Contacts of the strand formed by residues 18 - 24 (chain A) in PDB entry 1K4C
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 VAL 18 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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10A GLU* 3.7 36.3 - - + +
12A VAL* 3.6 24.5 - - + -
17A SER* 1.3 74.1 - - - +
19A LYS* 1.3 62.9 + - - +
20A LEU* 4.1 11.7 - - + -
81A MET 3.7 0.9 - - - +
82A GLN* 3.1 7.2 + - - +
83A LEU* 2.7 48.8 + - + -
86A LEU* 3.9 17.7 - - + -
114A VAL* 4.7 3.8 - - + -
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Residues in contact with LYS 19 (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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10A GLU* 5.4 2.6 - - - -
18A VAL* 1.3 80.3 - - - +
20A LEU* 1.3 64.7 + - - +
21A SER* 4.0 1.7 + - - -
69A THR 5.5 0.4 + - - -
71A THR* 3.6 15.2 + - - +
80A PHE* 3.6 49.1 - - + +
81A MET 3.5 5.2 - - - +
82A GLN* 3.2 34.0 + - - +
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Residues in contact with LEU 20 (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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7A PRO* 5.9 1.3 - - + -
10A GLU* 3.7 30.5 - - + -
18A VAL* 4.1 9.6 - - + -
19A LYS* 1.3 77.0 - - - +
21A SER* 1.3 61.4 + - - +
36A TRP* 4.2 14.8 - - + -
80A PHE* 3.2 8.9 - - - +
81A MET* 2.9 64.4 + - + +
83A LEU* 4.2 7.6 - - + -
94A TYR* 3.7 22.7 - - + -
112A THR* 4.0 15.0 - - + +
114A VAL* 4.0 18.4 - - + -
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Residues in contact with SER 21 (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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5A GLN 4.4 1.1 + - - -
6A GLN* 3.8 9.4 - - - +
7A PRO* 3.4 40.4 - - - +
19A LYS 4.0 1.5 + - - -
20A LEU* 1.3 76.6 - - - +
22A CYS* 1.3 62.4 + - - +
23A LYS 4.2 1.3 + - - -
36A TRP* 4.1 4.7 - - - -
78A THR* 4.2 5.2 - - - -
79A ALA 3.5 4.3 - - - -
80A PHE* 3.9 22.9 - - - -
112A THR* 4.9 0.7 + - - -
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Residues in contact with CYS 22 (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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4A LEU* 3.8 20.4 - - - -
5A GLN 3.5 5.2 - - - -
6A GLN* 4.8 0.2 - - - -
21A SER* 1.3 77.7 - - - +
23A LYS* 1.3 61.1 + - - +
24A ALA* 3.7 4.4 + - - +
34A ILE* 4.6 12.3 - - - -
36A TRP* 3.7 11.0 - - + -
77A SER 4.0 0.3 - - - +
78A THR* 3.4 4.4 - - - -
79A ALA* 2.9 34.8 + - + +
96A CYS* 2.7 47.8 - - + -
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Residues in contact with LYS 23 (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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3A GLN 3.6 0.9 - - - +
4A LEU* 3.4 2.2 - - - -
5A GLN* 2.7 57.3 + - + +
21A SER* 5.3 0.8 - - - -
22A CYS* 1.3 70.3 - - - +
24A ALA* 1.3 62.2 + - - +
25A SER* 5.6 0.2 - - - -
76A SER 5.3 1.6 - - - +
77A SER 3.8 5.4 - - - +
78A THR* 4.1 15.4 - - + +
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Residues in contact with ALA 24 (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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3A GLN 3.0 7.6 - - - +
4A LEU* 4.0 10.3 - - + -
22A CYS* 3.7 3.9 + - - +
23A LYS* 1.3 74.4 - - - +
25A SER* 1.3 61.2 + - - +
28A THR* 5.4 3.6 - - + -
34A ILE* 5.2 9.2 - - + -
76A SER 5.1 0.3 - - - +
77A SER* 3.0 35.2 + - - +
98A ARG* 3.4 22.0 - - - +
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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