Analysis of interatomic Contacts of Structural Units in PDB entry:
1Q23

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 1Q23 entry

There are 12 chains in PDB entry 1Q23 (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	ILE 5	GLY 218
B	GLU 2	GLY 218
C	THR 6	GLY 218
D	THR 6	GLY 218
E	LYS 3	GLY 217
F	THR 6	GLY 217
G	THR 6	GLY 218
H	LYS 4	ALA 219
I	LYS 3	GLY 217
J	ILE 5	GLN 216
K	LYS 3	TRP 215
L	THR 6	TRP 215

There are 79 helices in PDB entry 1Q23. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	12	16	Right-handed 310
Helix 2	2	A	18	26	Right-handed alpha
Helix 3	3	A	41	51	Right-handed alpha
Helix 4	4	A	54	68	Right-handed alpha
Helix 5	5	A	70	73	Right-handed 310
Helix 6	6	A	112	128	Right-handed alpha
Helix 7	7	A	197	215	Right-handed alpha
Helix 8	8	B	12	16	Right-handed 310
Helix 9	9	B	18	26	Right-handed alpha
Helix 10	10	B	41	51	Right-handed alpha
Helix 11	11	B	54	68	Right-handed alpha
Helix 12	12	B	69	73	Right-handed 310
Helix 13	13	B	112	128	Right-handed alpha
Helix 14	14	B	197	214	Right-handed alpha
Helix 15	15	C	12	16	Right-handed 310
Helix 16	16	C	18	26	Right-handed alpha
Helix 17	17	C	41	51	Right-handed alpha
Helix 18	18	C	54	69	Right-handed alpha
Helix 19	19	C	70	73	Right-handed 310
Helix 20	20	C	112	128	Right-handed alpha
Helix 21	21	C	197	215	Right-handed alpha
Helix 22	22	D	18	26	Right-handed alpha
Helix 23	23	D	41	52	Right-handed alpha
Helix 24	24	D	54	68	Right-handed alpha
Helix 25	25	D	70	73	Right-handed 310
Helix 26	26	D	112	128	Right-handed alpha
Helix 27	27	D	197	215	Right-handed alpha
Helix 28	28	E	18	27	Right-handed alpha
Helix 29	29	E	41	51	Right-handed alpha
Helix 30	30	E	54	68	Right-handed alpha
Helix 31	31	E	70	73	Right-handed 310
Helix 32	32	E	112	128	Right-handed alpha
Helix 33	33	E	197	215	Right-handed alpha
Helix 34	34	F	12	16	Right-handed 310
Helix 35	35	F	18	27	Right-handed alpha
Helix 36	36	F	41	51	Right-handed alpha
Helix 37	37	F	54	68	Right-handed alpha
Helix 38	38	F	69	73	Right-handed 310
Helix 39	39	F	112	128	Right-handed alpha
Helix 40	40	F	197	215	Right-handed alpha
Helix 41	41	G	12	16	Right-handed 310
Helix 42	42	G	18	26	Right-handed alpha
Helix 43	43	G	41	51	Right-handed alpha
Helix 44	44	G	54	68	Right-handed alpha
Helix 45	45	G	69	73	Right-handed 310
Helix 46	46	G	112	128	Right-handed alpha
Helix 47	47	G	197	215	Right-handed alpha
Helix 48	48	H	12	16	Right-handed 310
Helix 49	49	H	18	26	Right-handed alpha
Helix 50	50	H	41	52	Right-handed alpha
Helix 51	51	H	54	68	Right-handed alpha
Helix 52	52	H	70	73	Right-handed 310
Helix 53	53	H	112	128	Right-handed alpha
Helix 54	54	H	197	215	Right-handed alpha
Helix 55	55	I	18	26	Right-handed alpha
Helix 56	56	I	41	51	Right-handed alpha
Helix 57	57	I	54	68	Right-handed alpha
Helix 58	58	I	70	73	Right-handed 310
Helix 59	59	I	112	128	Right-handed alpha
Helix 60	60	I	197	215	Right-handed alpha
Helix 61	61	J	18	26	Right-handed alpha
Helix 62	62	J	41	51	Right-handed alpha
Helix 63	63	J	54	68	Right-handed alpha
Helix 64	64	J	69	73	Right-handed 310
Helix 65	65	J	112	128	Right-handed alpha
Helix 66	66	J	197	215	Right-handed alpha
Helix 67	67	K	12	16	Right-handed 310
Helix 68	68	K	18	27	Right-handed alpha
Helix 69	69	K	41	51	Right-handed alpha
Helix 70	70	K	54	68	Right-handed alpha
Helix 71	71	K	69	73	Right-handed 310
Helix 72	72	K	112	128	Right-handed alpha
Helix 73	73	K	197	215	Right-handed alpha
Helix 74	74	L	18	26	Right-handed alpha
Helix 75	75	L	41	51	Right-handed alpha
Helix 76	76	L	54	68	Right-handed alpha
Helix 77	77	L	69	73	Right-handed 310
Helix 78	78	L	112	128	Right-handed alpha
Helix 79	79	L	197	215	Right-handed alpha

