Contacts of the helix formed by residues 184 - 192 (chain C) in PDB entry 3IKM
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 184 (chain C).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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134C LYS* 5.0 8.0 - - - +
182C ARG* 3.7 5.8 - - - +
183C GLU* 1.3 92.9 - - - +
185C LEU* 1.3 63.8 + - - +
186C LEU* 2.7 20.1 - - + +
187C HIS* 2.7 40.9 + - + +
188C GLY 3.8 2.3 + - - -
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Residues in contact with LEU 185 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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127C PRO* 4.3 8.1 - - + +
130C ALA* 4.7 5.9 - - + +
182C ARG* 2.9 42.0 - - - +
183C GLU 4.1 1.2 - - - -
184C ASN* 1.3 73.1 - - - +
186C LEU* 1.3 61.2 + - - +
188C GLY* 3.7 2.1 + - - -
189C ALA* 3.3 18.9 + - - +
210C GLN 4.8 3.1 - - - +
211C ILE 5.1 0.2 - - - -
212C GLY 3.5 7.0 - - - +
214C CYS* 3.0 28.4 - - - -
236C GLU* 3.0 56.7 + - + +
237C ALA 3.9 0.9 - - - +
238C SER* 3.5 21.8 + - - +
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Residues in contact with LEU 186 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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184C ASN* 2.7 19.2 - - + +
185C LEU* 1.3 79.5 - - - +
187C HIS* 1.3 87.8 + - + +
189C ALA* 2.9 24.7 + - - +
190C LEU* 3.1 23.6 - - + +
238C SER* 3.7 5.6 + - - +
240C VAL* 4.1 26.7 - - + -
306C LEU* 5.4 17.7 - - + -
310C GLU* 6.4 2.2 - - + -
335C VAL* 5.8 0.4 - - + -
336C LEU 4.2 13.0 - - - +
338C VAL* 4.4 20.0 - - + -
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Residues in contact with HIS 187 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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134C LYS* 4.2 32.2 + - + +
140C PRO* 5.1 16.8 - - + -
184C ASN* 2.7 36.5 + - + +
186C LEU* 1.3 76.5 - - - +
188C GLY* 1.3 72.2 + - - +
190C LEU* 2.8 37.4 + - - +
191C GLU* 3.7 17.1 + - - -
314C MET* 4.5 16.6 - - + -
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Residues in contact with GLY 188 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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127C PRO* 5.0 1.6 - - - -
184C ASN 3.8 2.0 + - - -
185C LEU 3.7 4.9 + - - -
186C LEU 3.3 0.4 - - - -
187C HIS* 1.3 83.2 - - - +
189C ALA* 1.3 54.2 + - - +
190C LEU 2.5 17.9 + - - -
191C GLU* 2.8 18.9 + - - +
192C HIS* 3.3 15.9 + - - -
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Residues in contact with ALA 189 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
127C PRO* 3.6 37.6 - - + +
185C LEU 3.3 10.1 + - - +
186C LEU* 2.9 13.9 + - - +
188C GLY* 1.3 73.8 - - - +
190C LEU* 1.3 55.5 + - - +
192C HIS* 3.7 5.3 - - - +
193C TYR* 3.2 19.4 + - - +
196C CYS* 4.3 4.2 - - - -
208C LEU* 4.1 7.3 - - - +
238C SER* 4.9 1.1 - - - +
240C VAL* 3.5 26.0 - - + -
242C PHE* 4.4 4.1 - - - -
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Residues in contact with LEU 190 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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186C LEU* 3.1 23.1 - - + +
187C HIS* 2.8 36.1 - - + +
188C GLY 2.5 7.9 + - - -
189C ALA* 1.3 70.5 - - - +
191C GLU* 1.3 57.6 + - - +
192C HIS 3.0 1.6 - - - -
193C TYR* 2.5 36.3 + - - +
240C VAL* 4.2 11.9 - - + -
242C PHE* 3.6 28.7 - - + -
310C GLU* 5.2 12.8 - - + -
311C LEU* 4.5 12.6 - - + -
314C MET* 3.1 27.7 - - + +
315C TYR* 4.7 0.9 + - - -
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Residues in contact with GLU 191 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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187C HIS* 3.7 13.3 + - - -
188C GLY* 2.8 13.6 + - - +
190C LEU* 1.3 75.0 - - - +
192C HIS* 1.3 74.2 + - + +
193C TYR 2.9 1.9 + - - -
194C VAL* 3.7 9.0 + - - +
195C ASN* 4.6 2.9 + - - +
314C MET* 3.1 19.4 - - - +
315C TYR* 2.8 40.3 + - - +
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Residues in contact with HIS 192 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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80B SER* 3.1 29.7 + - - -
97B PRO 5.2 2.7 - - - -
98B GLY* 5.1 3.6 - - - -
99B PHE 2.6 23.0 + - - -
100B GLY* 4.4 1.3 - - - -
101B PRO* 4.7 4.0 - - + +
127C PRO 2.6 28.1 + - - +
128C VAL* 2.8 20.7 - - + +
129C ASP* 3.9 7.9 + - + +
131C LEU* 6.0 1.6 - - + -
188C GLY* 3.3 11.5 + - - +
189C ALA 3.7 9.9 - - - +
190C LEU 3.0 0.2 - - - -
191C GLU* 1.3 88.5 - - + +
193C TYR* 1.3 49.9 + - - +
194C VAL 3.6 0.2 - - - -
195C ASN* 3.2 10.3 + - - +
196C CYS* 2.5 46.1 + - - -
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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