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


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 1XCQ entry

There are 15 chains in PDB entry 1XCQ (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
P
 ARG 17ARG 40
A
 ASP 1CYS 220
B
 GLN 1ARG 218
L
 PRO 17LYS 82
C
 ASP 1CYS 220
D
 GLN 1ARG 218
Q
 SER 2GLY 45
M
 GLU 20GLY 81
E
 ASP 1CYS 220
F
 GLN 1ARG 218
N
 LYS 18GLY 81
S
 SER 2GLY 45
G
 ASP 1GLU 219
H
 GLN 1ARG 218
O
 GLU 20GLY 81
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 29 helices in PDB entry 1XCQ. Click on helix of interest for CSU analysis.
Helix
number 		Helix
ID		Chain
ID		 Initial
residue		Terminal
residue		 Helix class
Helix 1
1
A
85 89Right-handed 310
Helix 2
2
A
127 132Right-handed alpha
Helix 3
3
A
188 194Right-handed alpha
Helix 4
4
A
216 220Right-handed 310
Helix 5
5
B
62 65Right-handed 310
Helix 6
6
B
87 91Right-handed 310
Helix 7
7
B
204 208Right-handed 310
Helix 8
8
L
42 55Right-handed alpha
Helix 9
9
L
57 62Right-handed alpha
Helix 10
10
C
85 89Right-handed 310
Helix 11
11
C
127 133Right-handed alpha
Helix 12
12
C
188 194Right-handed alpha
Helix 13
13
D
87 91Right-handed 310
Helix 14
14
M
42 58Right-handed alpha
Helix 15
15
M
69 72Right-handed 310
Helix 16
16
E
85 89Right-handed 310
Helix 17
17
E
127 132Right-handed 310
Helix 18
18
F
74 76Right-handed 310
Helix 19
19
F
191 193Right-handed 310
Helix 20
20
N
42 46Right-handed 310
Helix 21
21
N
48 57Right-handed alpha
Helix 22
22
G
85 89Right-handed 310
Helix 23
23
G
127 133Right-handed alpha
Helix 24
24
G
189 194Right-handed alpha
Helix 25
25
H
73 76Right-handed 310
Helix 26
26
H
87 91Right-handed 310
Helix 27
27
H
189 193Right-handed 310
Helix 28
28
O
42 56Right-handed alpha
Helix 29
29
O
70 73Right-handed 310
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There are 50 sheets in PDB entry 1XCQ. 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, AO, AP, AQ, AR, AS, AT, AU, AV, AW, AX,

