Analysis of interatomic Contacts of Structural Units in PDB entry:
1S20

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 1S20 entry

There are 8 chains in PDB entry 1S20 (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	MSE 1	GLU 334
B	MSE 1	GLU 334
C	MSE 1	GLU 334
D	MSE 1	GLU 334
E	MSE 1	GLU 334
F	MSE 1	LEU 333
G	MSE 1	HIS 335
H	MSE 1	GLU 334

There are100 helices in PDB entry 1S20. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	4	19	Right-handed alpha
Helix 2	2	A	22	39	Right-handed alpha
Helix 3	3	A	45	47	Right-handed 310
Helix 4	4	A	48	58	Right-handed alpha
Helix 5	5	A	85	105	Right-handed alpha
Helix 6	6	A	119	130	Right-handed alpha
Helix 7	7	A	179	189	Right-handed alpha
Helix 8	8	A	208	216	Right-handed alpha
Helix 9	9	A	223	242	Right-handed alpha
Helix 10	10	A	245	253	Right-handed alpha
Helix 11	11	A	273	290	Right-handed alpha
Helix 12	12	A	306	318	Right-handed alpha
Helix 13	13	A	322	332	Right-handed alpha
Helix 14	14	B	4	18	Right-handed alpha
Helix 15	15	B	22	39	Right-handed alpha
Helix 16	16	B	45	47	Right-handed 310
Helix 17	17	B	48	58	Right-handed alpha
Helix 18	18	B	85	105	Right-handed alpha
Helix 19	19	B	120	129	Right-handed alpha
Helix 20	20	B	179	190	Right-handed alpha
Helix 21	21	B	208	216	Right-handed alpha
Helix 22	22	B	223	242	Right-handed alpha
Helix 23	23	B	245	253	Right-handed alpha
Helix 24	24	B	273	290	Right-handed alpha
Helix 25	25	B	305	318	Right-handed alpha
Helix 26	26	B	322	332	Right-handed alpha
Helix 27	27	C	4	18	Right-handed alpha
Helix 28	28	C	22	39	Right-handed alpha
Helix 29	29	C	45	47	Right-handed 310
Helix 30	30	C	48	58	Right-handed alpha
Helix 31	31	C	85	105	Right-handed alpha
Helix 32	32	C	120	130	Right-handed alpha
Helix 33	33	C	179	190	Right-handed alpha
Helix 34	34	C	208	216	Right-handed alpha
Helix 35	35	C	223	242	Right-handed alpha
Helix 36	36	C	245	253	Right-handed alpha
Helix 37	37	C	273	290	Right-handed alpha
Helix 38	38	C	305	318	Right-handed alpha
Helix 39	39	C	322	334	Right-handed alpha
Helix 40	40	D	4	18	Right-handed alpha
Helix 41	41	D	22	39	Right-handed alpha
Helix 42	42	D	48	58	Right-handed alpha
Helix 43	43	D	85	105	Right-handed alpha
Helix 44	44	D	119	130	Right-handed alpha
Helix 45	45	D	179	189	Right-handed alpha
Helix 46	46	D	208	216	Right-handed alpha
Helix 47	47	D	223	242	Right-handed alpha
Helix 48	48	D	245	253	Right-handed alpha
Helix 49	49	D	273	290	Right-handed alpha
Helix 50	50	D	304	315	Right-handed alpha
Helix 51	51	D	322	332	Right-handed alpha
Helix 52	52	E	4	18	Right-handed alpha
Helix 53	53	E	22	39	Right-handed alpha
Helix 54	54	E	45	47	Right-handed 310
Helix 55	55	E	48	58	Right-handed alpha
Helix 56	56	E	85	105	Right-handed alpha
Helix 57	57	E	119	129	Right-handed alpha
Helix 58	58	E	179	190	Right-handed alpha
Helix 59	59	E	208	216	Right-handed alpha
Helix 60	60	E	223	242	Right-handed alpha
Helix 61	61	E	245	253	Right-handed alpha
Helix 62	62	E	273	290	Right-handed alpha
Helix 63	63	E	305	318	Right-handed alpha
Helix 64	64	E	322	333	Right-handed alpha
Helix 65	65	F	4	18	Right-handed alpha
Helix 66	66	F	22	39	Right-handed alpha
Helix 67	67	F	48	58	Right-handed alpha
Helix 68	68	F	85	105	Right-handed alpha
Helix 69	69	F	120	129	Right-handed alpha
Helix 70	70	F	179	189	Right-handed alpha
Helix 71	71	F	208	216	Right-handed alpha
Helix 72	72	F	223	242	Right-handed alpha
Helix 73	73	F	245	253	Right-handed alpha
Helix 74	74	F	273	290	Right-handed alpha
Helix 75	75	F	304	317	Right-handed alpha
Helix 76	76	F	322	333	Right-handed alpha
Helix 77	77	G	4	19	Right-handed alpha
Helix 78	78	G	22	39	Right-handed alpha
Helix 79	79	G	48	58	Right-handed alpha
Helix 80	80	G	85	105	Right-handed alpha
Helix 81	81	G	119	130	Right-handed alpha
Helix 82	82	G	179	190	Right-handed alpha
Helix 83	83	G	208	216	Right-handed alpha
Helix 84	84	G	223	241	Right-handed alpha
Helix 85	85	G	245	253	Right-handed alpha
Helix 86	86	G	273	290	Right-handed alpha
Helix 87	87	G	305	315	Right-handed alpha
Helix 88	88	G	322	334	Right-handed alpha
Helix 89	89	H	4	18	Right-handed alpha
Helix 90	90	H	22	39	Right-handed alpha
Helix 91	91	H	48	58	Right-handed alpha
Helix 92	92	H	85	105	Right-handed alpha
Helix 93	93	H	119	129	Right-handed alpha
Helix 94	94	H	179	190	Right-handed alpha
Helix 95	95	H	208	216	Right-handed alpha
Helix 96	96	H	223	242	Right-handed alpha
Helix 97	97	H	245	253	Right-handed alpha
Helix 98	98	H	273	290	Right-handed alpha
Helix 99	99	H	306	317	Right-handed alpha
Helix 100	100	H	322	333	Right-handed alpha

