Analysis of interatomic Contacts of Structural Units in PDB entry:
23IL

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 23IL entry

There are 21 chains in PDB entry 23IL (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	GLY 44	ARG 134
B	VAL 21	GLY 101
C	THR 16	ASN 110
D	SER 33	SER 120
E	GLY 44	ARG 134
F	ASN 25	GLY 101
G	LYS 15	PRO 109
H	LYS 31	SER 120
K	THR 269	GLY 1148
L	LYS 7	ALA 725
M	GLY 18	LYS 468
N	HIS 108	PRO 665
O	ILE 118	GLY 638
P	SER 47	LYS 533
Q	PHE 282	LYS 471
R	GLU 738	VAL 1232
S	VAL 65	SER 452
T	TYR 337	PRO 402
U	GLU 22	ALA 131
I	G 4	A 137
J	T 11	C 144

There are189 helices in PDB entry 23IL. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	AA1	A	44	57	Right-handed alpha
Helix 2	AA2	A	63	79	Right-handed alpha
Helix 3	AA3	A	85	114	Right-handed alpha
Helix 4	AA4	A	120	131	Right-handed alpha
Helix 5	AA5	B	24	29	Right-handed 310
Helix 6	AA6	B	30	41	Right-handed alpha
Helix 7	AA7	B	49	76	Right-handed alpha
Helix 8	AA8	B	82	93	Right-handed alpha
Helix 9	AA9	C	18	22	Right-handed 310
Helix 10	AB1	C	26	37	Right-handed alpha
Helix 11	AB2	C	45	73	Right-handed alpha
Helix 12	AB3	C	79	90	Right-handed alpha
Helix 13	AB4	C	90	97	Right-handed alpha
Helix 14	AB5	D	35	46	Right-handed alpha
Helix 15	AB6	D	52	81	Right-handed alpha
Helix 16	AB7	D	87	99	Right-handed alpha
Helix 17	AB8	D	101	120	Right-handed alpha
Helix 18	AB9	E	45	56	Right-handed alpha
Helix 19	AC1	E	63	79	Right-handed alpha
Helix 20	AC2	E	85	114	Right-handed alpha
Helix 21	AC3	E	120	132	Right-handed alpha
Helix 22	AC4	F	25	29	Right-handed 310
Helix 23	AC5	F	30	42	Right-handed alpha
Helix 24	AC6	F	49	76	Right-handed alpha
Helix 25	AC7	F	82	94	Right-handed alpha
Helix 26	AC8	G	16	21	Right-handed alpha
Helix 27	AC9	G	26	37	Right-handed alpha
Helix 28	AD1	G	45	73	Right-handed alpha
Helix 29	AD2	G	79	90	Right-handed alpha
Helix 30	AD3	G	90	97	Right-handed alpha
Helix 31	AD4	H	35	46	Right-handed alpha
Helix 32	AD5	H	52	81	Right-handed alpha
Helix 33	AD6	H	87	99	Right-handed alpha
Helix 34	AD7	H	101	120	Right-handed alpha
Helix 35	AD8	K	287	292	Right-handed alpha
Helix 36	AD9	K	300	304	Right-handed 310
Helix 37	AE1	K	309	335	Right-handed alpha
Helix 38	AE2	K	354	366	Right-handed alpha
Helix 39	AE3	K	370	388	Right-handed alpha
Helix 40	AE4	K	389	394	Right-handed 310
Helix 41	AE5	K	405	488	Right-handed alpha
Helix 42	AE6	K	506	538	Right-handed alpha
Helix 43	AE7	K	562	568	Right-handed alpha
Helix 44	AE8	K	587	603	Right-handed alpha
Helix 45	AE9	K	616	631	Right-handed alpha
Helix 46	AF1	K	643	658	Right-handed alpha
Helix 47	AF2	K	669	683	Right-handed alpha
Helix 48	AF3	K	691	698	Right-handed alpha
Helix 49	AF4	K	698	703	Right-handed alpha
Helix 50	AF5	K	715	719	Right-handed 310
Helix 51	AF6	K	723	733	Right-handed alpha
Helix 52	AF7	K	750	761	Right-handed alpha
Helix 53	AF8	K	768	776	Right-handed alpha
Helix 54	AF9	K	791	807	Right-handed alpha
