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

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 1TWI entry

There are 4 chains in PDB entry 1TWI (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	MET 15	LEU 448
B	MET 15	LEU 448
C	MET 15	LEU 448
D	MET 15	LEU 448

There are 69 helices in PDB entry 1TWI. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	35	43	Right-handed alpha
Helix 2	2	A	51	73	Right-handed alpha
Helix 3	3	A	83	85	Right-handed 310
Helix 4	4	A	87	97	Right-handed alpha
Helix 5	5	A	105	115	Right-handed alpha
Helix 6	6	A	118	120	Right-handed 310
Helix 7	7	A	130	140	Right-handed alpha
Helix 8	8	A	149	164	Right-handed alpha
Helix 9	9	A	182	192	Right-handed alpha
Helix 10	10	A	201	213	Right-handed alpha
Helix 11	11	A	232	252	Right-handed alpha
Helix 12	12	A	277	291	Right-handed alpha
Helix 13	13	A	306	311	Right-handed alpha
Helix 14	14	A	342	348	Right-handed alpha
Helix 15	15	A	402	406	Right-handed 310
Helix 16	16	A	433	438	Right-handed alpha
Helix 17	17	A	444	448	Right-handed 310
Helix 18	18	B	35	43	Right-handed alpha
Helix 19	19	B	51	65	Right-handed alpha
Helix 20	20	B	66	73	Right-handed alpha
Helix 21	21	B	83	85	Right-handed 310
Helix 22	22	B	87	98	Right-handed alpha
Helix 23	23	B	105	115	Right-handed alpha
Helix 24	24	B	118	120	Right-handed 310
Helix 25	25	B	130	140	Right-handed alpha
Helix 26	26	B	149	164	Right-handed alpha
Helix 27	27	B	182	192	Right-handed alpha
Helix 28	28	B	201	213	Right-handed alpha
Helix 29	29	B	232	252	Right-handed alpha
Helix 30	30	B	277	291	Right-handed alpha
Helix 31	31	B	306	311	Right-handed alpha
Helix 32	32	B	342	348	Right-handed alpha
Helix 33	33	B	402	406	Right-handed 310
Helix 34	34	B	433	438	Right-handed alpha
Helix 35	35	B	444	448	Right-handed 310
Helix 36	36	C	35	43	Right-handed alpha
Helix 37	37	C	51	73	Right-handed alpha
Helix 38	38	C	83	85	Right-handed 310
Helix 39	39	C	87	97	Right-handed alpha
Helix 40	40	C	105	115	Right-handed alpha
Helix 41	41	C	118	120	Right-handed 310
Helix 42	42	C	130	140	Right-handed alpha
Helix 43	43	C	149	164	Right-handed alpha
Helix 44	44	C	182	192	Right-handed alpha
Helix 45	45	C	201	213	Right-handed alpha
Helix 46	46	C	232	252	Right-handed alpha
Helix 47	47	C	277	291	Right-handed alpha
Helix 48	48	C	306	311	Right-handed alpha
Helix 49	49	C	342	348	Right-handed alpha
Helix 50	50	C	402	406	Right-handed 310
Helix 51	51	C	433	438	Right-handed alpha
Helix 52	52	C	444	448	Right-handed 310
Helix 53	53	D	35	43	Right-handed alpha
Helix 54	54	D	51	73	Right-handed alpha
Helix 55	55	D	83	85	Right-handed 310
Helix 56	56	D	87	97	Right-handed alpha
Helix 57	57	D	105	115	Right-handed alpha
Helix 58	58	D	118	120	Right-handed 310
Helix 59	59	D	130	141	Right-handed alpha
Helix 60	60	D	149	164	Right-handed alpha
Helix 61	61	D	182	192	Right-handed alpha
Helix 62	62	D	201	213	Right-handed alpha
Helix 63	63	D	232	252	Right-handed alpha
Helix 64	64	D	277	291	Right-handed alpha
Helix 65	65	D	306	311	Right-handed alpha
Helix 66	66	D	342	348	Right-handed alpha
Helix 67	67	D	402	406	Right-handed 310
Helix 68	68	D	433	438	Right-handed alpha
Helix 69	69	D	444	448	Right-handed 310

There are 16 sheets in PDB entry 1TWI. 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,

