Analysis of interatomic Contacts of Structural Units in PDB entry:
7N9T

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 7N9T entry

There are 6 chains in PDB entry 7N9T (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	PRO 25	SER 1147
B	PRO 25	SER 1147
C	PRO 25	SER 1147
D	HIS 1	SER 119
E	HIS 1	SER 119
F	HIS 1	SER 119

There are 66 helices in PDB entry 7N9T. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	AA1	A	294	304	Right-handed alpha
Helix 2	AA2	A	337	343	Right-handed alpha
Helix 3	AA3	A	364	368	Right-handed 310
Helix 4	AA4	A	383	387	Right-handed 310
Helix 5	AA5	A	405	410	Right-handed alpha
Helix 6	AA6	A	416	422	Right-handed alpha
Helix 7	AA7	A	438	443	Right-handed alpha
Helix 8	AA8	A	737	743	Right-handed alpha
Helix 9	AA9	A	746	755	Right-handed alpha
Helix 10	AB1	A	757	783	Right-handed alpha
Helix 11	AB2	A	816	825	Right-handed alpha
Helix 12	AB3	A	849	854	Right-handed alpha
Helix 13	AB4	A	866	885	Right-handed alpha
Helix 14	AB5	A	887	891	Right-handed 310
Helix 15	AB6	A	897	909	Right-handed alpha
Helix 16	AB7	A	913	941	Right-handed alpha
Helix 17	AB8	A	945	965	Right-handed alpha
Helix 18	AB9	A	966	968	Right-handed 310
Helix 19	AC1	A	976	984	Right-handed alpha
Helix 20	AC2	A	985	1032	Right-handed alpha
Helix 21	AC3	A	1140	1147	Right-handed alpha
Helix 22	AC4	B	294	304	Right-handed alpha
Helix 23	AC5	B	337	343	Right-handed alpha
Helix 24	AC6	B	364	368	Right-handed 310
Helix 25	AC7	B	383	387	Right-handed 310
Helix 26	AC8	B	405	410	Right-handed alpha
Helix 27	AC9	B	416	422	Right-handed alpha
Helix 28	AD1	B	438	443	Right-handed alpha
Helix 29	AD2	B	737	743	Right-handed alpha
Helix 30	AD3	B	746	755	Right-handed alpha
Helix 31	AD4	B	757	783	Right-handed alpha
Helix 32	AD5	B	816	825	Right-handed alpha
Helix 33	AD6	B	849	854	Right-handed alpha
Helix 34	AD7	B	866	885	Right-handed alpha
Helix 35	AD8	B	887	891	Right-handed 310
Helix 36	AD9	B	897	909	Right-handed alpha
Helix 37	AE1	B	913	941	Right-handed alpha
Helix 38	AE2	B	945	965	Right-handed alpha
Helix 39	AE3	B	966	968	Right-handed 310
Helix 40	AE4	B	976	984	Right-handed alpha
Helix 41	AE5	B	985	1032	Right-handed alpha
Helix 42	AE6	B	1140	1147	Right-handed alpha
Helix 43	AE7	C	294	304	Right-handed alpha
Helix 44	AE8	C	337	343	Right-handed alpha
Helix 45	AE9	C	364	368	Right-handed 310
Helix 46	AF1	C	383	387	Right-handed 310
Helix 47	AF2	C	405	410	Right-handed alpha
Helix 48	AF3	C	416	422	Right-handed alpha
Helix 49	AF4	C	438	443	Right-handed alpha
Helix 50	AF5	C	737	743	Right-handed alpha
Helix 51	AF6	C	746	755	Right-handed alpha
Helix 52	AF7	C	757	783	Right-handed alpha
Helix 53	AF8	C	816	825	Right-handed alpha
Helix 54	AF9	C	849	854	Right-handed alpha
Helix 55	AG1	C	866	885	Right-handed alpha
Helix 56	AG2	C	887	891	Right-handed 310
Helix 57	AG3	C	897	909	Right-handed alpha
Helix 58	AG4	C	913	941	Right-handed alpha
Helix 59	AG5	C	945	965	Right-handed alpha
Helix 60	AG6	C	966	968	Right-handed 310
Helix 61	AG7	C	976	984	Right-handed alpha
Helix 62	AG8	C	985	1032	Right-handed alpha
Helix 63	AG9	C	1140	1147	Right-handed alpha
Helix 64	AH1	D	84	88	Right-handed 310
Helix 65	AH2	E	84	88	Right-handed 310
Helix 66	AH3	F	84	88	Right-handed 310

