Contacts of the helix formed by residues 178 - 182 (chain C) in PDB entry 2AAZ
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 178 (chain C).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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125C PRO* 3.8 17.1 - - + +
129C PHE* 4.2 7.6 - - - -
130C GLN* 3.0 30.6 + - - +
135C GLY* 5.3 1.0 + - - -
136C ALA 4.4 7.7 - - - +
138C TYR* 5.3 1.5 - - - +
175C ASN* 3.0 22.6 + - - -
177C LYS* 1.3 90.0 - - - +
179C LEU* 1.3 64.2 + - - +
180C PRO 3.3 1.8 - - - -
181C LEU* 2.8 34.5 + - - +
182C MET* 3.5 11.9 + - + +
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Residues in contact with LEU 179 (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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174C TRP* 3.8 32.1 - - + -
175C ASN 3.0 25.5 + - - +
176C PRO* 3.8 17.0 - - + +
178C ASP* 1.3 75.8 - - - +
180C PRO* 1.3 71.6 - - + +
182C MET* 2.9 39.9 + - + +
185C PRO* 4.1 20.0 - - + +
186C PRO* 4.1 18.4 - - + -
168D ARG* 5.9 2.9 - - + -
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Residues in contact with PRO 180 (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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113C VAL 5.3 2.4 - - - +
115C LEU* 3.8 15.6 - - - +
176C PRO 4.0 5.4 - - - +
177C LYS 3.5 16.6 - - - +
178C ASP 3.5 1.8 - - - -
179C LEU* 1.3 94.9 - - + +
181C LEU* 1.3 65.5 + - + +
182C MET 3.3 5.0 + - - +
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Residues in contact with LEU 181 (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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115C LEU* 4.3 7.4 - - + -
117C HIS* 5.9 4.5 - - + +
118C ARG* 2.6 42.9 + - - +
124C GLY* 3.5 3.8 - - - -
125C PRO* 3.7 23.3 - - + -
138C TYR* 4.6 19.5 - - + +
177C LYS 5.2 1.3 - - - +
178C ASP* 2.8 31.0 + - - +
180C PRO* 1.3 79.2 - - + +
182C MET* 1.3 58.6 + - - +
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Residues in contact with MET 182 (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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113C VAL* 5.3 1.4 - - - +
115C LEU* 4.0 6.7 - - - +
123C LEU 3.6 4.3 - - - -
125C PRO* 3.6 30.1 - - + +
126C VAL* 3.9 12.1 - - + -
130C GLN* 4.1 4.7 - - - +
173C ALA 4.3 5.4 - - - +
175C ASN* 3.9 8.3 - - + +
178C ASP* 3.7 16.2 - - + +
179C LEU* 2.9 47.2 + - + +
180C PRO 4.2 2.6 - - - +
181C LEU* 1.3 81.2 - - - +
183C ALA* 1.3 66.1 + - - +
184C LEU* 3.2 17.8 + - - +
185C PRO* 4.3 1.9 - - - +
186C PRO* 3.5 31.4 - - + -
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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