Analysis of interatomic Contacts of Structural Units in PDB entry:
4TWA

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 4TWA entry

There are 2 chains in PDB entry 4TWA (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	MET 252	TYR 746
B	MET 252	TYR 746

There are 34 helices in PDB entry 4TWA. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	AA1	A	261	273	Right-handed alpha
Helix 2	AA2	A	288	309	Right-handed alpha
Helix 3	AA3	A	321	324	Right-handed 310
Helix 4	AA4	A	325	332	Right-handed alpha
Helix 5	AA5	A	336	343	Right-handed 310
Helix 6	AA6	A	351	356	Right-handed alpha
Helix 7	AA7	A	360	372	Right-handed alpha
Helix 8	AA8	A	374	378	Right-handed 310
Helix 9	AA9	A	416	440	Right-handed alpha
Helix 10	AB1	A	484	491	Right-handed alpha
Helix 11	AB2	A	513	524	Right-handed alpha
Helix 12	AB3	A	532	536	Right-handed 310
Helix 13	AB4	A	551	568	Right-handed alpha
Helix 14	AB5	A	582	593	Right-handed alpha
Helix 15	AB6	A	602	607	Right-handed alpha
Helix 16	AB7	A	628	655	Right-handed alpha
Helix 17	AB8	A	662	671	Right-handed alpha
Helix 18	AB9	A	683	696	Right-handed alpha
Helix 19	AC1	B	261	273	Right-handed alpha
Helix 20	AC2	B	288	309	Right-handed alpha
Helix 21	AC3	B	353	357	Right-handed 310
Helix 22	AC4	B	359	368	Right-handed alpha
Helix 23	AC5	B	369	372	Right-handed 310
Helix 24	AC6	B	374	378	Right-handed 310
Helix 25	AC7	B	416	440	Right-handed alpha
Helix 26	AC8	B	484	491	Right-handed alpha
Helix 27	AC9	B	513	524	Right-handed alpha
Helix 28	AD1	B	532	536	Right-handed 310
Helix 29	AD2	B	548	568	Right-handed alpha
Helix 30	AD3	B	582	592	Right-handed alpha
Helix 31	AD4	B	602	608	Right-handed alpha
Helix 32	AD5	B	628	655	Right-handed alpha
Helix 33	AD6	B	661	670	Right-handed alpha
Helix 34	AD7	B	684	697	Right-handed alpha

There are 10 sheets in PDB entry 4TWA. Click on sheet of interest to get list of strands forming it: AA1, AA2, AA3, AA4, AA5, AA6, AA7, AA8, AA9, AB1,

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	276	278	first strand
Strand 2	A	285	287	anti-parallel

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There are 11 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	312	313	first strand
Strand 2	A	380	388	parallel
Strand 3	A	405	414	anti-parallel
Strand 4	A	505	512	anti-parallel
Strand 5	A	472	483	anti-parallel
Strand 6	A	459	467	anti-parallel
Strand 7	A	444	447	anti-parallel
Strand 8	A	712	717	anti-parallel
Strand 9	A	738	743	anti-parallel
Strand 10	A	674	679	anti-parallel
Strand 11	A	656	658	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	A	493	495	first strand
Strand 2	A	501	503	anti-parallel

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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	573	575	first strand
Strand 2	A	540	544	parallel
Strand 3	A	597	601	parallel
Strand 4	A	612	615	anti-parallel
Strand 5	A	621	623	anti-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	B	276	278	first strand
Strand 2	B	285	287	anti-parallel

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There are 7 strands in AA6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	312	313	first strand
Strand 2	B	380	389	parallel
Strand 3	B	404	413	anti-parallel
Strand 4	B	506	512	anti-parallel
Strand 5	B	472	483	anti-parallel
Strand 6	B	738	745	parallel
Strand 7	B	712	713	anti-parallel

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There are 7 strands in AA7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	656	658	first strand
Strand 2	B	674	679	parallel
Strand 3	B	738	745	anti-parallel
Strand 4	B	472	483	parallel
Strand 5	B	459	467	anti-parallel
Strand 6	B	444	448	anti-parallel
Strand 7	B	715	717	anti-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	B	493	495	first strand
Strand 2	B	501	503	anti-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	B	529	530	first strand
Strand 2	B	593	594	parallel

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There are 5 strands in AB1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	573	575	first strand
Strand 2	B	540	544	parallel
Strand 3	B	597	601	parallel
Strand 4	B	612	615	anti-parallel
Strand 5	B	621	623	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: 4TWA

Analysis of interatomic Contacts of Structural Units in PDB entry:
4TWA