There are 60 sheets in PDB entry 7N9T. 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, AD3, AD4, AD5, AD6, AD7, AD8, AD9, AE1, AE2, AE3, AE4, AE5, AE6, AE7, AE8, AE9, AF1, AF2, AF3, AF4, AF5, AF6, AF7, AF8, AF9, AG1, AG2, AG3, AG4, AG5, AG6,

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	27	30	first strand
Strand 2	A	61	64	anti-parallel

Back to list of sheets
Back to top of page

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	36	37	first strand
Strand 2	A	222	223	parallel

Back to list of sheets
Back to top of page

There are 3 strands in AA3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	48	52	first strand
Strand 2	A	274	278	anti-parallel
Strand 3	A	287	290	anti-parallel

Back to list of sheets
Back to top of page

There are 5 strands in AA4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	225	229	first strand
Strand 2	A	200	208	anti-parallel
Strand 3	A	189	197	anti-parallel
Strand 4	A	89	94	anti-parallel
Strand 5	A	265	266	anti-parallel

Back to list of sheets
Back to top of page

There are 3 strands in AA5 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	238	244	anti-parallel
Strand 3	A	141	142	parallel

Back to list of sheets
Back to top of page

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	A	118	122	first strand
Strand 2	A	125	129	anti-parallel

Back to list of sheets
Back to top of page

There are 4 strands in AA7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	312	314	first strand
Strand 2	A	595	598	anti-parallel
Strand 3	A	609	613	anti-parallel
Strand 4	A	648	651	anti-parallel

Back to list of sheets
Back to top of page

There are 4 strands in AA8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	376	379	first strand
Strand 2	A	431	437	anti-parallel
Strand 3	A	508	514	anti-parallel
Strand 4	A	396	402	anti-parallel

Back to list of sheets
Back to top of page

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	A	453	454	first strand
Strand 2	A	492	493	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AB1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	473	474	first strand
Strand 2	A	488	489	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AB2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	539	543	first strand
Strand 2	A	546	550	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AB3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	575	577	first strand
Strand 2	A	584	586	anti-parallel

Back to list of sheets
Back to top of page

There are 4 strands in AB4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	654	655	first strand
Strand 2	A	693	696	parallel
Strand 3	A	670	673	anti-parallel
Strand 4	A	664	667	anti-parallel

Back to list of sheets
Back to top of page

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	A	701	702	first strand
Strand 2	C	787	788	parallel

Back to list of sheets
Back to top of page

There are 3 strands in AB6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	712	719	first strand
Strand 2	A	1059	1075	anti-parallel
Strand 3	A	722	728	anti-parallel

Back to list of sheets
Back to top of page

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	A	712	719	first strand
Strand 2	A	1059	1075	anti-parallel
Strand 3	A	1047	1056	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AB8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	787	788	first strand
Strand 2	B	701	702	parallel

Back to list of sheets
Back to top of page

There are 3 strands in AB9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	1081	1082	first strand
Strand 2	A	1087	1090	anti-parallel
Strand 3	A	1120	1121	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AC1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	1094	1097	first strand
Strand 2	A	1102	1105	anti-parallel

Back to list of sheets
Back to top of page

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	B	27	30	first strand
Strand 2	B	61	64	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AC3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	36	37	first strand
Strand 2	B	222	223	parallel

Back to list of sheets
Back to top of page

There are 3 strands in AC4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	48	52	first strand
Strand 2	B	274	278	anti-parallel
Strand 3	B	287	290	anti-parallel

Back to list of sheets
Back to top of page

There are 5 strands in AC5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	225	229	first strand
Strand 2	B	200	208	anti-parallel
Strand 3	B	189	197	anti-parallel
Strand 4	B	89	94	anti-parallel
Strand 5	B	265	266	anti-parallel

Back to list of sheets
Back to top of page

There are 3 strands in AC6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	101	106	first strand
Strand 2	B	238	244	anti-parallel
Strand 3	B	141	142	parallel

Back to list of sheets
Back to top of page

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	B	118	122	first strand
Strand 2	B	125	129	anti-parallel

Back to list of sheets
Back to top of page

There are 4 strands in AC8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	312	314	first strand
Strand 2	B	595	598	anti-parallel
Strand 3	B	609	613	anti-parallel
Strand 4	B	648	651	anti-parallel

Back to list of sheets
Back to top of page

There are 4 strands in AC9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	376	379	first strand
Strand 2	B	431	437	anti-parallel
Strand 3	B	508	514	anti-parallel
Strand 4	B	396	402	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AD1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	453	454	first strand
Strand 2	B	492	493	anti-parallel

Back to list of sheets
Back to top of page

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	B	473	474	first strand
Strand 2	B	488	489	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AD3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	539	543	first strand
Strand 2	B	546	550	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AD4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	575	577	first strand
Strand 2	B	584	586	anti-parallel

