Contacts of the helix formed by residues 194 - 199 (chain A) in PDB entry 4HH3
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 ALA 194 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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169A THR 5.8 1.3 - - - +
170A GLY 3.7 8.1 - - - +
171A ARG* 3.7 24.4 - - + +
193A ALA* 1.3 71.7 - - - +
195A ILE* 1.3 66.3 + - - +
196A ALA* 3.3 2.9 - - + +
197A GLN* 3.2 48.4 + - + +
198A GLU* 3.7 12.1 + - - +
204A ARG* 6.0 7.4 - - + +
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Residues in contact with ILE 195 (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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163A VAL* 4.3 9.9 - - + -
165A VAL* 3.9 31.2 - - + -
170A GLY 2.9 24.3 + - - +
172A ILE* 4.0 25.1 - - + -
183A LEU* 5.6 2.7 - - + -
193A ALA 3.3 4.3 + - - -
194A ALA* 1.3 71.3 - - - +
196A ALA* 1.3 66.7 + - + +
198A GLU* 3.1 18.5 + - + +
199A PHE* 3.4 37.3 - - + -
204A ARG* 6.3 0.7 - - + -
207A PHE* 3.8 23.3 - - + -
208A MET* 3.9 11.2 - - + -
249A LEU* 5.4 0.2 - - + -
251A CYS* 5.4 5.8 - - - -
253A ILE* 6.2 0.4 - - + -
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Residues in contact with ALA 196 (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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194A ALA* 3.3 2.3 - - + +
195A ILE* 1.3 82.8 - - + +
197A GLN* 1.3 60.9 - - + +
198A GLU 3.1 0.2 - - - -
199A PHE* 3.1 28.2 + - - +
202A ARG* 3.6 10.9 - - - +
203A ARG* 3.4 14.4 - - - +
204A ARG* 3.4 38.6 - - + +
207A PHE* 4.0 18.6 - - + -
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Residues in contact with GLN 197 (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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171A ARG* 6.1 0.4 - - - +
194A ALA* 3.2 33.8 + - + +
195A ILE 3.2 1.0 - - - -
196A ALA* 1.3 80.8 - - + +
198A GLU* 1.3 59.4 + - - +
199A PHE 3.2 4.6 + - - -
202A ARG 5.1 4.3 - - - +
203A ARG* 6.4 0.2 - - - -
204A ARG* 6.1 3.4 - - - +
228A ARG* 2.8 32.7 + - - +
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Residues in contact with GLU 198 (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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172A ILE* 4.5 10.5 - - + -
183A LEU* 4.9 12.1 - - + +
190A LEU* 3.6 18.5 - - + +
193A ALA* 4.0 9.1 - - + +
194A ALA 3.9 11.6 - - - +
195A ILE* 3.1 17.2 + - + +
197A GLN* 1.3 79.4 - - - +
199A PHE* 1.3 74.6 + - + +
227A ALA* 3.4 3.5 - - - +
228A ARG* 2.7 39.6 + - - -
229A ARG* 2.7 51.3 + - - +
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Residues in contact with PHE 199 (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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183A LEU* 3.7 30.5 - - + -
195A ILE* 3.4 43.5 - - + -
196A ALA 3.1 15.2 + - - +
197A GLN* 3.2 2.4 - - - -
198A GLU* 1.3 86.1 - - + +
200A GLU* 1.3 67.5 + - - +
201A GLY 3.3 0.5 + - - -
202A ARG* 3.3 24.8 + - + +
207A PHE* 3.8 28.7 - + - -
225A VAL* 3.5 39.3 - - + -
226A LEU 3.4 7.2 - - - +
227A ALA* 4.2 4.9 - - - -
228A ARG* 4.8 1.8 - - - -
234A LEU* 4.7 2.9 - - + -
236A VAL* 4.5 11.9 - - + -
251A CYS* 6.2 1.8 - - - -
253A ILE* 4.7 7.2 - - + -
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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