Contacts of the strand formed by residues 823 - 826 (chain D) in PDB entry 2QFD
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 823 (chain D).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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808D LEU* 4.9 9.0 - - + -
818D CYS* 4.2 16.6 - - - -
819D TYR 3.7 4.5 - - - +
820D THR* 3.5 32.6 - - + +
821D ALA 3.4 1.4 - - - +
822D ASP* 1.3 77.9 - - - +
824D ARG* 1.3 86.1 + - - +
825D VAL* 5.3 0.7 - - + -
831D TYR* 3.7 33.4 - - + -
832D THR 3.4 12.3 - - - +
833D VAL* 4.8 4.3 - - + -
887D ILE* 5.0 3.1 - - + -
908D TRP* 4.7 3.8 - - + -
913D PHE* 4.0 16.6 - - + -
914D GLU 5.3 1.7 - - - +
916D ILE* 4.4 8.3 + - - +
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Residues in contact with ARG 824 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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821D ALA 3.0 24.8 + - - -
822D ASP* 3.2 10.7 + - - +
823D VAL* 1.3 100.5 + - - +
825D VAL* 1.3 64.6 + - - +
830D HIS 3.5 0.5 - - - +
831D TYR* 3.4 3.5 - - - -
832D THR* 2.8 49.4 + - + +
834D LEU* 3.5 25.7 - - + +
916D ILE* 3.3 45.0 - - - +
917D PRO 3.8 5.8 - - - -
918D PHE* 3.9 16.6 - - + -
922D GLU* 3.2 33.2 + - - +
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Residues in contact with VAL 825 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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823D VAL* 5.3 1.1 - - + -
824D ARG* 1.3 74.7 - - - +
826D ILE* 1.3 62.2 + - - +
827D GLU 3.8 1.9 + - - -
828D GLU* 3.3 41.5 + - - +
829D CYS 3.7 0.7 - - - +
830D HIS 3.2 8.5 - - - +
831D TYR* 3.4 33.7 - - + +
915D LYS* 3.8 25.4 - - + +
916D ILE 2.9 16.6 + - - +
917D PRO* 3.7 5.1 - - + +
918D PHE* 2.9 23.6 + - - +
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Residues in contact with ILE 826 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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825D VAL* 1.3 70.7 - - - +
827D GLU* 1.3 70.9 + - + +
828D GLU 3.3 0.7 - - - -
830D HIS* 2.6 49.6 + - + +
832D THR* 4.0 14.6 - - + -
856D PHE* 5.1 4.9 - - + -
879D TYR* 3.5 49.8 - - + +
884D ILE* 3.8 32.3 - - + -
886D VAL* 5.2 5.8 - - + -
918D PHE* 3.4 28.9 - - + -
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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