Contacts of the helix formed by residues 248 - 252 (chain D) in PDB entry 1QD6
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 SER 248 (chain D).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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97D TRP* 3.5 30.3 - - - -
110D ARG* 4.4 2.8 + - - -
111D GLU* 3.9 8.8 - - - +
113D ASN* 3.3 10.1 - - - -
192D MET* 6.4 0.9 - - - -
246D GLY 4.0 3.2 - - - -
247D GLU* 1.3 78.0 + - - +
249D LEU* 1.3 65.4 + - - +
250D ILE* 3.5 14.4 - - - +
251D ASP* 3.0 31.7 + - - +
252D TYR* 3.0 13.7 + - - +
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Residues in contact with LEU 249 (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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111D GLU* 3.5 7.8 + - - +
113D ASN* 3.0 20.8 + - - +
143D ASP* 3.5 47.1 - - - +
144D SER* 3.5 26.2 - - - +
145D ASN* 3.9 1.6 - - + +
153D ARG* 3.5 28.2 - - + +
154D SER* 4.5 1.6 - - - +
155D TRP* 4.1 16.6 - - + +
185D ASN* 6.1 0.2 - - - -
188D ILE* 4.3 13.9 - - + -
192D MET* 5.3 6.7 - - + -
248D SER* 1.3 73.7 - - - +
250D ILE* 1.3 61.9 + - - +
251D ASP 3.2 0.2 + - - -
252D TYR* 3.1 30.1 + - + +
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Residues in contact with ILE 250 (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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49D ASN* 3.1 17.3 + - - -
52D ALA* 3.6 23.2 - - + +
53D ILE* 3.9 17.5 - - + -
56D TYR* 5.3 1.3 - - - +
110D ARG* 3.8 14.1 - - - +
111D GLU* 3.1 31.6 + - + +
145D ASN* 4.4 2.0 - - - +
151D THR* 3.7 37.5 - - + +
153D ARG* 3.9 27.8 + - + +
248D SER* 3.5 11.7 - - - +
249D LEU* 1.3 76.5 - - - +
251D ASP* 1.3 70.0 + - - +
252D TYR* 3.5 1.0 + - - -
253D ASN* 4.2 6.1 + - - -
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Residues in contact with ASP 251 (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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49D ASN* 2.9 33.6 + - - +
110D ARG* 3.0 24.4 + - - -
246D GLY 3.1 8.3 + - - -
247D GLU* 4.7 0.2 - - - +
248D SER* 3.0 25.6 + - - +
250D ILE* 1.3 84.8 - - - +
252D TYR* 1.3 61.8 + - - +
253D ASN 3.2 3.4 - - - +
254D PHE* 3.1 27.5 - - + +
256D GLN* 2.9 34.5 + - - +
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Residues in contact with TYR 252 (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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153D ARG* 3.8 17.7 - - - -
184D ASP 4.7 0.9 + - - -
185D ASN* 3.5 28.2 - - + -
186D PRO* 4.7 0.9 - - - +
187D ASP* 2.7 29.8 + - - -
188D ILE* 3.6 48.0 - - + -
191D TYR* 3.0 37.1 - + - +
192D MET* 5.0 4.7 - - + -
245D TYR* 3.6 2.9 - - - +
246D GLY* 3.3 24.8 + - - -
248D SER 3.0 4.5 + - - +
249D LEU* 3.1 26.3 + - + +
250D ILE 4.9 0.2 - - - -
251D ASP* 1.3 76.6 - - - +
253D ASN* 1.3 82.5 + - + +
254D PHE 3.4 0.2 - - - -
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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