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

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 4CHA entry

There are 6 chains in PDB entry 4CHA (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	CYS 1	SER 11
B	ILE 16	TYR 146
C	ALA 149	ASN 245
E	CYS 1	LEU 10
F	ILE 16	TYR 146
G	ALA 149	ASN 245

There are 6 helices in PDB entry 4CHA. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	H1A	C	164	176	Right-handed alpha
Helix 2	H2A	C	230	235	Right-handed 310
Helix 3	H3A	C	235	245	Right-handed alpha
Helix 4	H1B	G	164	176	Right-handed alpha
Helix 5	H2B	G	230	235	Right-handed 310
Helix 6	H3B	G	235	245	Right-handed alpha

There are 4 sheets in PDB entry 4CHA. Click on sheet of interest to get list of strands forming it: B1A, B2A, B1B, B2B,

There are 7 strands in B1A sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	29	35	first strand
Strand 2	B	39	48	anti-parallel
Strand 3	B	51	54	anti-parallel
Strand 4	B	103	108	anti-parallel
Strand 5	B	81	91	anti-parallel
Strand 6	B	65	68	anti-parallel
Strand 7	B	29	35	anti-parallel

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There are 7 strands in B2A sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	134	140	first strand
Strand 2	C	156	163	anti-parallel
Strand 3	C	179	184	anti-parallel
Strand 4	C	226	231	anti-parallel
Strand 5	C	206	215	anti-parallel
Strand 6	C	197	203	anti-parallel
Strand 7	B	134	140	anti-parallel

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There are 7 strands in B1B sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	29	35	first strand
Strand 2	F	39	48	anti-parallel
Strand 3	F	51	54	anti-parallel
Strand 4	F	103	108	anti-parallel
Strand 5	F	81	91	anti-parallel
Strand 6	F	65	68	anti-parallel
Strand 7	F	29	35	anti-parallel

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There are 7 strands in B2B sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	134	140	first strand
Strand 2	G	156	163	anti-parallel
Strand 3	G	179	184	anti-parallel
Strand 4	G	226	231	anti-parallel
Strand 5	G	206	215	anti-parallel
Strand 6	G	197	203	anti-parallel
Strand 7	F	134	140	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: 4CHA

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