Contacts of the helix formed by residues 32 - 36 (chain F) in PDB entry 3IZ0
Residue contacts within the protein 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). A
short description of the analytical approach
is given at the end of the page.
Note:
Non-standard 3 letter residue
codes indicate a heterogroup. To identify
and analyse, use LPC software
Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC - hydrophobic-hydrophilic contact (destabilizing contact)
+/- - indicates presence/absence of a specific contacts
* - indicates residues forming contacts by their side chain
(including CA atoms)
Residues in contact with THR 32 (chain F).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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15F VAL* 4.0 9.6 - - - +
19F ARG* 4.9 5.2 - - - +
29F LYS 5.2 2.7 - - - +
30F ASN 3.7 10.7 + - - +
31F LEU* 1.3 82.4 - - - +
33F LYS* 1.3 67.4 + - - +
34F ASN* 2.7 26.3 + - - -
35F ASP* 3.0 31.0 + - - +
36F LEU* 4.0 1.7 + - - +
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Residues in contact with LYS 33 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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11F VAL* 3.8 23.7 - - + +
12F ALA* 3.7 38.4 - - + +
15F VAL* 3.9 7.9 - - + +
32F THR* 1.3 72.0 - - - +
34F ASN* 1.3 57.9 + - - +
36F LEU* 2.9 9.2 + - - +
37F TYR* 2.9 28.6 + - + +
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Residues in contact with ASN 34 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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32F THR* 2.7 30.6 + - - -
33F LYS* 1.3 77.8 - - - +
35F ASP* 1.3 57.4 + - - +
36F LEU 3.3 1.8 - - - -
37F TYR 3.3 15.8 - - - +
38F PRO* 5.1 2.2 - - + +
39F ASN 3.9 10.9 - - - +
41F LYS* 3.7 19.6 + - - +
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Residues in contact with ASP 35 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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30F ASN 3.9 6.8 - - - +
31F LEU* 3.1 26.8 - - - +
32F THR* 3.0 29.1 + - - +
33F LYS 3.0 1.2 + - - -
34F ASN* 1.3 78.3 + - - +
36F LEU* 1.3 62.4 + - - +
40F PRO* 3.6 1.7 - - - +
41F LYS* 2.9 65.0 + - + +
44F VAL* 3.5 17.7 - - + +
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Residues in contact with LEU 36 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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11F VAL* 4.1 13.1 - - + +
14F ILE* 4.4 14.1 - - + -
15F VAL* 4.4 11.9 - - + -
18F ILE* 4.5 5.8 - - + -
31F LEU* 4.2 19.1 - - + -
32F THR 4.5 1.6 - - - +
33F LYS 2.9 6.9 + - - +
35F ASP* 1.3 90.0 - - - +
37F TYR* 1.3 62.6 + - - +
40F PRO* 3.3 28.0 - - + +
44F VAL* 4.9 1.8 - - + -
45F LEU* 3.5 34.8 - - + -
48F ILE* 4.3 9.0 - - + -
114F ALA* 4.5 6.2 - - - +
117F THR* 4.8 3.1 + - - +
121F LEU* 3.9 21.5 - - + -
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A short description of the
analytical approach
The contact analysis used in this page
is based upon the approach
developed in:
Sobolev V., Wade R.C., Vriend G.
and Edelman M. PROTEINS (1996)
25, 120-129.
Contact legitimacy depends on the hydrophobic-hydrophilic
properties of the contacting atoms. In order to
define it, for each inter-atomic contact,
eight atom classes have been introduced:
I Hydrophilic - N and O that can donate and accept hydrogen bonds
(e.g., oxygen of hydroxyl group of Ser. or Thr)
II Acceptor - N or O that can only accept a hydrogen bond
III Donor - N that can only donate a hydrogen bond
IV Hydrophobic - Cl, Br, I and all C atoms that are not in
aromatic rings and do not have a covalent bond to
a N or O atom
V Aromatic - C in aromatic rings irrespective of any other
bonds formed by the atom
VI Neutral - C atoms that have a covalent bond to at least one
atom of class I or two or more atoms from class II
or III; atoms; S, F, P, and metal atoms in all cases
VII Neutral-donor - C atoms that have a covalent bond with only one
atom of class III
VIII Neutral-acceptor - C atoms that have a covalent bond with only
one atom of class II
For each pair of contacts the state of legitimacy
is shown below:
Legend:
+, legitimate
-, illegitimate
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Atomic class I II III IV V VI VII VIII
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I (Hydrophilic) + + + - + + + +
II (Acceptor) + - + - + + + -
III (Donor) + + - - + + - +
IV (Hydrophobic) - - - + + + + +
V (Aromatic) + + + + + + + +
VI (Neutral) + + + + + + + +
VII (Neutral-donor) + + - + + + - +
VIII (Neutral-acceptor) + - + + + + + -
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Warning!
Atom classes for heterogroups are automatically
assigned based on the atomic coordinates. However, in
three cases (see below) the automatic assignment
is currently ambiguous. In these
cases, the user is advised to manually analyse
the full list of contacts using
LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are
considered "aromatic" (Class V) if the ring is approximately
planar, and "hydrophobic" (Class IV) or "neutral" (Classes
VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
"hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
"carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).
Please E-mail any
questions and/or suggestions concerning this page to
Vladimir.Sobolev@weizmann.ac.il