Analysis of interatomic Contacts of Structural Units in PDB entry:
2I9L

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 2I9L entry

There are 12 chains in PDB entry 2I9L (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	ASP 1	CYS 219
B	GLN 1	ARG 219
C	ASP 1	CYS 219
D	GLN 1	ARG 219
E	ASP 1	CYS 219
F	GLN 1	ARG 219
G	ASP 1	CYS 219
H	GLN 1	ARG 219
I	ALA 4	PRO 176
J	ALA 4	PRO 176
K	ALA 4	PRO 176
L	ALA 4	PRO 176

There are 60 helices in PDB entry 2I9L. 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	89	Right-handed 310
Helix 2	2	A	126	133	Right-handed alpha
Helix 3	3	A	188	193	Right-handed alpha
Helix 4	4	B	28	32	Right-handed 310
Helix 5	5	B	62	65	Right-handed 310
Helix 6	6	B	87	91	Right-handed 310
Helix 7	7	B	190	194	Right-handed 310
Helix 8	8	B	206	209	Right-handed 310
Helix 9	9	C	85	89	Right-handed 310
Helix 10	10	C	126	133	Right-handed alpha
Helix 11	11	C	188	193	Right-handed alpha
Helix 12	12	D	28	32	Right-handed 310
Helix 13	13	D	62	65	Right-handed 310
Helix 14	14	D	87	91	Right-handed 310
Helix 15	15	D	190	194	Right-handed 310
Helix 16	16	D	206	209	Right-handed 310
Helix 17	17	E	85	89	Right-handed 310
Helix 18	18	E	126	133	Right-handed alpha
Helix 19	19	E	188	193	Right-handed alpha
Helix 20	20	F	28	32	Right-handed 310
Helix 21	21	F	62	65	Right-handed 310
Helix 22	22	F	87	91	Right-handed 310
Helix 23	23	F	190	194	Right-handed 310
Helix 24	24	F	206	209	Right-handed 310
Helix 25	25	G	85	89	Right-handed 310
Helix 26	26	G	126	133	Right-handed alpha
Helix 27	27	G	188	193	Right-handed alpha
Helix 28	28	H	28	32	Right-handed 310
Helix 29	29	H	62	65	Right-handed 310
Helix 30	30	H	87	91	Right-handed 310
Helix 31	31	H	190	194	Right-handed 310
Helix 32	32	H	206	209	Right-handed 310
Helix 33	33	I	5	27	Right-handed alpha
Helix 34	34	I	60	79	Right-handed alpha
Helix 35	35	I	80	85	Right-handed alpha
Helix 36	36	I	86	95	Right-handed alpha
Helix 37	37	I	102	118	Right-handed alpha
Helix 38	38	I	118	123	Right-handed alpha
Helix 39	39	I	153	169	Right-handed alpha
Helix 40	40	J	5	27	Right-handed alpha
Helix 41	41	J	60	79	Right-handed alpha
Helix 42	42	J	80	85	Right-handed alpha
Helix 43	43	J	86	96	Right-handed alpha
Helix 44	44	J	102	118	Right-handed alpha
Helix 45	45	J	118	123	Right-handed alpha
Helix 46	46	J	153	169	Right-handed alpha
Helix 47	47	K	5	27	Right-handed alpha
Helix 48	48	K	60	79	Right-handed alpha
Helix 49	49	K	80	85	Right-handed alpha
Helix 50	50	K	86	95	Right-handed alpha
Helix 51	51	K	102	118	Right-handed alpha
Helix 52	52	K	118	123	Right-handed alpha
Helix 53	53	K	153	169	Right-handed alpha
Helix 54	54	L	5	27	Right-handed alpha
Helix 55	55	L	60	79	Right-handed alpha
Helix 56	56	L	80	85	Right-handed alpha
Helix 57	57	L	86	96	Right-handed alpha
Helix 58	58	L	102	118	Right-handed alpha
Helix 59	59	L	118	123	Right-handed alpha
Helix 60	60	L	153	169	Right-handed alpha