Helix 55	AG1	K	814	819	Right-handed alpha
Helix 56	AG2	K	835	849	Right-handed alpha
Helix 57	AG3	K	869	879	Right-handed alpha
Helix 58	AG4	K	880	882	Right-handed 310
Helix 59	AG5	K	883	891	Right-handed alpha
Helix 60	AG6	K	897	901	Right-handed 310
Helix 61	AG7	K	904	921	Right-handed alpha
Helix 62	AG8	K	930	945	Right-handed alpha
Helix 63	AG9	K	956	969	Right-handed alpha
Helix 64	AH1	K	981	985	Right-handed alpha
Helix 65	AH2	K	1004	1016	Right-handed alpha
Helix 66	AH3	K	1035	1053	Right-handed alpha
Helix 67	AH4	K	1054	1058	Right-handed 310
Helix 68	AH5	K	1064	1071	Right-handed alpha
Helix 69	AH6	K	1091	1100	Right-handed alpha
Helix 70	AH7	K	1102	1118	Right-handed alpha
Helix 71	AH8	K	1136	1140	Right-handed 310
Helix 72	AH9	K	1141	1146	Right-handed alpha
Helix 73	AI1	L	99	115	Right-handed alpha
Helix 74	AI2	L	132	146	Right-handed alpha
Helix 75	AI3	L	157	166	Right-handed alpha
Helix 76	AI4	L	212	225	Right-handed alpha
Helix 77	AI5	L	226	228	Right-handed 310
Helix 78	AI6	L	230	240	Right-handed alpha
Helix 79	AI7	L	494	499	Right-handed alpha
Helix 80	AI8	L	501	519	Right-handed alpha
Helix 81	AI9	L	524	530	Right-handed alpha
Helix 82	AJ1	L	536	540	Right-handed 310
Helix 83	AJ2	L	543	557	Right-handed alpha
Helix 84	AJ3	L	663	670	Right-handed alpha
Helix 85	AJ4	L	673	688	Right-handed alpha
Helix 86	AJ5	L	693	703	Right-handed alpha
Helix 87	AJ6	L	707	714	Right-handed alpha
Helix 88	AJ7	L	717	722	Right-handed alpha
Helix 89	AJ8	M	60	66	Right-handed 310
Helix 90	AJ9	M	86	97	Right-handed alpha
Helix 91	AK1	M	139	144	Right-handed 310
Helix 92	AK2	M	155	168	Right-handed alpha
Helix 93	AK3	M	180	189	Right-handed alpha
Helix 94	AK4	M	224	239	Right-handed alpha
Helix 95	AK5	M	247	251	Right-handed 310
Helix 96	AK6	M	275	294	Right-handed alpha
Helix 97	AK7	M	308	316	Right-handed alpha
Helix 98	AK8	M	333	340	Right-handed alpha
Helix 99	AK9	M	341	343	Right-handed 310
Helix 100	AL1	M	360	363	Right-handed 310
Helix 101	AL2	M	364	375	Right-handed alpha
Helix 102	AL3	M	380	386	Right-handed alpha
Helix 103	AL4	M	392	397	Right-handed 310
Helix 104	AL5	M	400	412	Right-handed alpha
Helix 105	AL6	M	424	430	Right-handed alpha
Helix 106	AL7	M	430	442	Right-handed alpha
Helix 107	AL8	M	443	449	Right-handed 310
Helix 108	AL9	M	451	459	Right-handed alpha
Helix 109	AM1	M	461	466	Right-handed alpha
Helix 110	AM2	N	121	123	Right-handed 310
Helix 111	AM3	N	131	138	Right-handed alpha
Helix 112	AM4	N	150	168	Right-handed alpha
Helix 113	AM5	N	174	182	Right-handed alpha
Helix 114	AM6	N	185	199	Right-handed alpha
Helix 115	AM7	N	385	399	Right-handed alpha
Helix 116	AM8	N	402	411	Right-handed alpha
Helix 117	AM9	N	416	423	Right-handed alpha
Helix 118	AN1	N	460	472	Right-handed alpha
Helix 119	AN2	N	474	480	Right-handed alpha
Helix 120	AN3	N	488	496	Right-handed alpha
Helix 121	AN4	N	547	631	Right-handed alpha
Helix 122	AN5	N	641	654	Right-handed alpha
