Contacts of the helix formed by residues 177 - 191 (chain A) in PDB entry 1KCX
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 177 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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175A GLN* 4.3 2.0 + - - +
176A MET* 1.3 75.1 - - - +
178A ASP* 1.3 59.5 + - - +
179A SER* 3.5 9.2 + - - -
180A GLN* 2.9 32.6 + - - +
181A LEU* 2.9 26.7 + - - +
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Residues in contact with ASP 178 (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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177A SER* 1.3 73.3 - - - +
179A SER* 1.3 57.5 + - - +
181A LEU* 3.4 14.0 + - - +
182A TYR* 3.0 28.4 + - - +
238A ARG* 2.9 49.0 + - - +
242A ILE* 4.3 9.3 - - + +
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Residues in contact with SER 179 (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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177A SER* 3.2 8.3 + - - -
178A ASP* 1.3 79.0 - - - +
180A GLN* 1.3 63.3 + - - +
182A TYR* 3.5 7.5 + - - +
183A GLU* 3.2 23.7 + - - +
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Residues in contact with GLN 180 (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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144A TRP* 3.8 37.8 + - + +
175A GLN 4.5 2.6 - - - +
176A MET* 3.4 26.2 - - + +
177A SER* 2.9 31.6 + - - +
179A SER* 1.3 75.3 - - - +
181A LEU* 1.3 61.0 + - - +
183A GLU* 3.2 9.4 + - - +
184A ALA* 2.8 31.2 + - - +
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Residues in contact with LEU 181 (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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166A VAL* 3.8 27.6 - - + -
167A TYR 4.3 4.5 - - - +
168A MET* 3.9 31.9 - - + -
176A MET* 3.6 33.2 - - + +
177A SER 2.9 15.0 + - - +
178A ASP* 3.6 25.4 - - - +
180A GLN* 1.3 75.8 - - - +
182A TYR* 1.3 57.9 + - - +
184A ALA* 3.8 1.3 - - - +
185A PHE* 2.9 46.6 + - + -
238A ARG* 5.0 1.1 - - - +
239A ALA* 6.0 0.4 - - - -
242A ILE* 3.9 19.1 - - + -
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Residues in contact with TYR 182 (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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178A ASP 3.0 17.7 + - - +
179A SER* 3.6 8.3 - - - +
180A GLN 3.2 0.2 - - - -
181A LEU* 1.3 78.4 - - - +
183A GLU* 1.3 61.5 + - + +
186A THR* 2.8 45.5 + - + -
242A ILE* 4.1 12.3 - - + +
245A ARG* 5.1 10.5 - - + -
246A ILE* 3.5 32.0 - - + +
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Residues in contact with GLU 183 (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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144A TRP* 3.1 32.6 + - - +
149A ARG* 3.3 27.5 + - - +
179A SER 3.2 13.3 + - - +
180A GLN* 3.5 12.3 - - - +
182A TYR* 1.3 85.5 - - + +
184A ALA* 1.3 57.2 + - - +
186A THR* 3.4 6.3 + - - -
187A PHE* 2.9 30.3 + - - +
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Residues in contact with ALA 184 (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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144A TRP* 3.9 32.0 - - + -
166A VAL* 4.4 12.8 - - + -
176A MET* 4.1 15.3 - - - -
180A GLN 2.8 17.0 + - - +
181A LEU* 3.8 4.0 - - - +
183A GLU* 1.3 75.3 - - - +
185A PHE* 1.3 58.4 + - + +
187A PHE* 3.3 0.5 + - - +
188A LEU* 2.8 44.2 + - + +
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Residues in contact with PHE 185 (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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166A VAL* 3.9 20.6 - - + -
181A LEU* 2.9 41.6 + - + +
184A ALA* 1.3 76.4 - - + +
186A THR* 1.3 58.0 + - - +
188A LEU* 5.0 0.4 - - + -
189A LYS* 2.9 33.0 + - - +
195A ILE* 3.7 30.9 - - + +
197A VAL* 3.9 21.5 - - + -
239A ALA* 3.7 29.2 - - + -
242A ILE* 3.7 20.0 - - + -
243A ALA 4.1 3.4 - - - -
246A ILE* 3.6 16.2 - - + -
248A CYS* 4.0 21.7 - - - -
250A VAL* 4.0 12.3 - - + -
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Residues in contact with THR 186 (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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182A TYR* 2.8 36.2 + - + -
183A GLU* 3.5 6.3 - - - -
185A PHE* 1.3 78.4 - - - +
187A PHE* 1.3 62.9 + - - +
189A LYS* 3.7 4.5 - - + +
190A GLY* 3.2 17.7 + - - -
246A ILE* 3.6 25.6 - - + +
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Residues in contact with PHE 187 (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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144A TRP* 4.3 7.6 - + + -
149A ARG* 3.3 81.9 - - + +
152A LEU* 3.9 19.5 - - + -
153A GLU* 3.7 23.3 - - + -
183A GLU 2.9 17.1 + - - +
184A ALA 3.9 2.9 - - - +
186A THR* 1.3 77.8 - - - +
188A LEU* 1.3 65.0 + - - +
190A GLY* 3.2 11.7 + - - -
191A LEU* 3.2 36.1 + - + +
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Residues in contact with LEU 188 (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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141A ILE* 4.3 17.0 - - + -
144A TRP* 5.2 0.2 - - + -
152A LEU* 4.3 23.8 - - + -
164A PHE* 4.0 35.7 - - + +
166A VAL* 4.8 6.5 - - + -
184A ALA* 2.8 34.4 + - + +
185A PHE* 5.6 0.2 - - + -
187A PHE* 1.3 69.0 - - + +
189A LYS* 1.3 66.2 + - - +
191A LEU* 3.0 22.1 + - + +
192A GLY 3.1 8.3 + - - -
193A ALA* 3.2 17.9 + - + -
194A VAL 5.8 0.2 - - - +
195A ILE* 3.8 36.6 - - + -
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Residues in contact with LYS 189 (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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185A PHE 2.9 19.0 + - - +
186A THR* 3.7 5.6 - - + +
188A LEU* 1.3 75.0 - - - +
190A GLY* 1.3 60.5 + - - +
192A GLY* 2.8 21.1 + - - -
195A ILE* 4.2 3.2 - - - +
246A ILE* 2.9 28.5 + - + +
247A ASN* 3.0 32.8 + - - +
248A CYS* 3.7 19.3 - - + -
474A PHE* 4.3 3.3 - - - -
479A TYR* 3.6 26.4 + - + +
482A VAL* 4.2 10.5 - - - -
486A SER* 3.8 8.0 + - - -
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Residues in contact with GLY 190 (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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186A THR 3.2 7.9 + - - -
187A PHE* 3.2 9.5 + - - -
189A LYS* 1.3 82.6 - - - +
191A LEU* 1.3 61.3 + - - +
192A GLY 3.5 0.2 + - - -
474A PHE* 3.6 12.5 - - - -
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Residues in contact with LEU 191 (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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152A LEU* 3.9 19.7 - - + +
153A GLU* 4.2 24.0 - - + +
156A VAL* 3.9 34.2 - - + +
187A PHE* 3.2 40.1 + - + +
188A LEU* 3.0 17.0 + - + +
190A GLY* 1.3 77.7 - - - +
192A GLY* 1.3 61.6 + - - +
193A ALA* 3.5 2.4 + - + +
473A PRO* 3.3 18.4 - - - +
474A PHE* 3.7 8.1 - - - -
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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