Contacts of the helix formed by residues 158 - 161 (chain D) in PDB entry 1PQ3
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 ASN 158 (chain D).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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36D GLY 3.4 13.9 - - - +
37D GLN* 4.0 10.2 - - - +
38D LYS* 3.2 41.9 - - - +
87D VAL* 4.2 7.5 - - - +
154D THR* 4.4 1.2 + - - -
156D SER* 3.2 32.4 + - - +
157D GLY* 1.3 78.8 - - - +
159D LEU* 1.3 63.1 + - - +
160D HIS* 3.4 19.1 + - + -
161D GLY* 3.8 7.4 + - - -
162D GLN* 2.9 15.3 + - - +
554D S2C 4.6 2.1 + - - +
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Residues in contact with LEU 159 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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36D GLY* 3.1 10.0 + - - +
86D ILE* 3.9 8.5 - - + -
87D VAL 3.5 24.7 + - - +
89D PRO* 3.8 15.7 - - + -
92D VAL* 3.7 37.7 - - + -
121D SER* 4.0 7.5 - - - -
124D ILE* 5.5 1.9 - - + +
157D GLY 4.4 0.2 - - - +
158D ASN* 1.3 69.4 - - - +
160D HIS* 1.3 57.6 + - - +
161D GLY 2.9 11.3 + - - -
162D GLN* 2.9 38.9 + - - +
163D PRO* 3.4 8.7 - - - +
166D PHE* 4.0 15.1 - - + -
178D LEU* 3.9 22.9 - - + -
181D PHE* 4.0 6.3 - - + -
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Residues in contact with HIS 160 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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36D GLY 2.8 24.8 + - - +
37D GLN* 3.3 30.2 - - + +
119D ASP* 3.4 21.5 - - + +
120D HIS* 3.9 1.6 - - - +
121D SER* 3.7 15.4 - - - +
147D ASP* 3.4 5.2 - - - +
158D ASN* 3.8 17.9 + - + +
159D LEU* 1.3 70.0 - - - +
161D GLY* 1.3 61.2 + - - +
162D GLN 3.4 1.8 - - - -
163D PRO* 3.5 10.2 - - - +
264D GLY* 6.3 1.6 - - - -
265D THR* 4.7 9.1 + - - -
296D GLU* 3.0 23.3 + - - +
554D S2C 2.9 50.9 + - + +
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Residues in contact with GLY 161 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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147D ASP* 3.2 13.7 - - - -
149D ASN* 3.2 29.7 + - - +
158D ASN 3.8 2.9 + - - -
159D LEU 2.9 1.4 - - - -
160D HIS* 1.3 83.9 - - - +
162D GLN* 1.3 62.3 + - - +
163D PRO* 3.3 3.8 - - - -
205D GLU* 4.3 0.2 - - - +
554D S2C 3.7 30.5 - - - +
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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