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

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).
This page provides analyses of contacts formed by:

chains
helices
sheets
residues

For analysis of ligand-protein contacts, use:

LPC software

3D structure can be seen in additional window with STING software for 2XCS entry

There are 4 chains in PDB entry 2XCS (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
B	LYS 417	GLY 1491
D	LYS 417	LEU 1490
E	G 2	T 20
F	G 2	C 19

There are 58 helices in PDB entry 2XCS. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	B	436	447	Right-handed alpha
Helix 2	2	B	468	474	Right-handed alpha
Helix 3	3	B	475	486	Right-handed alpha
Helix 4	4	B	489	493	Right-handed 310
Helix 5	5	B	494	498	Right-handed 310
Helix 6	6	B	510	528	Right-handed alpha
Helix 7	7	B	528	534	Right-handed alpha
Helix 8	8	B	582	586	Right-handed 310
Helix 9	9	B	587	596	Right-handed alpha
Helix 10	10	B	610	623	Right-handed alpha
Helix 11	11	B	625	637	Right-handed alpha
Helix 12	12	B	1014	1033	Right-handed alpha
Helix 13	13	B	1043	1056	Right-handed alpha
Helix 14	14	B	1067	1078	Right-handed alpha
Helix 15	15	B	1082	1095	Right-handed alpha
Helix 16	16	B	1129	1137	Right-handed alpha
Helix 17	17	B	1165	1171	Right-handed alpha
Helix 18	18	B	1187	1200	Right-handed alpha
Helix 19	19	B	1205	1210	Right-handed alpha
Helix 20	20	B	1227	1237	Right-handed alpha
Helix 21	21	B	1269	1283	Right-handed alpha
Helix 22	22	B	1313	1325	Right-handed alpha
Helix 23	23	B	1347	1390	Right-handed alpha
Helix 24	24	B	1390	1400	Right-handed alpha
Helix 25	25	B	1403	1416	Right-handed alpha
Helix 26	26	B	1418	1427	Right-handed alpha
Helix 27	27	B	1430	1434	Right-handed 310
Helix 28	28	B	1436	1461	Right-handed alpha
Helix 29	29	B	1461	1481	Right-handed alpha
Helix 30	30	D	436	447	Right-handed alpha
Helix 31	31	D	468	475	Right-handed alpha
Helix 32	32	D	475	486	Right-handed alpha
Helix 33	33	D	489	493	Right-handed 310
Helix 34	34	D	494	498	Right-handed 310
Helix 35	35	D	510	528	Right-handed alpha
Helix 36	36	D	528	534	Right-handed alpha
Helix 37	37	D	582	586	Right-handed 310
Helix 38	38	D	587	596	Right-handed alpha
Helix 39	39	D	610	623	Right-handed alpha
Helix 40	40	D	625	637	Right-handed alpha
Helix 41	41	D	1014	1032	Right-handed alpha
Helix 42	42	D	1043	1056	Right-handed alpha
Helix 43	43	D	1067	1078	Right-handed alpha
Helix 44	44	D	1082	1094	Right-handed alpha
Helix 45	45	D	1129	1137	Right-handed alpha
Helix 46	46	D	1165	1171	Right-handed alpha
Helix 47	47	D	1187	1201	Right-handed alpha
Helix 48	48	D	1205	1210	Right-handed alpha
Helix 49	49	D	1227	1237	Right-handed alpha
Helix 50	50	D	1269	1283	Right-handed alpha
Helix 51	51	D	1313	1325	Right-handed alpha
Helix 52	52	D	1347	1390	Right-handed alpha
Helix 53	53	D	1390	1400	Right-handed alpha
Helix 54	54	D	1403	1416	Right-handed alpha
Helix 55	55	D	1418	1428	Right-handed alpha
Helix 56	56	D	1430	1433	Right-handed 310
Helix 57	57	D	1434	1461	Right-handed alpha
Helix 58	58	D	1461	1481	Right-handed alpha

There are 14 sheets in PDB entry 2XCS. Click on sheet of interest to get list of strands forming it: BA, BB, BC, BD, BE, BF, BG, A, DB, C, DD, DE, DF, G,

There are 6 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	452	456	first strand
Strand 2	B	430	434	parallel
Strand 3	B	502	505	parallel
Strand 4	B	537	539	parallel
Strand 5	B	604	607	anti-parallel
Strand 6	B	1011	1013	parallel

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There are 3 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	1065	1066	first strand
Strand 2	B	1125	1128	anti-parallel
Strand 3	B	1104	1107	anti-parallel

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There are 2 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	1146	1148	first strand
Strand 2	B	1155	1157	anti-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	1172	1175	first strand
Strand 2	B	1180	1183	anti-parallel

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There are 4 strands in BE sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	1328	1334	first strand
Strand 2	B	1238	1244	anti-parallel
Strand 3	B	1223	1225	anti-parallel
Strand 4	B	1487	1489	parallel

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There are 4 strands in BF sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	1246	1253	first strand
Strand 2	B	1256	1263	anti-parallel
Strand 3	B	1304	1308	anti-parallel
Strand 4	B	1289	1294	anti-parallel

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There are 2 strands in BG sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	1336	1339	first strand
Strand 2	B	1342	1345	anti-parallel

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There are 6 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	452	456	first strand
Strand 2	D	430	434	parallel
Strand 3	D	502	505	parallel
Strand 4	D	537	539	parallel
Strand 5	D	604	607	anti-parallel
Strand 6	D	1011	1013	parallel

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There are 3 strands in DB sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	1065	1066	first strand
Strand 2	D	1125	1128	anti-parallel
Strand 3	D	1104	1107	anti-parallel

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There are 2 strands in C sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	1146	1148	first strand
Strand 2	D	1155	1157	anti-parallel

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There are 2 strands in DD sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	1172	1175	first strand
Strand 2	D	1180	1183	anti-parallel

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There are 4 strands in DE sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	1328	1334	first strand
Strand 2	D	1238	1244	anti-parallel
Strand 3	D	1223	1225	anti-parallel
Strand 4	D	1487	1489	parallel

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There are 4 strands in DF sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	1246	1253	first strand
Strand 2	D	1256	1263	anti-parallel
Strand 3	D	1304	1308	anti-parallel
Strand 4	D	1289	1294	anti-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	D	1336	1339	first strand
Strand 2	D	1342	1345	anti-parallel

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Please mail questions/suggestions concerning this page to Vladimir.Sobolev@weizmann. ac.il

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

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