Contacts of the helix formed by residues 237 - 243 (chain B) in PDB entry 1Q57
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 237 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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84B ARG* 5.6 1.4 + - - -
161B ASP* 3.2 24.3 - - - +
206B PHE 5.2 1.8 - - - -
207B ASP* 3.6 17.5 - - - +
233B LEU* 3.8 9.6 - - - -
235B CYS 4.0 1.3 - - - -
236B LYS* 1.3 99.6 - - - +
238B ALA* 1.3 66.7 + - - +
239B ASN* 3.1 8.9 + - - +
240B GLU* 3.0 42.0 + - - +
241B CYS* 3.3 15.1 + - - -
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Residues in contact with ALA 238 (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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156B THR* 5.5 0.9 - - + -
161B ASP* 2.9 25.0 + - + +
164B THR* 3.5 6.9 - - + +
165B VAL* 4.7 2.7 - - + -
205B MET* 3.5 34.0 + - + +
233B LEU* 3.4 17.3 - - + +
237B ASP* 1.3 71.3 - - - +
239B ASN* 1.3 57.8 + - - +
241B CYS* 3.5 0.8 - - - +
242B HIS 3.4 6.4 + - - -
250B ILE* 2.9 34.9 - - + +
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Residues in contact with ASN 239 (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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84B ARG* 3.2 51.9 + - - +
86B ILE* 4.6 1.2 - - - +
160B ILE* 3.7 17.2 - - + +
161B ASP* 2.6 21.7 + - - +
164B THR* 3.1 25.9 + - - +
237B ASP* 3.7 5.3 - - - +
238B ALA* 1.3 71.2 - - - +
240B GLU* 1.3 62.5 + - - +
241B CYS 3.0 1.7 + - - -
242B HIS* 4.7 1.0 - - - +
243B LEU* 2.8 45.3 + - - +
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Residues in contact with GLU 240 (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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235B CYS* 3.2 31.6 - - + +
236B LYS* 3.5 24.4 + - - +
237B ASP* 3.0 26.4 + - - +
239B ASN* 1.3 76.3 + - - +
241B CYS* 1.3 60.5 + - - +
243B LEU* 3.1 21.8 - - - +
244B ASN 4.5 1.6 - - - +
245B GLY* 5.3 0.2 - - - -
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Residues in contact with CYS 241 (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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233B LEU* 3.4 38.8 - - - -
234B PRO* 3.8 13.9 - - - -
235B CYS* 3.8 18.2 - - - -
237B ASP 3.5 11.9 - - - -
238B ALA 3.5 8.3 - - - +
239B ASN 3.0 0.2 - - - -
240B GLU* 1.3 75.7 - - - +
242B HIS* 1.3 66.0 + - - +
245B GLY* 3.2 22.3 + - - -
246B HIS* 3.2 20.4 + - - +
250B ILE* 3.5 13.5 - - + -
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Residues in contact with HIS 242 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
84B ARG 3.5 15.5 - - - -
85B GLY* 2.7 35.6 + - - -
86B ILE* 5.0 1.8 - - + -
164B THR* 3.7 30.5 - - + -
167B GLU* 4.7 4.9 + - + +
168B LEU* 3.9 10.7 - - + +
238B ALA 3.4 2.0 + - - +
239B ASN* 3.1 8.2 + - - +
241B CYS* 1.3 80.2 - - - +
243B LEU* 1.3 50.5 + - + +
244B ASN* 2.6 23.0 + - - -
245B GLY 3.9 0.9 + - - -
247B ASP* 2.7 45.7 + - - +
250B ILE* 3.9 1.7 - - + +
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Residues in contact with LEU 243 (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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83B ALA 3.6 16.6 - - - +
84B ARG* 3.3 43.5 - - - +
85B GLY* 4.0 3.1 - - - +
239B ASN* 2.8 33.2 + - - +
240B GLU* 3.1 17.3 - - - +
242B HIS* 1.3 67.9 - - + +
244B ASN* 1.3 73.2 + - - +
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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