Analysis of interatomic Contacts of Structural Units in PDB entry:
4A2X

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 4A2X entry

There are 8 chains in PDB entry 4A2X (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	GLN 807	PRO 931
B	GLN 807	PRO 931
C	GLN 807	PRO 931
D	GLN 807	PRO 931
L	G 1	G 14
M	C 1	C 14
N	G 1	G 14
O	C 1	C 14

There are 12 helices in PDB entry 4A2X. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	837	842	Right-handed alpha
Helix 2	2	A	907	915	Right-handed alpha
Helix 3	3	A	922	930	Right-handed alpha
Helix 4	4	B	837	842	Right-handed alpha
Helix 5	5	B	907	915	Right-handed alpha
Helix 6	6	B	922	930	Right-handed alpha
Helix 7	7	C	837	842	Right-handed alpha
Helix 8	8	C	907	915	Right-handed alpha
Helix 9	9	C	922	930	Right-handed alpha
Helix 10	10	D	837	842	Right-handed alpha
Helix 11	11	D	907	915	Right-handed alpha
Helix 12	12	D	922	930	Right-handed alpha

There are 16 sheets in PDB entry 4A2X. Click on sheet of interest to get list of strands forming it: AA, AB, AC, AD, BA, BB, BC, BD, CA, CB, CC, CD, A, DB, C, DD,

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	818	821	first strand
Strand 2	A	809	812	anti-parallel
Strand 3	A	895	897	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	825	828	first strand
Strand 2	A	832	835	anti-parallel
Strand 3	A	884	890	anti-parallel
Strand 4	A	874	881	anti-parallel
Strand 5	A	858	866	anti-parallel
Strand 6	A	854	855	parallel

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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	A	825	828	first strand
Strand 2	A	832	835	anti-parallel
Strand 3	A	884	890	anti-parallel
Strand 4	A	874	881	anti-parallel
Strand 5	A	858	866	anti-parallel
Strand 6	A	844	848	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	854	855	first strand
Strand 2	A	858	866	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	818	821	first strand
Strand 2	B	809	812	anti-parallel
Strand 3	B	895	897	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	825	828	first strand
Strand 2	B	832	835	anti-parallel
Strand 3	B	884	890	anti-parallel
Strand 4	B	874	881	anti-parallel
Strand 5	B	858	866	anti-parallel
Strand 6	B	854	855	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	825	828	first strand
Strand 2	B	832	835	anti-parallel
Strand 3	B	884	890	anti-parallel
Strand 4	B	874	881	anti-parallel
Strand 5	B	858	866	anti-parallel
Strand 6	B	844	848	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	854	855	first strand
Strand 2	B	858	866	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	818	821	first strand
Strand 2	C	809	812	anti-parallel
Strand 3	C	895	897	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	825	828	first strand
Strand 2	C	832	835	anti-parallel
Strand 3	C	884	890	anti-parallel
Strand 4	C	874	881	anti-parallel
Strand 5	C	858	866	anti-parallel
Strand 6	C	854	855	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	825	828	first strand
Strand 2	C	832	835	anti-parallel
Strand 3	C	884	890	anti-parallel
Strand 4	C	874	881	anti-parallel
Strand 5	C	858	866	anti-parallel
Strand 6	C	844	848	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	854	855	first strand
Strand 2	C	858	866	parallel

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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	D	818	821	first strand
Strand 2	D	809	812	anti-parallel
Strand 3	D	895	897	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	825	828	first strand
Strand 2	D	832	835	anti-parallel
Strand 3	D	884	890	anti-parallel
Strand 4	D	874	881	anti-parallel
Strand 5	D	858	866	anti-parallel
Strand 6	D	854	855	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	825	828	first strand
Strand 2	D	832	835	anti-parallel
Strand 3	D	884	890	anti-parallel
Strand 4	D	874	881	anti-parallel
Strand 5	D	858	866	anti-parallel
Strand 6	D	844	848	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	854	855	first strand
Strand 2	D	858	866	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: 4A2X

Analysis of interatomic Contacts of Structural Units in PDB entry:
4A2X