There are 3 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	21	24	first strand
Strand 2	A	27	30	anti-parallel
Strand 3	A	33	34	anti-parallel

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There are 6 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	353	355	first strand
Strand 2	A	392	396	anti-parallel
Strand 3	A	314	325	anti-parallel
Strand 4	A	330	334	anti-parallel
Strand 5	A	362	368	parallel
Strand 6	A	377	385	anti-parallel

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There are 6 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	353	355	first strand
Strand 2	A	392	396	anti-parallel
Strand 3	A	314	325	anti-parallel
Strand 4	A	46	50	anti-parallel
Strand 5	A	416	421	parallel
Strand 6	A	424	429	anti-parallel

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There are 10 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	196	197	first strand
Strand 2	A	167	174	parallel
Strand 3	A	216	222	parallel
Strand 4	A	258	260	parallel
Strand 5	A	300	303	parallel
Strand 6	A	76	81	parallel
Strand 7	A	100	103	parallel
Strand 8	A	122	124	parallel
Strand 9	A	144	147	parallel
Strand 10	A	167	174	parallel

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There are 3 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	21	24	first strand
Strand 2	B	27	30	anti-parallel
Strand 3	B	33	34	anti-parallel

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There are 6 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	353	355	first strand
Strand 2	B	392	395	anti-parallel
Strand 3	B	314	325	anti-parallel
Strand 4	B	330	334	anti-parallel
Strand 5	B	362	368	parallel
Strand 6	B	377	385	anti-parallel

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There are 6 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	353	355	first strand
Strand 2	B	392	395	anti-parallel
Strand 3	B	314	325	anti-parallel
Strand 4	B	46	50	anti-parallel
Strand 5	B	416	421	parallel
Strand 6	B	424	429	anti-parallel

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There are 10 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	196	197	first strand
Strand 2	B	167	174	parallel
Strand 3	B	216	222	parallel
Strand 4	B	258	260	parallel
Strand 5	B	300	303	parallel
Strand 6	B	76	81	parallel
Strand 7	B	100	103	parallel
Strand 8	B	122	124	parallel
Strand 9	B	144	147	parallel
Strand 10	B	167	174	parallel

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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	C	21	24	first strand
Strand 2	C	27	30	anti-parallel
Strand 3	C	33	34	anti-parallel

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There are 6 strands in J sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	353	355	first strand
Strand 2	C	392	396	anti-parallel
Strand 3	C	314	325	anti-parallel
Strand 4	C	330	334	anti-parallel
Strand 5	C	362	368	parallel
Strand 6	C	377	385	anti-parallel

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There are 6 strands in K sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	353	355	first strand
Strand 2	C	392	396	anti-parallel
Strand 3	C	314	325	anti-parallel
Strand 4	C	46	50	anti-parallel
Strand 5	C	416	421	parallel
Strand 6	C	424	429	anti-parallel

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There are 10 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	196	197	first strand
Strand 2	C	167	174	parallel
Strand 3	C	216	222	parallel
Strand 4	C	258	260	parallel
Strand 5	C	300	303	parallel
Strand 6	C	76	81	parallel
Strand 7	C	100	103	parallel
Strand 8	C	122	124	parallel
Strand 9	C	144	147	parallel
Strand 10	C	167	174	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	D	21	24	first strand
Strand 2	D	27	30	anti-parallel
Strand 3	D	33	34	anti-parallel

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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	D	353	355	first strand
Strand 2	D	392	396	anti-parallel
Strand 3	D	314	325	anti-parallel
Strand 4	D	330	334	anti-parallel
Strand 5	D	362	368	parallel
Strand 6	D	377	385	anti-parallel

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There are 6 strands in O sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	353	355	first strand
Strand 2	D	392	396	anti-parallel
Strand 3	D	314	325	anti-parallel
Strand 4	D	46	50	anti-parallel
Strand 5	D	416	421	parallel
Strand 6	D	424	429	anti-parallel

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There are 10 strands in P sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	196	197	first strand
Strand 2	D	167	174	parallel
Strand 3	D	216	222	parallel
Strand 4	D	258	260	parallel
Strand 5	D	300	303	parallel
Strand 6	D	76	81	parallel
Strand 7	D	100	103	parallel
Strand 8	D	122	124	parallel
Strand 9	D	144	147	parallel
Strand 10	D	167	174	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: 1TWI

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