Helix 123	AN6	O	134	139	Right-handed alpha
Helix 124	AN7	O	140	143	Right-handed 310
Helix 125	AN8	O	147	150	Right-handed 310
Helix 126	AN9	O	151	168	Right-handed alpha
Helix 127	AO1	O	175	181	Right-handed alpha
Helix 128	AO2	O	186	201	Right-handed alpha
Helix 129	AO3	O	385	400	Right-handed alpha
Helix 130	AO4	O	403	411	Right-handed alpha
Helix 131	AO5	O	414	424	Right-handed alpha
Helix 132	AO6	O	427	432	Right-handed alpha
Helix 133	AO7	O	462	472	Right-handed alpha
Helix 134	AO8	O	474	498	Right-handed alpha
Helix 135	AO9	O	563	635	Right-handed alpha
Helix 136	AP1	P	48	70	Right-handed alpha
Helix 137	AP2	P	80	85	Right-handed alpha
Helix 138	AP3	P	90	120	Right-handed alpha
Helix 139	AP4	P	303	308	Right-handed alpha
Helix 140	AP5	P	313	329	Right-handed alpha
Helix 141	AP6	P	355	362	Right-handed alpha
Helix 142	AP7	P	402	407	Right-handed alpha
Helix 143	AP8	P	415	418	Right-handed 310
Helix 144	AP9	P	419	459	Right-handed alpha
Helix 145	AQ1	P	459	479	Right-handed alpha
Helix 146	AQ2	P	517	528	Right-handed alpha
Helix 147	AQ3	Q	298	318	Right-handed alpha
Helix 148	AQ4	Q	339	343	Right-handed 310
Helix 149	AQ5	Q	353	358	Right-handed alpha
Helix 150	AQ6	Q	373	419	Right-handed alpha
Helix 151	AQ7	Q	453	464	Right-handed alpha
Helix 152	AQ8	R	753	761	Right-handed alpha
Helix 153	AQ9	R	762	767	Right-handed 310
Helix 154	AR1	R	782	791	Right-handed alpha
Helix 155	AR2	R	793	808	Right-handed alpha
Helix 156	AR3	R	831	852	Right-handed alpha
Helix 157	AR4	R	864	877	Right-handed alpha
Helix 158	AR5	R	887	910	Right-handed alpha
Helix 159	AR6	R	911	916	Right-handed 310
Helix 160	AR7	R	917	920	Right-handed 310
Helix 161	AR8	R	921	938	Right-handed alpha
Helix 162	AR9	R	944	963	Right-handed alpha
Helix 163	AS1	R	964	966	Right-handed 310
Helix 164	AS2	R	970	982	Right-handed alpha
Helix 165	AS3	R	983	985	Right-handed 310
Helix 166	AS4	R	1009	1023	Right-handed alpha
Helix 167	AS5	R	1027	1036	Right-handed alpha
Helix 168	AS6	R	1047	1059	Right-handed alpha
Helix 169	AS7	R	1074	1079	Right-handed alpha
Helix 170	AS8	R	1079	1096	Right-handed alpha
Helix 171	AS9	R	1103	1110	Right-handed alpha
Helix 172	AT1	R	1114	1133	Right-handed alpha
Helix 173	AT2	R	1156	1175	Right-handed alpha
Helix 174	AT3	R	1176	1178	Right-handed 310
Helix 175	AT4	R	1195	1201	Right-handed alpha
Helix 176	AT5	R	1214	1232	Right-handed alpha
Helix 177	AT6	S	69	90	Right-handed alpha
Helix 178	AT7	S	91	115	Right-handed alpha
Helix 179	AT8	S	166	173	Right-handed alpha
Helix 180	AT9	S	208	220	Right-handed alpha
Helix 181	AU1	S	228	245	Right-handed alpha
Helix 182	AU2	S	262	267	Right-handed alpha
Helix 183	AU3	S	300	312	Right-handed alpha
Helix 184	AU4	S	315	340	Right-handed alpha
Helix 185	AU5	S	353	358	Right-handed alpha
Helix 186	AU6	S	369	373	Right-handed 310
Helix 187	AU7	S	384	404	Right-handed alpha
Helix 188	AU8	T	364	396	Right-handed alpha
Helix 189	AU9	U	75	84	Right-handed alpha

