Contacts of the helix formed by residues 619 - 625 (chain B) in PDB entry 1KEK
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 PRO 619 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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519B LEU* 4.1 26.7 - - + -
523B ASP* 5.1 1.6 - - - +
535B ALA* 4.8 0.2 - - - +
617B LYS 4.1 1.5 - - - +
618B TYR* 1.3 95.1 - - + +
620B ASP* 1.3 67.0 + - - +
621B SER* 3.4 16.6 - - - +
622B TRP* 3.0 50.5 + - + +
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Residues in contact with ASP 620 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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535B ALA* 5.4 2.2 - - - -
618B TYR* 3.9 2.8 + - - -
619B PRO* 1.3 71.6 - - - +
621B SER* 1.3 56.6 + - - +
622B TRP 3.0 6.1 + - - -
623B LYS* 3.0 48.4 + - - +
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Residues in contact with SER 621 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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619B PRO* 3.4 22.9 - - - +
620B ASP* 1.3 72.7 - - - +
622B TRP* 1.3 65.7 + - - +
623B LYS* 3.1 0.9 - - - -
624B ASP* 3.3 24.0 + - - +
625B ALA* 3.5 8.1 + - - -
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Residues in contact with TRP 622 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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519B LEU* 4.2 3.4 - - + -
522B MET* 3.8 20.2 - - + -
523B ASP* 2.7 28.9 + - - -
526B LEU* 3.5 29.2 - - + -
531B LYS* 3.6 41.1 - - + +
532B ARG* 3.3 16.5 + - - +
534B ILE* 4.1 19.1 - - + -
535B ALA* 3.8 13.0 - - + -
541B PHE* 4.0 5.2 - + - -
616B PHE* 4.0 18.8 - + - -
618B TYR* 3.5 22.0 - + + -
619B PRO* 3.0 36.4 + - + +
621B SER* 1.3 75.4 - - - +
623B LYS* 1.3 57.8 + - - +
624B ASP 2.9 12.2 + - - -
625B ALA* 3.1 15.7 + - + +
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Residues in contact with LYS 623 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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532B ARG* 3.3 13.5 + - - +
535B ALA* 3.5 29.3 + - + +
536B ASN* 2.7 56.1 + - - +
538B LYS* 5.9 4.6 - - - +
620B ASP* 3.0 36.5 + - - +
622B TRP* 1.3 78.7 - - - +
624B ASP* 1.3 64.1 + - - +
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Residues in contact with ASP 624 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
532B ARG* 4.1 9.7 + - - +
621B SER* 3.3 16.8 - - - +
622B TRP 3.0 0.4 - - - -
623B LYS* 1.3 86.6 - - - +
625B ALA* 1.3 65.4 + - - +
626B PRO* 3.3 6.2 - - - +
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Residues in contact with ALA 625 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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528B SER* 3.8 18.4 - - - -
531B LYS* 4.0 26.9 - - + +
532B ARG* 2.6 38.9 + - - +
621B SER 3.5 5.5 + - - +
622B TRP* 3.1 20.2 + - + +
624B ASP* 1.3 73.4 - - - +
626B PRO* 1.3 66.5 - - + +
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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