Contacts of the helix formed by residues 129 - 132 (chain A) in PDB entry 1KYH
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 129 (chain A).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
102A GLY 3.4 14.1 - - - +
103A PRO* 4.0 8.7 - - + -
104A GLY 4.4 3.8 - - - +
105A LEU 5.2 0.7 - - - +
107A GLN* 5.3 0.4 - - - -
128A ASP* 1.3 85.9 + - - +
130A GLY* 1.3 62.7 + - - +
132A LEU* 3.0 20.1 + - - +
152A GLU* 3.3 17.9 + - - +
155A ARG* 2.9 24.3 + - - -
216A ASP* 5.2 2.9 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with GLY 130 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
102A GLY* 3.3 6.2 + - - -
105A LEU 3.2 24.5 + - - -
106A PRO 3.6 12.4 - - - +
107A GLN* 3.7 25.9 - - - +
108A THR 4.7 0.3 + - - -
111A VAL* 3.9 8.5 - - - +
112A GLN* 4.2 3.6 - - - +
128A ASP 3.1 0.4 + - - -
129A ALA* 1.3 80.2 - - - +
131A ALA* 1.3 57.6 + - - +
132A LEU 3.2 4.6 + - - +
133A ALA* 5.7 0.3 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 131 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
101A ILE* 3.4 31.0 - - + +
102A GLY* 3.7 7.3 - - - -
111A VAL* 3.9 12.8 - - + -
112A GLN* 3.0 19.7 + - - +
115A VAL* 4.0 18.8 - - + +
127A LEU* 4.3 16.4 - - + +
128A ASP 2.9 9.1 + - - +
130A GLY* 1.3 75.0 - - - +
132A LEU* 1.3 60.7 + - - +
133A ALA 3.6 1.4 + - - -
135A ARG* 5.3 0.9 - - - -
137A TYR* 5.5 0.2 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 132 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
107A GLN* 5.2 1.0 - - - +
127A LEU* 3.4 30.5 - - + +
128A ASP* 3.8 10.1 - - - -
129A ALA 3.0 18.2 + - - +
130A GLY 4.2 3.1 - - - +
131A ALA* 1.3 77.2 - - - +
133A ALA* 1.3 64.0 + - - +
137A TYR* 5.2 1.6 - - - +
146A LEU* 3.9 22.4 - - + -
147A THR 3.9 3.8 - - - -
148A PRO* 3.6 38.6 - - + -
152A GLU* 3.8 15.7 - - + +
155A ARG* 2.9 33.4 + - - +
156A MSE 4.3 15.3 - - + -
----------------------------------------------------------
Back to top of page
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
------------------------------------------------------------
Atomic class I II III IV V VI VII VIII
------------------------------------------------------------
I (Hydrophilic) + + + - + + + +
II (Acceptor) + - + - + + + -
III (Donor) + + - - + + - +
IV (Hydrophobic) - - - + + + + +
V (Aromatic) + + + + + + + +
VI (Neutral) + + + + + + + +
VII (Neutral-donor) + + - + + + - +
VIII (Neutral-acceptor) + - + + + + + -
------------------------------------------------------------
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