Contacts of the helix formed by residues 169 - 174 (chain C) in PDB entry 2ZHX
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 GLY 169 (chain C).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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67C GLN* 5.9 1.3 - - - -
167C LEU 3.7 4.7 - - - +
168C TRP* 1.3 75.9 - - - +
170C ARG* 1.3 66.5 + - - -
171C ASP* 3.5 2.5 - - - -
172C ALA* 3.7 5.6 - - - +
173C SER* 3.3 14.1 + - - -
189C SER 2.9 16.1 + - - +
190C PRO* 4.5 0.9 - - - -
191C HIS* 3.3 26.9 - - - +
24D MET* 5.5 0.2 - - - -
28D GLU* 4.0 6.3 - - - -
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Residues in contact with ARG 170 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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169C GLY* 1.3 70.6 - - - -
171C ASP* 1.3 67.5 + - - +
172C ALA 3.0 2.2 - - - -
173C SER* 2.8 37.3 + - - -
174C THR* 3.5 10.7 + - - +
188C GLU* 5.6 0.4 - - - -
25D LEU* 4.1 24.7 - - + +
27D GLU* 2.7 30.9 + - - -
28D GLU* 3.3 37.7 + - + +
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Residues in contact with ASP 171 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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65C VAL* 5.4 0.5 - - - +
66C GLY 4.8 1.0 - - - +
67C GLN* 3.7 38.0 - - - +
128C ARG* 3.9 33.1 + - - +
141C ARG* 5.2 6.4 + - - -
169C GLY* 5.2 0.7 - - - -
170C ARG* 1.3 76.8 - - - +
172C ALA* 1.3 59.3 + - - +
174C THR* 2.6 33.8 + - - +
175C LEU* 4.5 1.0 - - - +
23D LEU* 4.4 20.4 - - + +
25D LEU* 5.0 10.7 - - + +
28D GLU* 4.8 1.8 + - - -
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Residues in contact with ALA 172 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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65C VAL* 4.4 22.7 - - + +
128C ARG* 5.7 0.2 - - - +
167C LEU* 3.7 33.0 - - + +
168C TRP 3.8 15.0 + - - +
169C GLY 3.7 9.6 + - - +
170C ARG 3.0 0.4 - - - -
171C ASP* 1.3 86.1 + - - +
173C SER* 1.3 56.3 + - - +
175C LEU* 2.8 33.6 + - - +
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Residues in contact with SER 173 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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167C LEU* 3.9 10.8 + - - -
169C GLY 3.3 14.0 + - - -
170C ARG* 2.8 35.7 + - - -
172C ALA* 1.3 67.3 - - - +
174C THR* 1.3 54.1 + - - +
175C LEU 2.8 5.8 - - - -
176C LYS* 2.8 32.9 + - - +
177C PRO* 3.9 2.8 - - - +
188C GLU* 3.0 34.0 + - - +
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Residues in contact with THR 174 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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128C ARG* 3.8 10.1 + - - +
170C ARG 3.7 8.5 - - - +
171C ASP* 2.6 27.0 + - - +
173C SER* 1.3 76.0 - - - +
175C LEU* 1.3 70.4 + - - +
176C LYS 3.4 0.2 - - - -
177C PRO* 3.5 18.9 - - - +
178C MET* 4.5 5.5 - - - +
25D LEU* 6.0 5.6 - - + -
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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