Contacts of the helix formed by residues 52 - 56 (chain F) in PDB entry 1KR2
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 GLY 52 (chain F).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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50F PRO 3.8 0.8 + - - -
51F VAL* 1.3 81.7 - - - +
53F ASP* 1.3 63.5 + - - -
54F ALA* 3.0 7.8 + - - -
55F TYR* 3.0 21.5 + - - +
60F LEU* 4.1 0.9 - - - +
63F ALA* 4.9 0.7 - - - -
66F ARG* 4.2 1.6 - - - -
86F GLU* 3.8 10.9 + - - +
87F SER* 3.7 23.8 - - - -
89F GLN 4.7 5.6 - - - -
92F TRP* 5.0 3.2 - - - -
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Residues in contact with ASP 53 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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52F GLY* 1.3 71.1 - - - -
54F ALA* 1.3 60.0 + - - +
55F TYR 3.0 2.5 + - - -
56F LYS* 3.1 23.7 + - - +
60F LEU* 4.2 10.5 - - + +
61F ILE 3.2 8.6 - - - +
62F PRO* 3.8 8.1 - - - +
63F ALA* 2.8 28.6 + - - +
66F ARG* 2.8 27.2 + - - +
87F SER 4.7 1.6 + - - -
89F GLN 5.4 0.4 + - - -
261F ARG* 5.1 8.2 + - - +
262F ASN* 5.0 1.9 + - - -
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Residues in contact with ALA 54 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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52F GLY 3.0 2.5 + - - +
53F ASP* 1.3 77.8 - - - +
55F TYR* 1.3 62.8 + - - +
56F LYS* 3.1 19.5 + - - +
89F GLN 4.6 4.0 + - - +
90F LYS* 3.7 26.7 - - - +
91F GLU* 4.4 2.2 - - - +
92F TRP* 3.8 22.6 - - + +
268F ALA* 3.5 10.4 - - - +
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Residues in contact with TYR 55 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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16F SER* 4.1 11.7 - - - -
51F VAL* 3.8 20.0 - - + -
52F GLY 3.0 16.2 + - - +
53F ASP 3.0 0.4 - - - -
54F ALA* 1.3 79.7 - - - +
56F LYS* 1.3 61.0 + - - +
57F LYS* 3.4 33.5 + - + +
60F LEU* 4.4 3.8 - - + -
92F TRP* 3.4 26.6 - + + +
168F LEU* 6.0 0.2 - - - +
267F LEU* 3.6 21.4 - - + +
268F ALA* 2.9 30.3 + - - +
269F PRO* 3.5 30.3 - - + -
814F TAD 3.7 51.7 + - - -
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Residues in contact with LYS 56 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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53F ASP 3.1 15.9 + - - +
54F ALA* 3.1 18.5 - - - +
55F TYR* 1.3 78.0 - - - +
57F LYS* 1.3 63.6 + - - +
58F LYS 3.6 1.0 + - - -
60F LEU* 4.6 1.0 - - - +
262F ASN* 3.4 39.9 + - - +
265F VAL* 3.9 36.6 - - + +
266F ILE 3.9 7.6 - - - +
267F LEU* 4.3 3.7 - - - +
268F ALA* 4.5 1.8 - - + +
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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