Contacts of the helix formed by residues 227 - 230 (chain S) in PDB entry 1RZZ
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 SER 227 (chain S).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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227R LEU* 4.3 0.9 - - - -
5S ASN* 2.9 30.7 + - - +
223S ILE 2.9 13.2 + - - -
224S LEU* 3.0 13.8 + - - -
226S VAL* 1.3 73.8 - - - +
228S ARG* 1.3 56.6 + - - +
229S PHE 2.9 5.8 - - - -
230S GLY* 3.1 14.0 + - - -
231S GLY 3.9 0.7 - - - +
232S GLU* 3.5 32.7 - - - +
177T ARG* 5.1 0.7 + - - -
194T GLN* 3.1 25.9 + - - +
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Residues in contact with ARG 228 (chain S).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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112R GLY 2.7 40.6 + - - -
113R ILE 3.5 3.6 + - - -
114R GLY* 3.4 26.9 - - - +
115R TYR* 6.2 1.0 - - - -
116R HIS* 5.5 2.6 - - - -
3S TYR 5.8 2.2 + - - -
4S GLN* 5.9 1.2 + - - -
224S LEU 4.9 1.2 + - - -
225S ALA 3.7 12.1 + - - +
227S SER* 1.3 80.6 + - - +
229S PHE* 1.3 86.4 + - + +
230S GLY 3.5 0.2 - - - -
192T PRO* 4.0 6.8 - - - +
194T GLN* 3.1 24.1 + - + +
195T MET* 3.6 33.1 - - + +
234T CYS* 3.1 27.5 - - - +
238T ALA* 4.2 4.0 - - + -
241T LEU* 3.5 25.5 - - - +
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Residues in contact with PHE 229 (chain S).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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112R GLY 3.9 1.6 - - - -
113R ILE* 4.1 11.7 - - + -
226S VAL* 3.0 17.6 + - + +
227S SER 2.9 0.8 - - - -
228S ARG* 1.3 104.8 - - + +
230S GLY* 1.3 60.4 + - - +
231S GLY 3.3 0.6 + - - -
237S GLN* 4.0 6.4 + - - -
243S THR* 3.8 17.7 - - + -
244S ALA* 3.5 27.8 - - + +
247S ARG* 3.0 52.5 - - - -
117T ARG* 4.8 2.1 + - - -
230T GLU* 5.2 3.3 - - - +
231T ASP* 4.5 8.1 - - - +
234T CYS* 3.4 46.7 - - + +
238T ALA* 3.5 17.0 - - + -
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Residues in contact with GLY 230 (chain S).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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227S SER 3.1 8.1 + - - -
228S ARG 3.5 0.6 - - - -
229S PHE* 1.3 80.5 - - - +
231S GLY* 1.3 60.7 + - - +
232S GLU* 3.0 17.7 - - - -
233S CYS* 3.1 23.3 + - - +
237S GLN* 3.8 8.8 + - - -
177T ARG* 4.1 26.7 - - - +
230T GLU* 5.2 0.7 - - - -
234T CYS* 5.0 0.2 - - - -
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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
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Atomic class I II III IV V VI VII VIII
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I (Hydrophilic) + + + - + + + +
II (Acceptor) + - + - + + + -
III (Donor) + + - - + + - +
IV (Hydrophobic) - - - + + + + +
V (Aromatic) + + + + + + + +
VI (Neutral) + + + + + + + +
VII (Neutral-donor) + + - + + + - +
VIII (Neutral-acceptor) + - + + + + + -
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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