There are 29 sheets in PDB entry 23IL. Click on sheet of interest to get list of strands forming it: AA1, AA2, AA3, AA4, AA5, AA6, AA7, AA8, AA9, AB1, AB2, AB3, AB4, AB5, AB6, AB7, AB8, AB9, AC1, AC2, AC3, AC4, AC5, AC6, AC7, AC8, AC9, AD1, AD2,

There are 2 strands in AA1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	83	84	first strand
Strand 2	B	80	81	parallel

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There are 2 strands in AA2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	118	119	first strand
Strand 2	B	45	46	parallel

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There are 2 strands in AA3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	96	98	first strand
Strand 2	G	100	102	parallel

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There are 2 strands in AA4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	42	43	first strand
Strand 2	D	85	86	parallel

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There are 2 strands in AA5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	77	78	first strand
Strand 2	D	50	51	parallel

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There are 2 strands in AA6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	100	101	first strand
Strand 2	F	96	97	parallel

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There are 2 strands in AA7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	83	84	first strand
Strand 2	F	80	81	parallel

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There are 2 strands in AA8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	42	43	first strand
Strand 2	H	85	86	parallel

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There are 2 strands in AA9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	77	78	first strand
Strand 2	H	50	51	parallel

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There are 7 strands in AB1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	663	665	first strand
Strand 2	K	687	690	parallel
Strand 3	K	638	641	parallel
Strand 4	K	709	713	parallel
Strand 5	K	739	741	parallel
Strand 6	K	607	609	parallel
Strand 7	K	810	811	parallel

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There are 6 strands in AB2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	825	832	first strand
Strand 2	K	1024	1031	parallel
Strand 3	K	995	998	parallel
Strand 4	K	924	928	parallel
Strand 5	K	976	980	parallel
Strand 6	K	948	951	parallel

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There are 6 strands in AB3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	37	40	first strand
Strand 2	L	22	27	anti-parallel
Strand 3	L	14	18	anti-parallel
Strand 4	L	123	127	parallel
Strand 5	L	151	156	parallel
Strand 6	L	704	706	anti-parallel

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There are 2 strands in AB4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	44	45	first strand
Strand 2	L	53	54	anti-parallel

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There are 2 strands in AB5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	57	61	first strand
Strand 2	L	77	81	anti-parallel

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There are 2 strands in AB6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	92	93	first strand
Strand 2	L	96	97	anti-parallel

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There are 3 strands in AB7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	189	190	first strand
Strand 2	L	180	186	anti-parallel
Strand 3	L	194	196	anti-parallel

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There are 4 strands in AB8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	189	190	first strand
Strand 2	L	180	186	anti-parallel
Strand 3	L	169	175	anti-parallel
Strand 4	L	532	535	parallel

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There are 2 strands in AB9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	351	363	first strand
Strand 2	L	480	492	anti-parallel

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There are 5 strands in AC1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	M	45	48	first strand
Strand 2	M	32	37	anti-parallel
Strand 3	M	24	26	anti-parallel
Strand 4	M	146	150	parallel
Strand 5	M	175	179	parallel

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There are 2 strands in AC2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	M	50	53	first strand
Strand 2	M	72	75	anti-parallel

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There are 5 strands in AC3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	M	212	221	first strand
Strand 2	M	203	209	anti-parallel
Strand 3	M	193	198	anti-parallel
Strand 4	M	388	391	parallel
Strand 5	M	419	420	parallel

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There are 2 strands in AC4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	M	319	322	first strand
Strand 2	M	328	331	anti-parallel

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There are 2 strands in AC5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	N	116	119	first strand
Strand 2	O	226	229	parallel

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There are 2 strands in AC6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	R	779	781	first strand
Strand 2	S	145	147	parallel

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There are 2 strands in AC7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	R	812	816	first strand
Strand 2	R	819	822	anti-parallel

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There are 2 strands in AC8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	S	180	189	first strand
Strand 2	S	192	201	anti-parallel

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There are 2 strands in AC9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	S	272	273	first strand
Strand 2	S	292	293	anti-parallel

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There are 4 strands in AD1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	S	379	382	first strand
Strand 2	S	284	289	anti-parallel
Strand 3	S	276	281	anti-parallel
Strand 4	S	423	424	parallel

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There are 2 strands in AD2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	U	34	40	first strand
Strand 2	U	120	126	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: 23IL

Analysis of interatomic Contacts of Structural Units in PDB entry:
23IL