Contacts of the helix formed by residues 237 - 247 (chain A) in PDB entry 1CQ7
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 ALA 237 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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87A LEU 3.7 20.4 - - - +
223A PHE* 3.8 15.0 - - + -
226A GLN* 3.9 19.5 - - - +
233A LEU 3.7 0.8 + - - +
234A GLU 3.2 9.7 + - - +
235A GLU 3.1 1.2 - - - -
236A ASP* 1.3 78.7 - - - +
238A GLU* 1.3 62.7 + - - +
239A GLY 3.3 3.1 + - - -
240A LEU* 3.4 3.9 + - + +
241A ARG* 2.9 37.6 + - - +
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Residues in contact with GLU 238 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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202A LEU* 4.1 38.3 - - + +
205A TRP* 5.8 1.1 - - + -
230A ARG* 5.3 4.0 + - - -
234A GLU 3.6 4.6 + - - +
235A GLU* 3.0 39.5 + - - +
236A ASP 3.4 0.6 - - - -
237A ALA* 1.3 77.2 - - - +
239A GLY* 1.3 63.7 + - - +
241A ARG* 3.4 9.4 + - - +
242A ALA* 3.0 22.9 + - - +
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Residues in contact with GLY 239 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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190A GLY 5.5 0.8 + - - -
202A LEU* 5.0 0.2 - - - -
205A TRP* 3.5 44.0 - - - +
221A PHE* 4.3 6.3 - - - -
236A ASP 4.8 2.4 + - - -
237A ALA 3.3 0.8 - - - -
238A GLU* 1.3 75.3 - - - +
240A LEU* 1.3 65.6 + - - +
242A ALA* 3.0 13.9 + - - +
243A PHE* 3.1 18.2 + - - -
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Residues in contact with LEU 240 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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87A LEU* 3.9 41.5 - - + +
88A PHE* 4.3 12.8 - - + -
190A GLY 5.6 1.2 + - - -
221A PHE* 3.8 43.1 - - + -
223A PHE* 4.1 24.7 - - + -
236A ASP 5.5 0.4 + - - -
237A ALA* 3.4 6.5 + - - +
239A GLY* 1.3 73.6 - - - +
241A ARG* 1.3 59.6 + - - +
243A PHE* 3.0 5.9 + - - +
244A ALA* 2.8 24.9 + - - +
250A LEU* 3.6 28.5 - - + -
252A VAL* 4.6 9.4 - - + -
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Residues in contact with ARG 241 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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86A LEU 3.0 27.3 + - - -
87A LEU 3.1 18.6 + - - +
88A PHE* 3.5 19.6 - - + +
89A GLY* 3.4 17.2 - - - +
234A GLU* 3.1 56.0 + - - +
237A ALA* 2.9 27.0 + - - +
238A GLU* 3.7 8.2 - - - +
240A LEU* 1.3 75.7 - - - +
242A ALA* 1.3 61.2 + - - +
244A ALA* 3.9 7.3 - - - +
245A ALA* 3.2 23.7 + - - +
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Residues in contact with ALA 242 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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202A LEU* 4.7 7.2 - - + -
205A TRP 4.9 3.8 - - - +
206A GLN* 4.2 31.8 - - + +
209A ALA* 4.2 4.0 - - - +
238A GLU 3.0 13.4 + - - +
239A GLY* 3.0 12.7 + - - +
241A ARG* 1.3 76.5 - - - +
243A PHE* 1.3 63.1 + - - +
245A ALA* 3.6 10.9 + - - +
246A MET* 3.7 17.7 - - - +
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Residues in contact with PHE 243 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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188A PHE* 3.8 31.6 - + - -
205A TRP* 3.4 37.9 - + - -
208A LEU* 3.7 25.4 - - + -
209A ALA* 3.7 11.0 - - + -
212A SER* 4.0 11.9 - - - -
219A PRO* 3.7 22.9 - - + -
221A PHE* 3.8 15.3 - + + -
239A GLY 3.1 16.3 + - - +
240A LEU 3.0 9.0 + - - +
242A ALA* 1.3 78.0 - - - +
244A ALA* 1.3 57.6 + - - +
246A MET 3.0 3.6 + - - -
247A HIS* 2.8 53.4 + - + +
250A LEU* 5.0 6.1 - - + -
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Residues in contact with ALA 244 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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88A PHE* 4.2 13.2 - - + -
94A LEU* 3.6 39.2 - - + +
99A ARG* 4.5 4.0 + - - -
240A LEU 2.8 14.6 + - - +
241A ARG* 3.9 8.7 - - - +
242A ALA 3.4 0.2 - - - -
243A PHE* 1.3 76.0 - - - +
245A ALA* 1.3 60.7 + - - +
246A MET 3.3 0.2 - - - -
247A HIS 3.7 11.9 - - - +
250A LEU* 4.1 17.9 - - + +
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Residues in contact with ALA 245 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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241A ARG 3.2 16.3 + - - +
242A ALA* 3.7 8.7 - - - +
243A PHE 3.1 1.0 - - - -
244A ALA* 1.3 77.8 - - - +
246A MET* 1.3 64.4 + - + +
247A HIS 4.9 0.2 - - - -
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Residues in contact with MET 246 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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206A GLN 5.2 0.4 - - - +
209A ALA* 4.2 18.6 - - + -
210A GLN* 3.4 40.6 - - - +
213A VAL* 4.0 31.9 - - + +
242A ALA 3.7 12.8 + - - +
243A PHE 3.0 6.1 + - - +
245A ALA* 1.3 85.8 - - + +
247A HIS* 1.3 64.7 + - + +
248A LYS* 4.0 3.6 + - - +
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Residues in contact with HIS 247 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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99A ARG* 3.1 14.9 + - - -
209A ALA* 3.6 4.3 + - - -
212A SER* 2.9 41.3 + - - -
213A VAL* 3.4 26.6 - - + +
217A TRP 4.1 4.9 + - - -
219A PRO* 3.3 25.0 - - + +
243A PHE* 2.8 49.1 + + + +
244A ALA 3.7 10.9 - - - +
245A ALA 4.9 0.7 - - - +
246A MET* 1.3 77.3 - - + +
248A LYS* 1.3 62.0 + - - +
249A GLU 3.7 14.3 + - - +
250A LEU* 4.2 11.5 - - + +
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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