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
5 7first strand
Strand 2
A
21 24anti-parallel
Strand 3
A
77 79anti-parallel
Strand 4
A
70 71anti-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
59 60first strand
Strand 2
A
52 55anti-parallel
Strand 3
A
39 44anti-parallel
Strand 4
A
91 96anti-parallel
Strand 5
A
103 104anti-parallel
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There are 5 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
59 60first strand
Strand 2
A
52 55anti-parallel
Strand 3
A
39 44anti-parallel
Strand 4
A
91 96anti-parallel
Strand 5
A
108 109anti-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
120 124first strand
Strand 2
A
139 145anti-parallel
Strand 3
A
179 183anti-parallel
Strand 4
A
167 169anti-parallel
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There are 2 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
136 137first strand
Strand 2
A
186 187anti-parallel
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There are 2 strands in F sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
A
153 156first strand
Strand 2
A
198 201anti-parallel
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There are 2 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
3 5first strand
Strand 2
B
23 25anti-parallel
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There are 2 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 12first strand
Strand 2
B
115 116parallel
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There are 3 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
17 20first strand
Strand 2
B
79 84anti-parallel
Strand 3
B
69 72anti-parallel
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There are 5 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
58 60first strand
Strand 2
B
45 51anti-parallel
Strand 3
B
34 39anti-parallel
Strand 4
B
97 99anti-parallel
Strand 5
B
105 107anti-parallel
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There are 3 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
147 150first strand
Strand 2
B
180 182anti-parallel
Strand 3
B
174 175anti-parallel
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There are 3 strands in L sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
158 159first strand
Strand 2
B
199 202anti-parallel
Strand 3
B
211 214anti-parallel
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There are 3 strands in M sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
L
34 40first strand
Strand 2
L
22 28anti-parallel
Strand 3
L
74 75parallel
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There are 6 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
10 11first strand
Strand 2
C
108 110parallel
Strand 3
C
91 93anti-parallel
Strand 4
C
40 43anti-parallel
Strand 5
C
51 55anti-parallel
Strand 6
C
59 60anti-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
19 22first strand
Strand 2
C
77 81anti-parallel
Strand 3
C
71 72anti-parallel
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There are 3 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
123 124first strand
Strand 2
C
137 145anti-parallel
Strand 3
C
179 186anti-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
C
159 160first strand
Strand 2
C
151 156anti-parallel
Strand 3
C
198 203anti-parallel
Strand 4
C
214 215anti-parallel
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There are 4 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
3 6first strand
Strand 2
D
18 25anti-parallel
Strand 3
D
78 83anti-parallel
Strand 4
D
68 71anti-parallel
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There are 2 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
10 12first strand
Strand 2
D
114 116parallel
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There are 5 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
58 60first strand
Strand 2
D
46 52anti-parallel
Strand 3
D
33 38anti-parallel
Strand 4
D
97 99anti-parallel
Strand 5
D
105 108anti-parallel
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There are 3 strands in U sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
127 129first strand
Strand 2
D
140 146anti-parallel
Strand 3
D
184 189anti-parallel
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There are 2 strands in V sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
148 150first strand
Strand 2
D
180 181anti-parallel
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There are 3 strands in W sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
156 157first strand
Strand 2
D
202 203anti-parallel
Strand 3
D
210 211anti-parallel
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There are 3 strands in X sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
M
24 28first strand
Strand 2
M
74 78parallel
Strand 3
M
65 66anti-parallel
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There are 4 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
5 7first strand
Strand 2
E
22 24anti-parallel
Strand 3
E
76 83anti-parallel
Strand 4
E
16 20anti-parallel
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There are 4 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
5 7first strand
Strand 2
E
22 24anti-parallel
Strand 3
E
76 83anti-parallel
Strand 4
E
68 72anti-parallel
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There are 6 strands in AA sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
10 14first strand
Strand 2
E
108 113parallel
Strand 3
E
91 96anti-parallel
Strand 4
E
39 43anti-parallel
Strand 5
E
52 55anti-parallel
Strand 6
E
59 60anti-parallel
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There are 2 strands in AB sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
30 31first strand
Strand 2
E
36 37anti-parallel
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There are 3 strands in AC sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
121 123first strand
Strand 2
E
140 145anti-parallel
Strand 3
E
179 181anti-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
E
137 138first strand
Strand 2
E
185 186anti-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
E
159 160first strand
Strand 2
E
151 156anti-parallel
Strand 3
E
197 204anti-parallel
Strand 4
E
207 212anti-parallel
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There are 4 strands in AF sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
159 160first strand
Strand 2
E
151 156anti-parallel
Strand 3
E
197 204anti-parallel
Strand 4
E
215 216anti-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
F
3 6first strand
Strand 2
F
18 25anti-parallel
Strand 3
F
78 83anti-parallel
Strand 4
F
70 72anti-parallel
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There are 2 strands in AH sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
11 12first strand
Strand 2
F
115 116parallel
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There are 4 strands in AI sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
46 49first strand
Strand 2
F
34 39anti-parallel
Strand 3
F
93 98anti-parallel
Strand 4
F
107 108anti-parallel
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There are 3 strands in AJ sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
127 129first strand
Strand 2
F
144 150anti-parallel
Strand 3
F
180 184anti-parallel
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There are 2 strands in AK sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
140 142first strand
Strand 2
F
187 189anti-parallel
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There are 2 strands in AL sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
199 201first strand
Strand 2
F
212 214anti-parallel
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There are 3 strands in AM sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
N
37 41first strand
Strand 2
N
21 26anti-parallel
Strand 3
N
74 76parallel
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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
G
6 7first strand
Strand 2
G
18 24anti-parallel
Strand 3
G
76 83anti-parallel
Strand 4
G
70 71anti-parallel
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There are 4 strands in AO sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
G
52 55first strand
Strand 2
G
40 44anti-parallel
Strand 3
G
91 94anti-parallel
Strand 4
G
108 109anti-parallel
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There are 4 strands in AP sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
G
120 124first strand
Strand 2
G
136 143anti-parallel
Strand 3
G
180 187anti-parallel
Strand 4
G
169 170anti-parallel
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There are 2 strands in AQ sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
G
151 153first strand
Strand 2
G
201 203anti-parallel
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There are 2 strands in AR sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
G
155 156first strand
Strand 2
G
159 160anti-parallel
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There are 2 strands in AS sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
G
197 198first strand
Strand 2
G
215 216anti-parallel
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There are 3 strands in AT sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
H
3 5first strand
Strand 2
H
22 25anti-parallel
Strand 3
H
78 79anti-parallel
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There are 3 strands in AU sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
H
46 50first strand
Strand 2
H
33 38anti-parallel
Strand 3
H
98 99anti-parallel
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There are 3 strands in AV sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
H
125 129first strand
Strand 2
H
141 149anti-parallel
Strand 3
H
180 188anti-parallel
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There are 3 strands in AW sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
H
156 159first strand
Strand 2
H
200 203anti-parallel
Strand 3
H
212 213anti-parallel
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There are 2 strands in AX sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
O
65 68first strand
Strand 2
O
75 78anti-parallel
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