Contacts of the helix formed by residues 155 - 159 (chain G) in PDB entry 1RQF
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.
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 155 (chain G).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
127G ILE 4.3 1.6 - - - +
128G PRO* 3.7 5.3 - - - +
129G GLY* 2.5 36.2 + - - -
131G ALA 3.5 8.0 - - - +
132G MET* 3.8 15.0 - - + +
153G HIS 3.6 4.6 + - - -
154G THR* 1.3 73.1 - - - +
156G GLY* 1.3 65.0 + - - +
157G ALA* 2.7 36.0 + - - +
158G TYR* 3.3 48.8 + - + +
159G PHE* 3.7 6.2 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with GLY 156 (chain G).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
123G GLY* 3.5 22.1 - - - -
124G LEU 5.3 0.4 - - - -
125G SER 4.1 1.8 - - - -
131G ALA 3.0 16.3 + - - -
132G MET 3.9 1.1 - - - -
133G VAL* 3.3 28.3 - - - +
155G ASP* 1.3 67.8 - - - +
157G ALA* 1.3 55.8 + - - +
158G TYR 3.0 5.8 - - - -
159G PHE* 2.9 19.5 + - - +
160G GLY 3.1 9.7 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 157 (chain G).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
82G LEU* 5.0 4.6 - - + +
85G ALA* 3.5 15.2 - - - +
125G SER 3.5 11.9 + - - +
126G ASP* 3.6 29.7 - - - +
127G ILE 3.9 2.0 - - - +
128G PRO* 3.8 22.9 - - + -
131G ALA 4.5 0.6 + - - -
155G ASP* 2.7 17.8 + - - +
156G GLY* 1.3 76.7 - - - +
158G TYR* 1.3 61.5 + - + +
159G PHE 3.0 4.2 + - - -
160G GLY* 3.6 6.2 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with TYR 158 (chain G).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
22G PHE* 3.9 26.0 - + + -
77G GLU* 4.5 11.0 - - + -
78G MET* 3.5 49.9 - - + +
81G GLY* 3.4 34.1 - - - +
82G LEU* 3.7 15.3 - - + -
84G HIS* 2.9 27.5 + - - -
85G ALA* 3.5 11.9 + - - -
128G PRO* 4.9 4.1 - - + +
154G THR* 5.0 0.2 - - + -
155G ASP* 3.6 44.3 + - + +
156G GLY 3.0 1.2 - - - -
157G ALA* 1.3 83.7 - - + +
159G PHE* 1.3 61.0 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with PHE 159 (chain G).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
21G PHE* 3.6 43.3 - - + -
22G PHE* 4.0 20.4 - + - -
84G HIS* 3.6 16.8 - + - -
85G ALA* 4.8 5.1 - - - +
88G ILE* 3.6 13.4 - - + +
89G LEU* 5.9 0.3 - - - +
97G MET* 4.4 2.7 - - + -
121G PRO* 3.5 22.2 - - + +
122G ILE* 4.5 15.0 - - - +
133G VAL* 3.8 15.9 - - + -
154G THR* 3.6 27.1 - - + -
155G ASP 3.7 11.7 - - - -
156G GLY 2.9 6.3 + - - +
157G ALA 4.4 0.2 - - - -
158G TYR* 1.3 87.6 - - + +
160G GLY* 1.3 65.7 + - - +
163G PHE* 3.2 23.0 + - - +
----------------------------------------------------------
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