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

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 23SQ entry

There are 2 chains in PDB entry 23SQ (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
B	ASN 837	PHE 1259
A	ASN 23	LEU 577

There are 14 helices in PDB entry 23SQ. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	AA1	B	848	856	Right-handed alpha
Helix 2	AA2	B	1136	1150	Right-handed alpha
Helix 3	AA3	B	1157	1173	Right-handed alpha
Helix 4	AA4	B	1180	1190	Right-handed alpha
Helix 5	AA5	B	1198	1201	Right-handed 310
Helix 6	AA6	A	32	45	Right-handed alpha
Helix 7	AA7	A	54	73	Right-handed alpha
Helix 8	AA8	A	115	119	Right-handed 310
Helix 9	AA9	A	120	128	Right-handed alpha
Helix 10	AB1	A	138	157	Right-handed alpha
Helix 11	AB2	A	202	210	Right-handed alpha
Helix 12	AB3	A	219	233	Right-handed alpha
Helix 13	AB4	A	458	462	Right-handed 310
Helix 14	AB5	A	528	532	Right-handed 310

There are 5 sheets in PDB entry 23SQ. Click on sheet of interest to get list of strands forming it: AA1, AA2, AA3, AA4, AA5,

There are 22 strands in AA1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	838	842	first strand
Strand 2	B	858	874	anti-parallel
Strand 3	B	880	895	anti-parallel
Strand 4	B	901	912	anti-parallel
Strand 5	B	914	923	anti-parallel
Strand 6	B	927	937	anti-parallel
Strand 7	B	941	951	anti-parallel
Strand 8	B	953	957	first strand
Strand 9	B	961	965	anti-parallel
Strand 10	B	968	974	anti-parallel
Strand 11	B	977	985	anti-parallel
Strand 12	B	988	992	anti-parallel
Strand 13	B	1026	1042	parallel
Strand 14	B	1045	1057	anti-parallel
Strand 15	B	1062	1066	anti-parallel
Strand 16	B	1068	1069	anti-parallel
Strand 17	B	1073	1077	anti-parallel
Strand 18	B	1080	1084	anti-parallel
Strand 19	B	1087	1092	anti-parallel
Strand 20	B	1099	1104	anti-parallel
Strand 21	B	1119	1124	anti-parallel
Strand 22	B	1127	1131	anti-parallel

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There are 4 strands in AA2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	1007	1010	first strand
Strand 2	A	162	171	parallel
Strand 3	A	176	184	anti-parallel
Strand 4	A	105	114	parallel

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There are 23 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	1193	1196	first strand
Strand 2	B	1203	1208	anti-parallel
Strand 3	B	1214	1221	anti-parallel
Strand 4	B	1228	1233	anti-parallel
Strand 5	B	1239	1245	anti-parallel
Strand 6	B	1250	1259	anti-parallel
Strand 7	A	266	275	anti-parallel
Strand 8	A	280	288	anti-parallel
Strand 9	A	297	305	anti-parallel
Strand 10	A	308	318	anti-parallel
Strand 11	A	326	331	anti-parallel
Strand 12	A	334	339	anti-parallel
Strand 13	A	342	355	anti-parallel
Strand 14	A	362	376	anti-parallel
Strand 15	A	379	398	anti-parallel
Strand 16	A	405	416	anti-parallel
Strand 17	A	426	440	anti-parallel
Strand 18	A	443	455	anti-parallel
Strand 19	A	498	510	anti-parallel
Strand 20	A	514	526	anti-parallel
Strand 21	A	535	546	anti-parallel
Strand 22	A	549	558	anti-parallel
Strand 23	A	568	573	anti-parallel

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There are 3 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	25	29	first strand
Strand 2	A	93	99	parallel
Strand 3	A	78	83	anti-parallel

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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	190	197	first strand
Strand 2	A	253	262	parallel
Strand 3	A	236	243	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: 23SQ

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