Back to list of sheets
Back to top of page

There are 4 strands in AD5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	654	655	first strand
Strand 2	B	693	696	parallel
Strand 3	B	670	673	anti-parallel
Strand 4	B	664	667	anti-parallel

Back to list of sheets
Back to top of page

There are 3 strands in AD6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	712	719	first strand
Strand 2	B	1059	1075	anti-parallel
Strand 3	B	722	728	anti-parallel

Back to list of sheets
Back to top of page

There are 3 strands in AD7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	712	719	first strand
Strand 2	B	1059	1075	anti-parallel
Strand 3	B	1047	1056	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AD8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	787	788	first strand
Strand 2	C	701	702	parallel

Back to list of sheets
Back to top of page

There are 3 strands in AD9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	1081	1082	first strand
Strand 2	B	1087	1090	anti-parallel
Strand 3	B	1120	1121	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AE1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	1094	1097	first strand
Strand 2	B	1102	1105	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AE2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	27	30	first strand
Strand 2	C	61	64	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AE3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	36	37	first strand
Strand 2	C	222	223	parallel

Back to list of sheets
Back to top of page

There are 3 strands in AE4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	48	52	first strand
Strand 2	C	274	278	anti-parallel
Strand 3	C	287	290	anti-parallel

Back to list of sheets
Back to top of page

There are 5 strands in AE5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	225	229	first strand
Strand 2	C	200	208	anti-parallel
Strand 3	C	189	197	anti-parallel
Strand 4	C	89	94	anti-parallel
Strand 5	C	265	266	anti-parallel

Back to list of sheets
Back to top of page

There are 3 strands in AE6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	101	106	first strand
Strand 2	C	238	244	anti-parallel
Strand 3	C	141	142	parallel

Back to list of sheets
Back to top of page

There are 2 strands in AE7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	118	122	first strand
Strand 2	C	125	129	anti-parallel

Back to list of sheets
Back to top of page

There are 4 strands in AE8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	312	314	first strand
Strand 2	C	595	598	anti-parallel
Strand 3	C	609	613	anti-parallel
Strand 4	C	648	651	anti-parallel

Back to list of sheets
Back to top of page

There are 4 strands in AE9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	376	379	first strand
Strand 2	C	431	437	anti-parallel
Strand 3	C	508	514	anti-parallel
Strand 4	C	396	402	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AF1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	453	454	first strand
Strand 2	C	492	493	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AF2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	473	474	first strand
Strand 2	C	488	489	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AF3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	539	543	first strand
Strand 2	C	546	550	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AF4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	575	577	first strand
Strand 2	C	584	586	anti-parallel

Back to list of sheets
Back to top of page

There are 4 strands in AF5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	654	655	first strand
Strand 2	C	693	696	parallel
Strand 3	C	670	673	anti-parallel
Strand 4	C	664	667	anti-parallel

Back to list of sheets
Back to top of page

There are 3 strands in AF6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	712	719	first strand
Strand 2	C	1059	1075	anti-parallel
Strand 3	C	722	728	anti-parallel

Back to list of sheets
Back to top of page

There are 3 strands in AF7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	712	719	first strand
Strand 2	C	1059	1075	anti-parallel
Strand 3	C	1047	1056	anti-parallel

Back to list of sheets
Back to top of page

There are 3 strands in AF8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	1081	1082	first strand
Strand 2	C	1087	1090	anti-parallel
Strand 3	C	1120	1121	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AF9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	1094	1097	first strand
Strand 2	C	1102	1105	anti-parallel

Back to list of sheets
Back to top of page

There are 5 strands in AG1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	57	59	first strand
Strand 2	D	43	51	anti-parallel
Strand 3	D	34	40	anti-parallel
Strand 4	D	89	94	anti-parallel
Strand 5	D	113	115	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AG2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	67	72	first strand
Strand 2	D	75	80	anti-parallel

Back to list of sheets
Back to top of page

There are 5 strands in AG3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	57	59	first strand
Strand 2	E	43	51	anti-parallel
Strand 3	E	34	40	anti-parallel
Strand 4	E	89	94	anti-parallel
Strand 5	E	113	115	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AG4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	67	72	first strand
Strand 2	E	75	80	anti-parallel

Back to list of sheets
Back to top of page

There are 5 strands in AG5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	57	59	first strand
Strand 2	F	43	51	anti-parallel
Strand 3	F	34	40	anti-parallel
Strand 4	F	89	94	anti-parallel
Strand 5	F	113	115	anti-parallel

Back to list of sheets
Back to top of page

There are 2 strands in AG6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	67	72	first strand
Strand 2	F	75	80	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: 7N9T

Analysis of interatomic Contacts of Structural Units in PDB entry:
7N9T