Contacts of the helix formed by residues 168 - 175 (chain X) in PDB entry 3F6E
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 ASP 168 (chain X).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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133X ALA* 4.4 23.2 + - + +
166X ASP 4.0 0.4 + - - -
167X ALA* 1.3 75.1 - - - +
169X PRO* 1.4 72.3 - - - +
170X GLN* 2.8 41.0 + - - +
171X SER* 3.0 30.6 + - - +
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Residues in contact with PRO 169 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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167X ALA 3.4 9.1 - - - +
168X ASP* 1.4 89.6 - - - +
170X GLN* 1.3 62.8 + - + +
171X SER 3.1 3.7 + - - -
172X HIS* 3.0 25.2 + - - +
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Residues in contact with GLN 170 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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168X ASP* 2.8 27.5 + - - +
169X PRO* 1.3 73.8 - - + +
171X SER* 1.3 63.2 + - - +
172X HIS* 3.1 18.3 + - - -
173X HIS* 2.9 49.1 + - + +
174X LEU* 5.3 0.3 - - - +
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Residues in contact with SER 171 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
7X THR* 3.8 23.8 - - - -
133X ALA 4.6 4.2 + - - -
136X PRO* 4.0 12.5 - - - +
137X HIS* 5.1 1.6 + - - +
168X ASP* 3.0 30.7 + - - +
170X GLN* 1.3 72.6 - - - +
172X HIS* 1.3 66.0 + - - +
173X HIS 3.0 2.9 - - - -
174X LEU* 2.9 37.8 + - - +
175X PHE* 4.1 6.9 + - - -
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Residues in contact with HIS 172 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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14X ARG* 5.2 1.0 + - - -
169X PRO 3.0 24.2 + - - +
170X GLN* 3.1 13.6 - - - -
171X SER* 1.3 78.0 - - - +
173X HIS* 1.3 99.4 + + - +
174X LEU 3.0 1.8 + - - -
175X PHE* 3.2 45.0 + - + +
176X ASP 4.7 0.5 + - - -
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Residues in contact with HIS 173 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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170X GLN* 2.9 48.2 + - + +
171X SER 3.0 0.6 + - - -
172X HIS* 1.3 105.3 + + - +
174X LEU* 1.3 62.8 + - + +
175X PHE 3.3 0.4 + - - -
176X ASP 4.6 2.3 + - - -
177X ARG* 3.5 16.7 + - - +
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Residues in contact with LEU 174 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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7X THR* 5.8 0.2 - - + -
11X LEU* 3.5 22.0 - - + +
15X GLN* 3.9 3.1 + - - -
136X PRO* 3.6 20.0 - - + +
137X HIS* 3.6 46.7 - - + +
140X SER* 3.7 22.1 + - - +
144X HIS* 5.2 0.3 + - - -
170X GLN 5.3 0.4 - - - +
171X SER* 2.9 28.3 + - - +
173X HIS* 1.3 82.0 - - + +
175X PHE* 1.3 66.7 + - + +
176X ASP 3.3 1.2 + - - -
177X ARG* 3.5 25.4 + - - +
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Residues in contact with PHE 175 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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7X THR* 3.5 40.8 - - + -
10X GLU* 3.7 20.2 - - + -
11X LEU* 3.7 27.8 - - + -
14X ARG* 3.3 57.7 - - + +
15X GLN* 2.9 18.7 + - - +
171X SER 4.1 8.5 - - - -
172X HIS* 3.2 36.5 + - + +
174X LEU* 1.3 78.0 - - + +
176X ASP* 1.3 60.4 + - - +
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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