Contacts of the helix formed by residues 18 - 25 (chain D) in PDB entry 4F9K
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 CYS 18 (chain D).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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39C CYS* 2.0 59.2 - - + -
42C LYS* 3.9 22.4 - - - +
16D LYS* 3.0 12.1 + - + +
17D GLY* 1.3 73.0 - - - +
19D GLU* 1.3 52.8 + - - +
20D LEU 3.0 5.8 - - - -
21D TYR* 2.8 35.8 + - - -
22D VAL* 3.0 20.5 + - + +
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Residues in contact with GLU 19 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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16D LYS 2.9 23.9 - - - +
17D GLY* 3.1 10.4 - - - -
18D CYS* 1.3 76.0 - - + +
20D LEU* 1.3 55.8 + - - +
22D VAL* 3.9 9.6 - - - +
23D GLN* 3.1 28.4 + - - +
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Residues in contact with LEU 20 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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42C LYS* 6.4 0.2 - - - -
17D GLY 3.8 13.0 + - - +
18D CYS 3.0 0.2 + - - -
19D GLU* 1.3 79.0 - - - +
21D TYR* 1.3 58.6 + - - +
22D VAL 3.3 0.4 - - - -
23D GLN* 3.8 6.6 - - + +
24D LEU* 3.0 34.4 + - + +
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Residues in contact with TYR 21 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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38C LEU* 3.9 22.3 - - + +
42C LYS* 3.7 53.6 - - + -
43C PRO* 2.8 33.0 + - - +
46C PRO* 3.1 22.0 - - + +
17D GLY 4.8 0.2 + - - -
18D CYS* 2.8 18.9 + - - +
20D LEU* 1.3 79.0 - - - +
22D VAL* 1.3 65.0 + - + +
24D LEU* 3.9 8.7 - - + -
25D HIS* 2.9 59.7 + + - +
27D ILE* 4.5 9.9 - - + -
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Residues in contact with VAL 22 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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35C ILE* 6.2 4.7 - - + -
38C LEU* 6.3 0.7 - - + -
39C CYS* 5.1 2.2 - - - -
18D CYS* 3.0 33.1 + - + +
19D GLU* 4.2 7.0 - - - +
21D TYR* 1.3 77.0 - - + +
23D GLN* 1.3 67.1 + - - +
26D GLY* 3.0 19.2 + - - -
27D ILE* 3.1 23.6 + - + -
28D GLN* 3.6 42.4 + - + +
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Residues in contact with GLN 23 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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19D GLU 3.1 20.8 + - - +
20D LEU* 3.8 8.7 - - + +
22D VAL* 1.3 80.0 - - - +
24D LEU* 1.3 67.6 + - - +
26D GLY* 3.3 7.4 + - - -
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Residues in contact with LEU 24 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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20D LEU* 3.0 24.1 + - + +
21D TYR* 3.5 12.1 - - + +
23D GLN* 1.3 82.5 - - - +
25D HIS* 1.3 84.2 + - + +
26D GLY* 3.1 2.9 + - - -
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Residues in contact with HIS 25 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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43C PRO 4.4 1.8 - - - -
44C GLU* 3.6 20.2 + - - -
46C PRO* 3.4 30.1 - - + +
47C MSE 4.2 8.5 - - + +
21D TYR* 2.9 45.8 + + + +
24D LEU* 1.3 98.3 - - + +
26D GLY* 1.3 63.0 + - - +
27D ILE* 3.0 26.2 + - + +
30D VAL* 4.5 1.9 - - - +
61D GLU* 5.3 0.4 - - - -
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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