Contacts of the helix formed by residues 14 - 21 (chain A) in PDB entry 2I59
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 SER 14 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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10A LYS 3.3 1.4 + - - -
11A TRP 3.4 4.7 - - - +
12A ALA 3.6 0.4 - - - -
13A ALA* 1.3 88.4 + - - +
15A LEU* 1.3 65.2 + - - +
16A GLU* 4.1 9.6 - - - -
17A ASN* 3.0 36.0 + - - +
18A LEU 3.3 3.6 + - - -
116A TYR* 3.1 7.4 - - - -
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Residues in contact with LEU 15 (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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14A SER* 1.3 71.6 - - - +
16A GLU* 1.3 56.5 + - - +
18A LEU* 3.2 25.2 + - + +
19A LEU* 2.8 36.2 + - + +
28A PHE* 5.4 2.2 - - + -
108A PHE* 3.5 48.7 - - + +
111A MET* 3.8 28.9 - - + +
112A LYS* 3.8 21.4 - - + +
115A SER* 5.7 0.9 - - - -
116A TYR* 2.8 30.9 + - + +
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Residues in contact with GLU 16 (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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14A SER* 3.0 8.2 - - - -
15A LEU* 1.3 77.1 - - - +
17A ASN* 1.3 58.3 + - - +
19A LEU* 3.1 7.1 + - + +
20A GLU* 2.7 53.4 + - + +
108A PHE* 4.7 13.8 - - + -
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Residues in contact with ASN 17 (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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10A LYS* 3.0 37.3 + - + +
11A TRP* 4.1 2.2 - - - -
13A ALA* 3.5 16.8 - - - +
14A SER* 3.0 21.5 + - - +
16A GLU* 1.3 81.4 - - - +
18A LEU* 1.3 55.6 + - - +
20A GLU* 3.6 13.3 - - - +
21A ASP* 2.8 38.8 + - - +
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Residues in contact with LEU 18 (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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11A TRP* 3.4 42.1 - - + +
14A SER 3.3 1.9 + - - +
15A LEU* 3.2 28.7 + - + +
17A ASN* 1.3 80.9 - - - +
19A LEU* 1.3 71.4 + - + +
20A GLU 3.2 3.5 + - - -
21A ASP 3.2 18.7 - - - +
24A GLY 3.8 5.8 - - - +
25A VAL* 3.3 9.0 + - - +
28A PHE* 3.4 56.3 - - + -
116A TYR* 5.3 4.5 - - + -
119A PHE* 5.8 4.3 - - + -
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Residues in contact with LEU 19 (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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15A LEU* 2.8 30.4 + - + +
16A GLU* 3.1 6.3 + - - +
18A LEU* 1.3 85.9 - - + +
20A GLU* 1.3 57.5 + - - +
25A VAL* 3.9 17.5 - - + +
28A PHE* 5.0 4.9 - - + -
41A VAL* 5.4 5.4 - - + -
44A TRP* 3.7 62.5 - - + -
45A LEU* 4.8 5.4 - - + +
108A PHE* 3.8 21.1 - - + -
111A MET* 4.0 20.4 - - + -
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Residues in contact with GLU 20 (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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16A GLU* 2.7 32.1 + - + +
17A ASN* 3.6 13.7 - - - +
19A LEU* 1.3 80.1 - - - +
21A ASP* 1.3 65.7 + - - +
22A PRO* 3.4 8.5 - - - +
25A VAL* 5.1 1.4 - - - +
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Residues in contact with ASP 21 (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 GLN* 5.4 1.3 - - - +
7A SER* 5.6 0.2 - - - -
10A LYS* 4.8 16.6 - - + +
11A TRP* 3.0 19.3 + - + +
17A ASN 2.8 20.9 + - - +
18A LEU 3.2 4.3 - - - +
20A GLU* 1.3 74.0 + - - +
22A PRO* 1.3 77.9 - - - +
23A GLU* 3.4 13.9 + - - +
24A GLY 2.9 32.6 + - - -
25A VAL* 3.1 11.3 + - - +
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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