There are 36 sheets in PDB entry 1Q23. 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,

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	8	10	first strand
Strand 2	A	81	85	anti-parallel
Strand 3	A	75	78	anti-parallel

Back to list of sheets
Back to top of page

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	101	106	first strand
Strand 2	A	89	96	anti-parallel
Strand 3	A	142	147	parallel
Strand 4	A	170	173	parallel
Strand 5	A	182	192	anti-parallel
Strand 6	A	177	179	anti-parallel

Back to list of sheets
Back to top of page

There are 7 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	101	106	first strand
Strand 2	A	89	96	anti-parallel
Strand 3	A	142	147	parallel
Strand 4	A	170	173	parallel
Strand 5	A	182	192	anti-parallel
Strand 6	A	31	40	anti-parallel
Strand 7	C	155	160	anti-parallel

Back to list of sheets
Back to top of page

There are 7 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	155	160	first strand
Strand 2	B	31	40	anti-parallel
Strand 3	B	182	192	anti-parallel
Strand 4	B	170	173	anti-parallel
Strand 5	B	142	147	parallel
Strand 6	B	89	96	parallel
Strand 7	B	101	106	anti-parallel

Back to list of sheets
Back to top of page

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	155	160	first strand
Strand 2	B	31	40	anti-parallel
Strand 3	B	182	192	anti-parallel
Strand 4	B	177	179	anti-parallel

Back to list of sheets
Back to top of page

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	B	4	5	first strand
Strand 2	I	8	10	anti-parallel
Strand 3	I	81	85	anti-parallel
Strand 4	I	75	78	anti-parallel

Back to list of sheets
Back to top of page

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	75	78	first strand
Strand 2	B	81	85	anti-parallel
Strand 3	B	8	10	anti-parallel
Strand 4	I	4	5	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	B	155	160	first strand
Strand 2	C	31	40	anti-parallel
Strand 3	C	182	192	anti-parallel
Strand 4	C	170	173	anti-parallel
Strand 5	C	142	147	parallel
Strand 6	C	89	96	parallel
Strand 7	C	101	106	anti-parallel

Back to list of sheets
Back to top of page

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	155	160	first strand
Strand 2	C	31	40	anti-parallel
Strand 3	C	182	192	anti-parallel
Strand 4	C	177	179	anti-parallel

Back to list of sheets
Back to top of page

There are 3 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	8	10	first strand
Strand 2	C	81	85	anti-parallel
Strand 3	C	75	78	anti-parallel

Back to list of sheets
Back to top of page

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	D	8	10	first strand
Strand 2	D	81	85	anti-parallel
Strand 3	D	75	78	anti-parallel

Back to list of sheets
Back to top of page

There are 6 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	101	106	first strand
Strand 2	D	89	96	anti-parallel
Strand 3	D	142	147	parallel
Strand 4	D	170	173	parallel
Strand 5	D	182	192	anti-parallel
Strand 6	D	177	179	anti-parallel

Back to list of sheets
Back to top of page

There are 7 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	101	106	first strand
Strand 2	D	89	96	anti-parallel
Strand 3	D	142	147	parallel
Strand 4	D	170	173	parallel
Strand 5	D	182	192	anti-parallel
Strand 6	D	31	40	anti-parallel
Strand 7	F	155	160	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	D	155	160	first strand
Strand 2	E	31	40	anti-parallel
Strand 3	E	182	192	anti-parallel
Strand 4	E	170	173	anti-parallel
Strand 5	E	142	147	parallel
Strand 6	E	89	96	parallel
Strand 7	E	101	106	anti-parallel

Back to list of sheets
Back to top of page

There are 4 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	155	160	first strand
Strand 2	E	31	40	anti-parallel
Strand 3	E	182	192	anti-parallel
Strand 4	E	177	179	anti-parallel

