Contacts of the helix formed by residues 260 - 269 (chain O) in PDB entry 6FF7


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.
For CSU analysis of other PDB entry

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 ARG 260 (chain O).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    258O  ILE*     3.7     1.5    -      -       +      +
    259O  GLN*     1.3    80.0    -      -       -      +
    261O  ALA*     1.3    63.3    +      -       -      +
    262O  ARG      3.3     2.7    -      -       -      -
    263O  SER*     3.3    13.6    +      -       -      +
    264O  ILE*     3.2    17.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 261 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249O  ALA*     4.5    24.9    -      -       +      +
    252O  GLU*     4.6    11.6    -      -       +      +
    253O  GLU*     5.5     2.5    -      -       +      +
    258O  ILE*     4.4    19.1    -      -       +      +
    259O  GLN      3.8     0.2    -      -       -      -
    260O  ARG*     1.3    76.1    -      -       -      +
    262O  ARG*     1.3    60.5    +      -       -      +
    263O  SER      3.3     0.2    -      -       -      -
    264O  ILE*     3.2     9.8    +      -       -      +
    265O  TYR*     2.9    28.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 262 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259O  GLN      4.9     6.9    -      -       -      +
    260O  ARG*     3.3     2.1    -      -       -      +
    261O  ALA*     1.3    77.8    -      -       -      +
    263O  SER*     1.3    57.0    +      -       -      +
    265O  TYR*     3.4     6.8    +      -       -      +
    266O  GLU*     2.9    28.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 263 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259O  GLN      5.2     2.2    +      -       -      -
    260O  ARG*     3.3    15.8    +      -       -      +
    261O  ALA      3.3     0.4    -      -       -      -
    262O  ARG*     1.3    74.6    -      -       -      +
    264O  ILE*     1.3    59.8    +      -       -      +
    266O  GLU*     3.6     7.9    -      -       -      +
    267O  ARG*     2.9    31.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 264 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245O  TRP*     5.4     3.4    -      -       +      +
    249O  ALA*     4.8    13.7    -      -       +      -
    260O  ARG      3.2    12.2    +      -       -      +
    261O  ALA*     3.2    14.5    +      -       -      +
    263O  SER*     1.3    76.8    -      -       -      +
    265O  TYR*     1.3    57.8    +      -       -      +
    267O  ARG*     3.5     3.2    +      -       -      +
    268O  ALA*     2.9    30.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 265 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249O  ALA*     5.5     4.6    -      -       +      +
    261O  ALA      2.9    15.7    +      -       -      +
    262O  ARG*     3.9     6.5    -      -       -      +
    264O  ILE*     1.3    76.4    -      -       -      +
    266O  GLU*     1.3    61.2    +      -       -      +
    268O  ALA*     3.9     6.7    -      -       -      +
    269O  LEU*     3.3    23.7    +      -       -      +
    278O  LEU      5.8     0.2    -      -       -      +
    282O  TYR*     4.0    26.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 266 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262O  ARG      2.9    18.7    +      -       -      +
    263O  SER*     3.6     9.4    -      -       -      +
    264O  ILE      3.2     0.2    -      -       -      -
    265O  TYR*     1.3    78.6    -      -       -      +
    267O  ARG*     1.3    59.5    +      -       -      +
    269O  LEU*     3.8    10.2    +      -       -      +
    270O  ASP*     4.0     8.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 267 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    263O  SER      2.9    16.4    +      -       -      +
    264O  ILE*     3.8     3.1    -      -       -      +
    266O  GLU*     1.3    73.5    -      -       -      +
    268O  ALA*     1.3    60.9    +      -       -      +
    269O  LEU      3.4     0.9    -      -       -      -
    270O  ASP*     3.8    18.9    +      -       +      +
    271O  VAL*     4.5     4.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 268 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    242O  ILE*     6.2     0.5    -      -       -      +
    245O  TRP*     4.0    25.6    -      -       +      -
    264O  ILE      2.9    18.6    +      -       -      +
    265O  TYR*     3.9     9.2    -      -       -      +
    266O  GLU      3.3     0.4    -      -       -      -
    267O  ARG*     1.3    78.1    -      -       -      +
    269O  LEU*     1.3    60.1    +      -       -      +
    270O  ASP      3.3     1.1    +      -       -      -
    271O  VAL*     3.9    10.0    +      -       -      +
    272O  ASP*     3.9     9.7    +      -       -      +
    278O  LEU*     5.8     8.5    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 269 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265O  TYR      3.3    15.4    +      -       -      +
    266O  GLU*     3.8     6.2    +      -       -      +
    267O  ARG      3.4     0.2    -      -       -      -
    268O  ALA*     1.3    75.0    -      -       -      +
    270O  ASP*     1.3    62.9    +      -       -      +
    271O  VAL      3.3     1.6    -      -       -      -
    272O  ASP      3.2    26.8    -      -       -      +
    273O  TYR*     3.3    20.1    +      -       +      +
    278O  LEU*     5.9     6.3    -      -       +      -
----------------------------------------------------------
 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