Contacts of the strand formed by residues 273 - 276 (chain C) in PDB entry 3CB4


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 THR 273 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192C  GLN*     5.2     4.9    -      -       -      +
    193C  ALA      3.1     8.7    -      -       -      -
    195C  ILE*     4.0     1.3    -      -       -      -
    225C  VAL*     4.1     0.2    -      -       -      -
    226C  MET*     3.1    50.4    +      -       -      +
    271C  GLY      4.5     2.0    -      -       -      +
    272C  ASP*     1.3    89.1    +      -       -      +
    274C  LEU*     1.3    66.9    +      -       -      +
    284C  ALA*     3.7    11.8    -      -       +      +
    285C  LEU*     3.0    53.6    -      -       +      +
    288C  PHE*     5.9     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 274 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191C  LEU*     3.5     9.0    -      -       +      +
    192C  GLN*     3.4     7.8    -      -       -      -
    193C  ALA*     2.7    44.1    +      -       +      +
    195C  ILE*     3.7    22.4    -      -       +      -
    208C  SER*     6.0     1.3    -      -       -      -
    210C  ILE*     3.5    29.2    -      -       +      -
    217C  LEU*     5.4     1.3    -      -       +      -
    223C  VAL*     4.7    11.9    -      -       +      -
    224C  LYS      3.7     5.6    -      -       -      +
    225C  VAL*     3.3    40.8    -      -       +      +
    258C  LEU*     3.5    19.3    -      -       +      -
    268C  ALA*     6.3     0.4    -      -       +      -
    273C  THR*     1.3    72.8    +      -       -      +
    275C  THR*     1.3    62.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 275 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191C  LEU*     3.0    29.4    +      -       -      -
    223C  VAL*     3.4     5.7    -      -       -      +
    224C  LYS*     2.7    53.1    +      -       +      +
    226C  MET*     3.9    21.8    -      -       +      -
    273C  THR*     5.2     0.2    -      -       -      -
    274C  LEU*     1.3    73.1    -      -       -      +
    276C  LEU*     1.3    70.8    +      -       -      +
    279C  ASN      3.7     2.6    +      -       -      -
    280C  PRO*     3.5     8.6    -      -       +      +
    281C  ALA*     2.8    34.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 276 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191C  LEU*     3.7    31.3    -      -       +      +
    216C  THR      4.6     7.4    -      -       -      +
    217C  LEU*     4.7     2.0    -      -       +      -
    221C  ASP*     3.5    37.9    -      -       +      +
    222C  LYS      4.0     7.9    -      -       -      +
    223C  VAL*     5.0     0.4    -      -       +      -
    224C  LYS*     4.4     2.2    -      -       -      +
    275C  THR*     1.3    86.1    +      -       -      +
    277C  ALA*     1.3    62.6    +      -       -      +
    278C  ARG*     4.0    28.5    -      -       +      +
    279C  ASN*     3.8    31.0    -      -       +      +
    280C  PRO*     3.3    21.0    -      -       -      +
----------------------------------------------------------
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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