Contacts of the helix formed by residues 173 - 179 (chain S) in PDB entry 5IYB
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 HIS 173 (chain S).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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1278A LYS 5.9 1.1 - - - -
1280A ASP* 3.1 36.5 + - - -
309B PHE* 5.7 0.2 - - + -
25I TYR* 5.9 2.0 - + + -
27I LYS* 6.4 1.8 - - + -
40I ARG* 3.2 63.6 + - + +
164S TRP* 5.2 2.0 - - - -
170S VAL 5.9 2.0 - - - -
172S ASN* 1.3 94.2 + - - +
174S PHE* 1.3 88.7 + + + +
175S SER 3.5 0.9 - - - -
176S ILE* 3.6 12.6 - - - +
177S MET* 3.1 27.4 - - - +
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Residues in contact with PHE 174 (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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27I LYS* 6.6 0.4 - - + -
40I ARG* 4.9 15.3 - - - -
42I CYS 5.5 6.3 - - - -
43I ASP* 6.4 0.9 - - - -
172S ASN* 3.2 1.9 + - - +
173S HIS* 1.3 101.2 + + + +
175S SER* 1.3 70.9 + - - +
177S MET* 3.3 13.2 + - + +
178S GLN* 3.1 52.9 + - + +
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Residues in contact with SER 175 (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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1278A LYS* 4.2 21.1 + - - +
172S ASN* 3.2 28.6 + - - -
174S PHE* 1.3 82.8 - - - +
176S ILE* 1.3 63.7 + - - +
178S GLN* 3.2 9.6 + - - +
179S GLN* 3.1 36.4 + - - +
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Residues in contact with ILE 176 (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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161S GLU* 5.4 15.9 - - + +
164S TRP* 4.7 41.7 - - + +
172S ASN* 4.4 5.0 + - - +
173S HIS* 3.6 21.3 - - - +
175S SER* 1.3 79.4 - - - +
177S MET* 1.3 70.0 + - + +
178S GLN 3.4 0.3 + - - -
179S GLN* 3.3 31.1 + - - +
180S ARG* 4.1 6.8 + - - +
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Residues in contact with MET 177 (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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309B PHE* 6.1 1.3 - - - +
312B GLN* 5.6 4.0 - - - +
40I ARG* 3.7 29.4 - - - +
41I ASN* 3.7 25.4 - - + +
153S ARG 4.5 1.6 - - - +
154S THR* 4.2 18.9 - - - +
155S LEU* 4.9 15.5 - - + -
173S HIS 3.1 22.2 - - - +
174S PHE* 3.3 7.1 + - + +
176S ILE* 1.3 81.2 - - + +
178S GLN* 1.3 68.1 + - - +
180S ARG* 3.9 16.6 - - - +
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Residues in contact with GLN 178 (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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174S PHE* 3.1 56.5 - - + +
175S SER* 3.2 10.0 + - - +
177S MET* 1.3 84.0 + - - +
179S GLN* 1.3 56.7 + - + +
180S ARG 3.0 22.4 - - - +
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Residues in contact with GLN 179 (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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175S SER* 3.1 29.5 + - - +
176S ILE* 3.3 31.7 + - + +
178S GLN* 1.3 73.4 - - + +
180S ARG* 1.3 64.5 + - - +
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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