Contacts of the helix formed by residues 172 - 178 (chain B) in PDB entry 1QQG
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 172 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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170B PRO 3.9 0.4 + - - -
171B LYS* 1.3 71.8 - - - +
173B LEU* 1.3 62.5 + - - -
174B GLY 3.0 5.2 + - - -
175B GLN* 3.2 12.0 + - - +
176B THR* 3.3 17.6 + - - +
235B GLU* 4.1 12.3 - - - -
237B TRP* 5.1 1.3 - - - -
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Residues in contact with LEU 173 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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172B GLY* 1.3 70.7 - - - -
174B GLY* 1.3 64.2 + - - +
176B THR* 3.1 16.6 - - + +
177B LYS* 2.9 37.0 + - + +
179B LEU 4.8 0.3 + - - -
225B VAL* 3.9 4.3 - - + -
231B THR* 3.6 29.2 - - - +
232B GLY 4.3 1.3 - - - +
233B PRO 3.6 8.5 - - - +
234B GLY* 3.4 43.7 - - - +
235B GLU 2.9 15.8 + - - +
236B PHE* 3.7 29.4 - - + -
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Residues in contact with GLY 174 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
168B LEU* 5.9 0.9 - - - -
169B LYS 3.4 16.2 - - - -
170B PRO 4.0 1.1 - - - -
171B LYS 2.8 15.1 + - - -
173B LEU* 1.3 76.5 - - - +
175B GLN* 1.3 55.2 + - - +
178B ASN* 2.9 24.4 + - - -
179B LEU 3.0 21.2 + - - -
180B ILE* 3.5 7.4 - - - +
235B GLU 4.3 1.4 + - - -
236B PHE* 4.4 9.1 - - - +
237B TRP 6.1 0.4 - - - -
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Residues in contact with GLN 175 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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170B PRO* 2.8 36.8 + - - +
172B GLY 3.2 4.8 + - - +
174B GLY* 1.3 73.9 - - - +
176B THR* 1.3 66.0 + - + +
178B ASN* 3.4 18.9 + - - +
180B ILE* 3.9 15.9 - - - +
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Residues in contact with THR 176 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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172B GLY 3.3 9.8 + - - +
173B LEU* 3.1 34.2 - - + +
175B GLN* 1.3 78.1 - - + +
177B LYS* 1.3 69.4 + - - +
178B ASN* 5.3 0.4 - - - +
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Residues in contact with LYS 177 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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173B LEU* 2.9 30.3 + - + +
176B THR* 1.3 89.8 - - - +
178B ASN* 1.3 72.9 + - - +
179B LEU* 3.4 24.0 - - + +
230B VAL 4.9 1.8 + - - -
231B THR* 3.3 48.8 + - + +
236B PHE* 4.9 0.4 - - + -
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Residues in contact with ASN 178 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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174B GLY 2.9 11.3 + - - -
175B GLN* 3.4 18.7 + - - +
176B THR 3.5 0.4 - - - -
177B LYS* 1.3 80.9 - - - +
179B LEU* 1.3 62.6 + - - +
180B ILE* 3.5 20.3 + - - +
183B TYR* 4.1 3.5 + - - -
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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