There are 52 sheets in PDB entry 2I9L. 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, AY, AZ,

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	7	first strand
Strand 2	A	19	25	anti-parallel
Strand 3	A	76	81	anti-parallel
Strand 4	A	68	73	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	10	14	first strand
Strand 2	A	107	112	parallel
Strand 3	A	90	96	anti-parallel
Strand 4	A	39	44	anti-parallel
Strand 5	A	51	55	anti-parallel
Strand 6	A	59	60	anti-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	10	14	first strand
Strand 2	A	107	112	parallel
Strand 3	A	90	96	anti-parallel
Strand 4	A	102	103	anti-parallel

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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	A	30	31	first strand
Strand 2	A	36	37	anti-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	119	123	first strand
Strand 2	A	134	144	anti-parallel
Strand 3	A	178	187	anti-parallel
Strand 4	A	164	168	anti-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	A	158	160	first strand
Strand 2	A	150	155	anti-parallel
Strand 3	A	196	202	anti-parallel
Strand 4	A	210	215	anti-parallel

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There are 4 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	6	first strand
Strand 2	B	18	25	anti-parallel
Strand 3	B	78	83	anti-parallel
Strand 4	B	68	73	anti-parallel

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There are 6 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	10	12	first strand
Strand 2	B	113	117	parallel
Strand 3	B	92	99	anti-parallel
Strand 4	B	34	39	anti-parallel
Strand 5	B	46	51	anti-parallel
Strand 6	B	58	60	anti-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	10	12	first strand
Strand 2	B	113	117	parallel
Strand 3	B	92	99	anti-parallel
Strand 4	B	106	109	anti-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	126	130	first strand
Strand 2	B	142	151	anti-parallel
Strand 3	B	180	189	anti-parallel
Strand 4	B	169	177	anti-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	157	160	first strand
Strand 2	B	200	205	anti-parallel
Strand 3	B	210	215	anti-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	4	7	first strand
Strand 2	C	19	25	anti-parallel
Strand 3	C	76	81	anti-parallel
Strand 4	C	68	73	anti-parallel

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There are 6 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	10	14	first strand
Strand 2	C	107	112	parallel
Strand 3	C	90	96	anti-parallel
Strand 4	C	39	44	anti-parallel
Strand 5	C	51	55	anti-parallel
Strand 6	C	59	60	anti-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	10	14	first strand
Strand 2	C	107	112	parallel
Strand 3	C	90	96	anti-parallel
Strand 4	C	102	103	anti-parallel

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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	C	30	31	first strand
Strand 2	C	36	37	anti-parallel

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There are 4 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	119	123	first strand
Strand 2	C	134	144	anti-parallel
Strand 3	C	178	187	anti-parallel
Strand 4	C	164	168	anti-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	158	160	first strand
Strand 2	C	150	155	anti-parallel
Strand 3	C	196	202	anti-parallel
Strand 4	C	210	215	anti-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	6	first strand
Strand 2	D	18	25	anti-parallel
Strand 3	D	78	83	anti-parallel
Strand 4	D	68	73	anti-parallel

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There are 6 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	12	first strand
Strand 2	D	113	117	parallel
Strand 3	D	92	99	anti-parallel
Strand 4	D	34	39	anti-parallel
Strand 5	D	46	51	anti-parallel
Strand 6	D	58	60	anti-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	10	12	first strand
Strand 2	D	113	117	parallel
Strand 3	D	92	99	anti-parallel
Strand 4	D	106	109	anti-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	D	126	130	first strand
Strand 2	D	142	151	anti-parallel
Strand 3	D	180	189	anti-parallel
Strand 4	D	169	177	anti-parallel

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There are 3 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	157	160	first strand
Strand 2	D	200	205	anti-parallel
Strand 3	D	210	215	anti-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	4	7	first strand
Strand 2	E	19	25	anti-parallel
Strand 3	E	76	81	anti-parallel
Strand 4	E	68	73	anti-parallel

