Contacts of the helix formed by residues 108 - 112 (chain I) in PDB entry 3HEI
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 GLN 108 (chain I).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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99H HIS* 2.6 52.8 + - + +
100H GLY* 4.4 5.3 - - - -
106I ASN* 3.8 25.8 + - + +
107I PHE* 1.3 83.9 + - - +
109I LYS* 1.3 66.4 + - - +
110I ARG* 3.1 8.3 - - + +
111I LEU* 3.0 24.8 + - + +
112I PHE* 3.5 15.2 - - - -
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Residues in contact with LYS 109 (chain I).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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19I HIS* 3.6 28.7 + - + +
51I ASP* 3.3 37.3 + - - +
53I TRP* 3.6 36.3 - - + +
95I TYR* 5.7 0.2 - - - -
107I PHE* 3.7 24.7 - - + +
108I GLN* 1.3 69.9 - - - +
110I ARG* 1.3 53.1 + - - +
112I PHE* 2.7 39.3 + - - +
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Residues in contact with ARG 110 (chain I).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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53H HIS* 3.7 29.2 + - - -
55H GLU* 4.4 21.2 - - - +
97H ALA 4.6 0.7 - - - -
98H LYS* 2.7 31.1 + - - +
99H HIS 4.1 2.6 + - - -
100H GLY* 3.9 18.9 - - - +
101H PRO* 4.4 4.9 - - - +
108I GLN* 4.7 5.8 - - + +
109I LYS* 1.3 77.5 - - - +
111I LEU* 1.3 63.0 + - + +
112I PHE 3.3 5.4 + - - +
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Residues in contact with LEU 111 (chain I).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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98H LYS* 4.2 30.1 - - + +
99H HIS* 4.2 22.9 - - + +
97I ALA* 3.5 18.0 - - + +
103I TYR* 4.9 20.9 - - + +
108I GLN* 3.0 22.4 + - + +
109I LYS 2.9 0.2 + - - -
110I ARG* 1.3 78.7 - - + +
112I PHE* 1.3 66.5 + - + +
113I THR* 4.1 3.8 + - - -
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Residues in contact with PHE 112 (chain I).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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53I TRP* 4.3 6.5 - + + -
55I ARG* 3.9 17.7 - - + -
95I TYR* 3.7 24.3 - - + -
96I TYR* 3.4 22.0 - - - -
97I ALA* 3.7 20.0 - - + -
107I PHE* 3.7 22.0 - + - -
108I GLN 3.5 19.7 - - - -
109I LYS 2.7 21.9 + - - +
110I ARG 4.1 4.7 - - - +
111I LEU* 1.3 78.1 - - + +
113I THR* 1.3 62.2 + - - +
152I TYR* 3.7 30.5 - + + -
153I LEU 4.2 0.2 - - - -
154I ALA* 3.8 26.7 - - + -
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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