Contacts of the helix formed by residues 142 - 147 (chain P) in PDB entry 1KYO
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 THR 142 (chain P).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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134P MET* 4.3 13.4 - - + -
141P GLN* 1.3 74.4 - - - +
143P ASP* 1.3 65.2 + - - +
144P ALA* 2.9 7.8 + - - +
145P ASP* 2.9 44.7 + - - +
146P ARG* 3.4 8.9 + - - +
27U TYR* 5.2 0.7 - - - +
31U SER 4.3 6.3 - - - +
32U GLY* 4.1 28.7 - - - +
33U TYR* 3.9 17.9 - - + -
54U ASN* 5.7 1.1 - - - +
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Residues in contact with ASP 143 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
121P ARG* 2.7 46.4 + - - -
129P ALA* 3.5 25.7 + - - +
130P ASN* 4.7 0.2 + - - -
141P GLN 3.6 1.8 + - - -
142P THR* 1.3 71.5 - - - +
144P ALA* 1.3 56.0 + - - +
146P ARG* 3.1 4.5 + - - +
147P VAL* 2.9 42.3 + - - +
188P SER* 2.9 27.5 + - - +
190P ARG* 4.6 3.6 - - - +
33U TYR* 3.5 9.7 + - - +
102U TYR* 2.9 24.3 + - - +
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Residues in contact with ALA 144 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
142P THR* 2.9 8.8 - - - +
143P ASP* 1.3 75.8 - - - +
145P ASP* 1.3 60.2 + - - +
146P ARG 2.9 5.8 - - - -
147P VAL 2.9 18.6 - - - +
33U TYR* 3.8 17.1 + - + -
101U TYR 3.3 26.0 - - - +
102U TYR* 3.6 18.3 - - + -
103U SER 6.0 0.2 + - - -
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Residues in contact with ASP 145 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
141P GLN* 4.2 25.9 + - - +
142P THR* 2.9 44.0 + - - +
144P ALA* 1.3 75.8 - - - +
146P ARG* 1.3 60.4 + - - +
202P ILE* 4.7 2.4 - - - +
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Residues in contact with ARG 146 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
141P GLN* 3.0 33.1 + - - +
142P THR 3.7 10.8 - - - +
143P ASP* 3.4 7.2 - - - +
144P ALA 2.9 2.2 - - - -
145P ASP* 1.3 83.3 - - - +
147P VAL* 1.3 66.3 + - + +
148P LYS* 5.6 0.7 - - - +
153P LEU* 5.1 1.4 - - + +
154P ILE 5.0 0.9 - - - +
155P MET* 4.0 10.5 - - - -
188P SER* 2.7 38.6 + - - +
189P GLY 3.1 18.2 + - - -
190P ARG* 3.8 16.8 - - - +
199P ASN* 3.3 12.9 - - - +
200P LEU 2.7 30.7 + - - -
202P ILE* 3.1 52.4 - - + +
205P TYR* 3.9 4.7 + - - -
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Residues in contact with VAL 147 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
121P ARG* 3.7 15.5 - - - +
143P ASP* 2.9 39.5 + - - +
144P ALA* 2.9 19.6 - - - +
146P ARG* 1.3 79.2 - - + +
148P LYS* 1.3 63.9 + - - +
149P ASP 4.0 8.7 - - - +
150P PRO* 3.9 6.7 - - + -
152P TRP 3.9 13.9 - - - +
153P LEU* 3.7 31.9 - - + -
154P ILE 4.9 1.8 - - - +
205P TYR* 4.1 3.1 - - - +
102U TYR* 3.5 20.1 - - + +
103U SER* 4.8 1.6 + - - -
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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