Contacts of the strand formed by residues 101 - 105 (chain A) in PDB entry 1ITB


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 PHE 101 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57A  PRO*     3.4     1.4    -      -       -      +
     58A  VAL*     2.7    48.8    +      -       +      +
     60A  LEU*     4.5    13.7    -      -       +      -
     69A  LEU*     3.4    35.0    -      -       +      -
     71A  CYS*     3.4    33.7    -      -       -      -
     80A  LEU*     4.1    13.5    -      -       +      -
     98A  ARG      4.4     0.2    -      -       -      -
     99A  PHE      3.5    16.6    -      -       -      -
    100A  VAL*     1.3    73.2    -      -       -      +
    102A  ASN*     1.3    62.1    +      -       -      +
    112A  PHE*     4.1    16.8    -      -       +      -
    113A  GLU      3.0    15.7    -      -       -      +
    114A  SER*     4.1     6.7    -      -       -      -
    122A  ILE*     3.7    33.2    -      -       +      -
    134A  LEU*     4.0     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 102 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50A  GLU*     5.0     8.1    +      -       -      +
     55A  LYS*     4.0    34.2    -      -       +      +
     56A  ILE      3.8     4.5    -      -       -      +
     57A  PRO*     4.0    18.5    -      -       -      +
    100A  VAL*     4.8     0.2    -      -       -      +
    101A  PHE*     1.3    74.2    -      -       -      +
    103A  LYS*     1.3    59.5    +      -       -      +
    104A  ILE*     3.2    10.7    +      -       +      +
    111A  GLU      3.5     1.6    -      -       -      +
    112A  PHE*     3.6     1.5    -      -       -      -
    113A  GLU*     2.8    51.7    +      -       +      +
    114A  SER      4.8     0.2    +      -       -      -
    115A  ALA*     4.1    27.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 103 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44A  MET*     3.7    35.2    -      -       +      -
     46A  PHE*     4.5    11.4    -      -       -      -
     54A  ASP      4.7     0.3    -      -       -      +
     55A  LYS*     4.0     1.6    -      -       -      -
     56A  ILE*     2.8    48.9    +      -       -      +
     58A  VAL*     4.0    13.9    -      -       +      -
    101A  PHE      3.6     1.8    +      -       -      -
    102A  ASN*     1.3    68.6    -      -       -      +
    104A  ILE*     1.3    60.4    +      -       -      +
    105A  GLU*     4.0     3.1    +      -       -      -
    110A  LEU*     3.9    21.8    -      -       +      +
    111A  GLU      3.7     5.6    -      -       -      +
    112A  PHE*     3.9    17.5    -      -       +      -
    148A  MET*     4.3    12.3    -      -       +      -
    238B  SER      5.9     0.2    +      -       -      -
    300B  THR*     3.9    26.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 104 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54A  ASP*     4.2    11.7    -      -       -      +
     55A  LYS*     4.2    24.5    -      -       +      -
    102A  ASN*     3.7    13.0    -      -       +      +
    103A  LYS*     1.3    73.6    -      -       -      +
    105A  GLU*     1.3    61.6    +      -       -      +
    106A  ILE*     3.8    25.4    -      -       +      -
    109A  LYS      3.5     1.9    -      -       -      +
    110A  LEU*     3.4     5.6    -      -       -      -
    111A  GLU*     3.0    47.9    +      -       +      +
    113A  GLU*     4.2    26.7    -      -       +      +
    121A  TYR*     4.4    13.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 105 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54A  ASP      4.8     3.0    +      -       -      -
    103A  LYS*     4.0     3.9    +      -       -      +
    104A  ILE*     1.3    73.7    -      -       -      +
    106A  ILE*     1.3    69.0    +      -       -      +
    108A  ASN*     3.2    43.5    +      -       -      +
    109A  LYS      3.8     4.5    -      -       -      +
    110A  LEU*     3.5    23.1    -      -       +      +
    204B  ASN*     4.9     0.5    +      -       -      -
    300B  THR*     3.3    48.6    +      -       +      +
    301B  HIS*     4.0    12.5    +      -       +      +
----------------------------------------------------------
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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
------------------------------------------------------------
  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