G
165 167anti-parallel
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There are 2 strands in AI sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
G
173 175first strand
Strand 2
G
180 182anti-parallel
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There are 4 strands in AJ sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
H
5 8first strand
Strand 2
H
21 26anti-parallel
Strand 3
H
88 90anti-parallel
Strand 4
H
78 79anti-parallel
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There are 5 strands in AK sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
H
11 15first strand
Strand 2
H
120 125parallel
Strand 3
H
101 107anti-parallel
Strand 4
H
32 44anti-parallel
Strand 5
H
54 56anti-parallel
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There are 4 strands in AL sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
H
11 15first strand
Strand 2
H
120 125parallel
Strand 3
H
101 107anti-parallel
Strand 4
H
115 116anti-parallel
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There are 4 strands in AM sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
H
138 139first strand
Strand 2
H
151 161anti-parallel
Strand 3
H
199 208anti-parallel
Strand 4
H
188 189anti-parallel
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There are 4 strands in AN sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
H
175 176first strand
Strand 2
H
166 172anti-parallel
Strand 3
H
219 225anti-parallel
Strand 4
H
244 248anti-parallel
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