Contacts of the strand formed by residues 36 - 40 (chain A) in PDB entry 3SQ4


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 SER 36 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33A  TYR*     5.2     2.0    +      -       -      -
     34A  LYS      3.9     0.9    +      -       -      -
     35A  PRO*     1.3    78.8    +      -       -      +
     37A  LEU*     1.3    75.6    +      -       -      +
     38A  PHE*     4.4    12.1    -      -       -      -
     59A  ARG*     3.0    52.2    +      -       -      +
     60A  LYS      3.3     3.6    -      -       -      -
     61A  LEU*     3.9     9.0    -      -       -      +
     85A  MET      4.7     4.5    +      -       -      +
     88A  PHE*     5.3     0.2    -      -       -      -
     91A  ALA*     5.9     3.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 37 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  SER*     1.3    81.9    -      -       -      +
     38A  PHE*     1.3    71.9    +      -       -      +
     59A  ARG*     3.8     0.9    -      -       -      +
     60A  LYS*     2.8    34.6    +      -       -      +
     62A  PHE*     3.9     6.0    -      -       +      -
     68A  ALA*     3.8    24.5    -      -       +      +
     71A  TRP*     3.6    18.8    -      -       +      -
     72A  ILE*     3.6    35.4    -      -       +      -
     82A  ALA*     5.7     1.1    -      -       +      +
     83A  LEU      3.5    15.0    -      -       -      +
     84A  GLY      3.9    12.1    -      -       -      +
     85A  MET      3.7    22.9    -      -       -      +
     86A  ASP*     4.3     2.5    -      -       +      +
     88A  PHE*     4.1     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 38 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  SER*     4.4    10.1    -      -       -      -
     37A  LEU*     1.3    84.5    -      -       -      +
     39A  ALA*     1.3    60.4    +      -       -      +
     49A  TYR*     3.6    36.1    -      +       +      -
     57A  CYS*     4.3     8.1    -      -       +      -
     58A  THR      3.4    17.3    -      -       -      +
     59A  ARG*     3.6    31.4    -      -       +      -
     60A  LYS*     4.7     0.7    -      -       -      +
     71A  TRP*     3.4    11.5    -      -       -      -
     82A  ALA*     3.8     0.3    -      -       -      -
     83A  LEU*     2.9    39.5    +      -       +      +
     84A  GLY*     4.2     6.7    -      -       -      -
     85A  MET      5.9     0.2    -      -       -      -
    379A  VAL*     3.6    44.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 39 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38A  PHE*     1.3    74.5    -      -       -      +
     40A  HIS*     1.3    68.2    +      -       -      +
     57A  CYS*     3.4     4.0    -      -       -      -
     58A  THR*     2.9    35.9    +      -       +      +
     60A  LYS*     4.0    25.0    -      -       -      +
     71A  TRP*     4.1    10.3    -      -       +      -
     75A  MET*     4.3    12.6    -      -       +      -
     81A  GLU      4.6     2.0    -      -       -      -
     83A  LEU*     4.1     5.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 40 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39A  ALA*     1.3    80.0    -      -       -      +
     41A  CYS*     1.3    61.5    +      -       -      +
     51A  ASP*     2.7    30.0    +      -       -      -
     55A  LYS*     3.9    27.2    -      -       +      +
     56A  PRO      3.6     5.2    -      -       -      +
     57A  CYS*     3.9    13.5    -      -       -      +
     58A  THR*     4.7     1.2    -      -       -      +
     81A  GLU*     3.4    32.8    +      -       +      +
     83A  LEU*     4.0    15.3    -      -       +      +
----------------------------------------------------------
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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