Contacts of the helix formed by residues 28 - 32 (chain A) in PDB entry 4AR3
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 LYS 28 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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0A MET* 3.6 25.1 - - + -
14A GLU* 2.7 23.5 - - - +
26A GLY 4.7 0.4 - - - +
27A THR* 1.3 90.9 + - - +
29A PHE* 1.3 69.6 + - - +
30A GLU* 3.2 13.2 - - - +
31A GLU* 3.0 30.8 + - + +
32A LEU* 3.0 1.7 - - - -
2164A DOD 3.8 17.5 - - - +
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Residues in contact with PHE 29 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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3A TRP* 3.3 66.4 - + + +
12A TYR* 3.6 12.5 - + + -
14A GLU* 2.9 7.7 + - - +
27A THR 3.7 0.8 + - - -
28A LYS* 1.3 70.6 - - - +
30A GLU* 1.3 65.2 + - + +
32A LEU* 2.4 47.3 - - + +
36A TRP* 4.2 7.6 - + - -
45A LYS* 2.9 66.2 + - + -
48A PHE* 3.5 33.0 - + + -
2125A DOD 4.5 6.5 - - - -
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Residues in contact with GLU 30 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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3A TRP* 3.4 9.1 - - + -
28A LYS* 3.2 8.2 - - - +
29A PHE* 1.3 82.3 + - + +
31A GLU* 1.3 60.4 + - - +
32A LEU 3.4 0.2 - - - -
45A LYS* 3.4 8.0 + - - +
2001A DOD 2.6 22.8 + - - -
2071A DOD 2.8 18.7 + - - +
2077A DOD 2.6 29.0 + - - -
2078A DOD 4.4 7.4 - - - +
2093A DOD 4.0 19.5 - - - +
2099A DOD 2.8 17.3 + - - -
2114A DOD 4.1 4.9 - - - +
2115A DOD 3.3 8.1 + - - -
2164A DOD 3.9 15.9 + - - +
2165A DOD 3.9 3.0 + - - +
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Residues in contact with GLU 31 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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26A GLY 4.3 1.6 - - - +
27A THR* 3.3 19.6 + - - -
28A LYS* 3.0 41.7 + - + +
30A GLU* 1.3 77.5 + - - +
32A LEU* 1.3 67.7 + - - +
33A PRO* 3.5 1.4 + - - -
2083A DOD 3.2 12.3 + - - -
2097A DOD 2.9 19.3 + - - +
2099A DOD 4.2 0.5 + - - -
2115A DOD 3.2 13.2 + - - -
2128A DOD 4.1 15.6 + - - -
2164A DOD 4.5 9.0 - - - +
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Residues in contact with LEU 32 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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12A TYR* 3.7 13.5 - - + +
23A ILE* 2.9 47.1 - - + +
27A THR* 3.6 2.6 - - - -
28A LYS 3.0 4.0 - - - -
29A PHE* 2.4 56.2 + - + +
31A GLU* 1.3 77.5 + - - +
33A PRO* 1.3 76.4 - - + +
36A TRP* 3.8 30.1 - - + -
45A LYS* 3.2 10.3 + - - +
2083A DOD 3.5 3.3 + - - -
2099A DOD 2.2 30.7 + - - -
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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