Contacts of the strand formed by residues 221 - 225 (chain C) in PDB entry 4X4R


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 ASP 221 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120C  PRO      3.8    12.1    -      -       -      +
    121C  LYS*     3.6    23.2    -      -       -      +
    123C  ILE*     5.0     2.3    -      -       -      +
    129C  ARG*     3.5    36.3    +      -       -      +
    218C  ASP*     2.9    23.0    +      -       +      +
    220C  VAL*     1.3    82.3    -      -       -      +
    222C  GLU*     1.3    58.4    +      -       -      +
    223C  LYS*     3.0    28.2    +      -       -      +
    224C  ARG*     3.0    24.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 222 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121C  LYS*     6.1     0.6    -      -       -      +
    202C  ASP*     3.7    11.0    -      -       -      +
    204C  ALA*     4.5     8.7    -      -       +      +
    205C  LYS*     2.9    29.9    +      -       -      -
    209C  ARG*     5.9     1.8    -      -       -      -
    215C  PHE*     4.7     6.1    -      -       -      -
    217C  VAL*     4.5    21.3    -      -       +      +
    218C  ASP      3.9     8.3    -      -       -      +
    219C  PRO      5.0     5.8    +      -       -      +
    220C  VAL      4.3     0.2    -      -       -      -
    221C  ASP*     1.3    73.1    +      -       -      +
    223C  LYS*     1.3    69.2    +      -       +      +
    224C  ARG      3.5     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 223 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121C  LYS      5.9     1.3    -      -       -      +
    215C  PHE*     3.6    13.6    -      -       -      -
    221C  ASP*     3.0    17.1    -      -       -      +
    222C  GLU*     1.3    88.1    -      -       +      +
    224C  ARG*     1.3    61.8    +      -       -      +
    225C  ASN      3.7     0.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 224 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129C  ARG*     3.4    47.3    -      -       -      +
    215C  PHE*     3.5     9.0    -      -       -      -
    217C  VAL*     3.7     0.2    -      -       -      -
    218C  ASP*     3.1    50.8    +      -       +      -
    221C  ASP*     3.0    13.8    +      -       +      +
    223C  LYS*     1.3    79.4    -      -       -      +
    225C  ASN*     1.3    78.3    +      -       -      +
    226C  VAL*     4.1     6.2    +      -       -      +
    501C  APC      3.1    32.1    +      -       -      -
     34D    C      2.5    38.9    +      -       -      -
     35D    A      3.0    39.3    +      -       -      -
     37D    C      5.9     0.2    -      -       -      +
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Residues in contact with ASN 225 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213C  GLU*     4.9     4.8    +      -       -      +
    214C  PHE      3.1    23.8    +      -       -      -
    215C  PHE*     3.6    32.4    -      -       +      +
    216C  VAL      2.9    22.9    +      -       -      -
    223C  LYS      3.7     3.2    +      -       -      -
    224C  ARG*     1.3    82.0    +      -       -      +
    226C  VAL*     1.3    63.3    +      -       -      +
    227C  ALA      3.0    11.4    +      -       -      -
    228C  ALA*     3.1    43.3    +      -       +      +
     34D    C      4.7     3.6    +      -       -      -
----------------------------------------------------------
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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