Contacts of the helix formed by residues 193 - 196 (chain M) in PDB entry 2I5N
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 ASN 193 (chain M).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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250C ALA 3.5 3.7 + - - +
251C GLN* 3.0 27.8 + - - +
252C THR* 5.7 0.9 - - - -
253C PHE* 6.5 0.7 - - + -
155L ASP* 4.9 0.2 + - - -
158L ASN* 3.2 23.8 + - - +
188M SER* 2.9 19.6 + - - -
189M ILE* 4.6 1.2 + - - +
191M TYR 3.5 0.2 - - - -
192M GLY* 1.3 83.8 - - - +
194M PHE* 1.3 59.0 + - - +
195M TYR* 3.1 26.4 + - - -
196M TYR* 2.9 46.1 + - + +
292M TRP* 3.7 5.0 - - - +
401M BCB 4.6 0.2 - - - +
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Residues in contact with PHE 194 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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187M PHE* 3.7 27.6 - + - -
188M SER* 3.0 31.4 + - - +
191M TYR* 4.1 7.2 - - + -
193M ASN* 1.3 68.1 + - - +
195M TYR* 1.3 63.3 + - - +
196M TYR 3.0 0.4 - - - -
197M CYS* 3.1 17.3 + - + +
200M HIS* 3.1 31.7 + + + +
282M ILE* 4.0 6.1 - - + -
285M THR* 3.8 29.6 - - + -
292M TRP* 4.0 18.2 - + - -
401M BCB 3.4 71.6 - + + -
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Residues in contact with TYR 195 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
151L LEU* 4.7 1.7 - - - +
154L LEU* 3.7 34.3 - - + +
157L VAL* 3.4 13.4 - - + +
158L ASN* 3.4 39.9 - - + -
400L BCB 3.1 25.4 - - + +
401L BCB 3.6 22.4 - - + -
702L LDA 3.5 23.0 - - - +
193M ASN* 3.1 26.2 + - - +
194M PHE* 1.3 75.7 - - - +
196M TYR* 1.3 64.9 + - + +
200M HIS* 4.1 8.2 + + - -
401M BCB 2.8 55.6 + - + +
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Residues in contact with TYR 196 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
251C GLN* 2.8 29.9 + - + -
151L LEU* 3.8 31.1 - - + +
154L LEU* 6.0 0.7 - - + -
155L ASP* 2.7 32.5 + - - -
702L LDA 4.0 4.2 - - - +
193M ASN* 2.9 39.1 + - + +
195M TYR* 1.3 82.3 - - + +
197M CYS* 1.3 58.2 + - - +
198M PRO* 3.4 7.3 - - - +
292M TRP* 3.6 10.9 - - - +
293M TYR* 3.5 29.4 - + - +
296M CYS* 3.2 39.0 - - + -
302M ALA* 4.0 14.8 - - + -
303M PRO* 3.6 5.8 - - + +
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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