Back to list of sheets
Back to top of page

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	E	8	10	first strand
Strand 2	E	81	85	anti-parallel
Strand 3	E	75	78	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	E	155	160	first strand
Strand 2	F	31	40	anti-parallel
Strand 3	F	182	192	anti-parallel
Strand 4	F	170	173	anti-parallel
Strand 5	F	142	147	parallel
Strand 6	F	89	96	parallel
Strand 7	F	101	106	anti-parallel

Back to list of sheets
Back to top of page

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	E	155	160	first strand
Strand 2	F	31	40	anti-parallel
Strand 3	F	182	192	anti-parallel
Strand 4	F	177	179	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	8	10	first strand
Strand 2	F	81	85	anti-parallel
Strand 3	F	75	78	anti-parallel

Back to list of sheets
Back to top of page

There are 3 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	8	10	first strand
Strand 2	G	81	85	anti-parallel
Strand 3	G	75	78	anti-parallel

Back to list of sheets
Back to top of page

There are 6 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	101	106	first strand
Strand 2	G	89	96	anti-parallel
Strand 3	G	142	147	parallel
Strand 4	G	170	173	parallel
Strand 5	G	182	192	anti-parallel
Strand 6	G	177	179	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	101	106	first strand
Strand 2	G	89	96	anti-parallel
Strand 3	G	142	147	parallel
Strand 4	G	170	173	parallel
Strand 5	G	182	192	anti-parallel
Strand 6	G	31	40	anti-parallel
Strand 7	I	155	160	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	G	155	160	first strand
Strand 2	H	31	40	anti-parallel
Strand 3	H	182	192	anti-parallel
Strand 4	H	170	173	anti-parallel
Strand 5	H	142	147	parallel
Strand 6	H	89	96	parallel
Strand 7	H	101	106	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	155	160	first strand
Strand 2	H	31	40	anti-parallel
Strand 3	H	182	192	anti-parallel
Strand 4	H	177	179	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	8	10	first strand
Strand 2	H	81	85	anti-parallel
Strand 3	H	75	78	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	155	160	first strand
Strand 2	I	31	40	anti-parallel
Strand 3	I	182	192	anti-parallel
Strand 4	I	170	173	anti-parallel
Strand 5	I	142	147	parallel
Strand 6	I	89	96	parallel
Strand 7	I	101	106	anti-parallel

Back to list of sheets
Back to top of page

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	H	155	160	first strand
Strand 2	I	31	40	anti-parallel
Strand 3	I	182	192	anti-parallel
Strand 4	I	177	179	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	J	8	10	first strand
Strand 2	J	81	85	anti-parallel
Strand 3	J	75	78	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	J	101	106	first strand
Strand 2	J	89	96	anti-parallel
Strand 3	J	142	147	parallel
Strand 4	J	170	173	parallel
Strand 5	J	182	192	anti-parallel
Strand 6	J	177	179	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	J	101	106	first strand
Strand 2	J	89	96	anti-parallel
Strand 3	J	142	147	parallel
Strand 4	J	170	173	parallel
Strand 5	J	182	192	anti-parallel
Strand 6	J	31	40	anti-parallel
Strand 7	L	155	160	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	J	155	160	first strand
Strand 2	K	31	40	anti-parallel
Strand 3	K	182	192	anti-parallel
Strand 4	K	170	173	anti-parallel
Strand 5	K	142	147	parallel
Strand 6	K	89	96	parallel
Strand 7	K	101	106	anti-parallel

Back to list of sheets
Back to top of page

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	J	155	160	first strand
Strand 2	K	31	40	anti-parallel
Strand 3	K	182	192	anti-parallel
Strand 4	K	177	179	anti-parallel

Back to list of sheets
Back to top of page

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	K	8	10	first strand
Strand 2	K	81	85	anti-parallel
Strand 3	K	75	78	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	155	160	first strand
Strand 2	L	31	40	anti-parallel
Strand 3	L	182	192	anti-parallel
Strand 4	L	170	173	anti-parallel
Strand 5	L	142	147	parallel
Strand 6	L	89	95	parallel
Strand 7	L	102	106	anti-parallel

Back to list of sheets
Back to top of page

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	K	155	160	first strand
Strand 2	L	31	40	anti-parallel
Strand 3	L	182	192	anti-parallel
Strand 4	L	177	179	anti-parallel

Back to list of sheets
Back to top of page

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	L	8	10	first strand
Strand 2	L	82	85	anti-parallel
Strand 3	L	75	77	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: 1Q23

Analysis of interatomic Contacts of Structural Units in PDB entry:
1Q23