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There are 6 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	10	14	first strand
Strand 2	E	107	112	parallel
Strand 3	E	90	96	anti-parallel
Strand 4	E	39	44	anti-parallel
Strand 5	E	51	55	anti-parallel
Strand 6	E	59	60	anti-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	10	14	first strand
Strand 2	E	107	112	parallel
Strand 3	E	90	96	anti-parallel
Strand 4	E	102	103	anti-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	30	31	first strand
Strand 2	E	36	37	anti-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	E	119	123	first strand
Strand 2	E	134	144	anti-parallel
Strand 3	E	178	187	anti-parallel
Strand 4	E	164	168	anti-parallel

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There are 4 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	158	160	first strand
Strand 2	E	150	155	anti-parallel
Strand 3	E	196	202	anti-parallel
Strand 4	E	210	215	anti-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	3	6	first strand
Strand 2	F	18	25	anti-parallel
Strand 3	F	78	83	anti-parallel
Strand 4	F	68	73	anti-parallel

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There are 6 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	10	12	first strand
Strand 2	F	113	117	parallel
Strand 3	F	92	99	anti-parallel
Strand 4	F	34	39	anti-parallel
Strand 5	F	46	51	anti-parallel
Strand 6	F	58	60	anti-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	F	10	12	first strand
Strand 2	F	113	117	parallel
Strand 3	F	92	99	anti-parallel
Strand 4	F	106	109	anti-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	F	126	130	first strand
Strand 2	F	142	151	anti-parallel
Strand 3	F	180	189	anti-parallel
Strand 4	F	169	177	anti-parallel

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There are 3 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	157	160	first strand
Strand 2	F	200	205	anti-parallel
Strand 3	F	210	215	anti-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	4	7	first strand
Strand 2	G	19	25	anti-parallel
Strand 3	G	76	81	anti-parallel
Strand 4	G	68	73	anti-parallel

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There are 6 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	10	14	first strand
Strand 2	G	107	112	parallel
Strand 3	G	90	96	anti-parallel
Strand 4	G	39	44	anti-parallel
Strand 5	G	51	55	anti-parallel
Strand 6	G	59	60	anti-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	G	10	14	first strand
Strand 2	G	107	112	parallel
Strand 3	G	90	96	anti-parallel
Strand 4	G	102	103	anti-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	G	30	31	first strand
Strand 2	G	36	37	anti-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	G	119	123	first strand
Strand 2	G	134	144	anti-parallel
Strand 3	G	178	187	anti-parallel
Strand 4	G	164	168	anti-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	G	158	160	first strand
Strand 2	G	150	155	anti-parallel
Strand 3	G	196	202	anti-parallel
Strand 4	G	210	215	anti-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	3	6	first strand
Strand 2	H	18	25	anti-parallel
Strand 3	H	78	83	anti-parallel
Strand 4	H	68	73	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	10	12	first strand
Strand 2	H	113	117	parallel
Strand 3	H	92	99	anti-parallel
Strand 4	H	34	39	anti-parallel
Strand 5	H	46	51	anti-parallel
Strand 6	H	58	60	anti-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	H	10	12	first strand
Strand 2	H	113	117	parallel
Strand 3	H	92	99	anti-parallel
Strand 4	H	106	109	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	126	130	first strand
Strand 2	H	142	151	anti-parallel
Strand 3	H	180	189	anti-parallel
Strand 4	H	169	177	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	157	160	first strand
Strand 2	H	200	205	anti-parallel
Strand 3	H	210	215	anti-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	I	37	47	first strand
Strand 2	I	128	137	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	49	55	first strand
Strand 2	I	144	150	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	J	37	47	first strand
Strand 2	J	128	137	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	J	49	55	first strand
Strand 2	J	144	150	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	37	47	first strand
Strand 2	K	128	137	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	K	49	55	first strand
Strand 2	K	144	150	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	37	47	first strand
Strand 2	L	128	137	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	49	55	first strand
Strand 2	L	144	150	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: 2I9L

Analysis of interatomic Contacts of Structural Units in PDB entry:
2I9L