There are 24 sheets in PDB entry 1S20. 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,

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	A	2	3	first strand
Strand 2	A	319	320	anti-parallel

Back to list of sheets
Back to top of page

There are 7 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	68	72	first strand
Strand 2	A	76	80	anti-parallel
Strand 3	A	106	114	parallel
Strand 4	A	259	267	anti-parallel
Strand 5	A	132	138	anti-parallel
Strand 6	A	159	163	anti-parallel
Strand 7	A	169	173	anti-parallel

Back to list of sheets
Back to top of page

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	A	198	199	first strand
Strand 2	A	205	206	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	2	3	first strand
Strand 2	B	319	320	anti-parallel

Back to list of sheets
Back to top of page

There are 7 strands in E sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	68	72	first strand
Strand 2	B	76	80	anti-parallel
Strand 3	B	106	114	parallel
Strand 4	B	259	266	anti-parallel
Strand 5	B	133	138	anti-parallel
Strand 6	B	159	163	anti-parallel
Strand 7	B	169	173	anti-parallel

Back to list of sheets
Back to top of page

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	B	198	199	first strand
Strand 2	B	205	206	anti-parallel

Back to list of sheets
Back to top of page

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	C	2	3	first strand
Strand 2	C	319	320	anti-parallel

Back to list of sheets
Back to top of page

There are 7 strands in H sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	68	72	first strand
Strand 2	C	76	80	anti-parallel
Strand 3	C	106	114	parallel
Strand 4	C	259	267	anti-parallel
Strand 5	C	132	138	anti-parallel
Strand 6	C	159	163	anti-parallel
Strand 7	C	169	173	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	198	199	first strand
Strand 2	C	205	206	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	2	3	first strand
Strand 2	D	319	320	anti-parallel

Back to list of sheets
Back to top of page

There are 7 strands in K sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	68	72	first strand
Strand 2	D	76	80	anti-parallel
Strand 3	D	106	114	parallel
Strand 4	D	259	267	anti-parallel
Strand 5	D	132	138	anti-parallel
Strand 6	D	159	163	anti-parallel
Strand 7	D	169	173	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	198	199	first strand
Strand 2	D	205	206	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	2	3	first strand
Strand 2	E	319	320	anti-parallel

Back to list of sheets
Back to top of page

There are 7 strands in N sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	68	72	first strand
Strand 2	E	76	80	anti-parallel
Strand 3	E	106	114	parallel
Strand 4	E	259	266	anti-parallel
Strand 5	E	133	138	anti-parallel
Strand 6	E	159	163	anti-parallel
Strand 7	E	169	173	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	198	199	first strand
Strand 2	E	205	206	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	2	3	first strand
Strand 2	F	319	320	anti-parallel

Back to list of sheets
Back to top of page

There are 7 strands in Q sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	68	72	first strand
Strand 2	F	76	80	anti-parallel
Strand 3	F	106	114	parallel
Strand 4	F	259	266	anti-parallel
Strand 5	F	133	138	anti-parallel
Strand 6	F	159	163	anti-parallel
Strand 7	F	169	173	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	198	199	first strand
Strand 2	F	205	206	anti-parallel

Back to list of sheets
Back to top of page

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	G	2	3	first strand
Strand 2	G	319	320	anti-parallel

Back to list of sheets
Back to top of page

There are 7 strands in T sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	68	72	first strand
Strand 2	G	76	80	anti-parallel
Strand 3	G	106	115	parallel
Strand 4	G	257	266	anti-parallel
Strand 5	G	133	138	anti-parallel
Strand 6	G	159	163	anti-parallel
Strand 7	G	169	173	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	198	199	first strand
Strand 2	G	205	206	anti-parallel

Back to list of sheets
Back to top of page

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	H	2	3	first strand
Strand 2	H	319	320	anti-parallel

Back to list of sheets
Back to top of page

There are 7 strands in W sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	68	72	first strand
Strand 2	H	76	80	anti-parallel
Strand 3	H	106	114	parallel
Strand 4	H	259	267	anti-parallel
Strand 5	H	132	138	anti-parallel
Strand 6	H	159	163	anti-parallel
Strand 7	H	169	173	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	198	199	first strand
Strand 2	H	205	206	anti-parallel

Back to list of sheets
Back to top of page

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

Analysis of interatomic Contacts of Structural Units in PDB entry: 1S20

Analysis of interatomic Contacts of Structural Units in PDB entry:
1S20