Contacts of the helix formed by residues 222 - 226 (chain W) in PDB entry 1XDM
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 TYR 222 (chain W).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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7W LEU* 3.5 13.7 - - + -
12W LYS* 3.2 58.0 - - + +
13W LYS 5.0 0.2 + - - -
15W LEU* 4.5 5.6 - - + -
16W SER* 3.3 21.5 + - - -
178W GLN* 2.9 36.6 + - - +
220W HIS 3.5 2.1 + - - +
221W VAL* 1.3 69.1 - - - +
223W LEU* 1.3 67.0 + - - +
224W GLU* 3.2 25.7 - - + +
225W GLY* 2.9 35.0 + - - +
258X ARG* 4.0 24.7 - - - +
364X SO4 4.0 4.8 + - - -
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Residues in contact with LEU 223 (chain W).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
213W TYR* 4.0 23.3 - - + +
216W LEU* 4.3 16.8 - - + -
217W ASN* 5.2 6.7 - - + +
221W VAL* 3.4 16.5 + - + +
222W TYR* 1.3 72.6 - - - +
224W GLU* 1.3 70.4 + - - +
225W GLY 2.7 2.4 + - - -
226W THR* 2.9 27.5 + - + +
261W PRO* 3.9 20.9 - - + -
263W ALA* 3.6 15.9 - - + +
264W VAL* 3.7 16.4 - - + -
265W PRO* 3.3 8.0 - - - +
258X ARG* 3.6 31.8 - - + +
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Residues in contact with GLU 224 (chain W).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
16W SER* 4.2 8.6 - - - +
19W ALA* 3.8 4.5 - - - +
20W GLN* 5.1 2.9 + - - -
222W TYR* 3.3 29.0 - - + +
223W LEU* 1.3 78.4 + - - +
225W GLY* 1.3 56.3 - - - +
263W ALA* 3.3 17.9 + - - +
265W PRO* 3.3 21.0 - - - +
254X THR* 4.6 1.7 - - + +
257X HIS* 3.1 36.2 + - + +
258X ARG* 2.5 42.9 + - - -
291X LEU* 6.4 0.4 - - + -
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Residues in contact with GLY 225 (chain W).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
15W LEU* 3.7 32.1 - - - +
19W ALA* 3.8 3.4 - - - -
178W GLN* 2.7 27.0 + - - -
183W VAL* 4.6 3.3 - - - +
184W PRO* 4.0 7.8 - - - +
222W TYR* 2.9 19.7 + - - -
223W LEU 2.7 2.6 + - - -
224W GLU* 1.3 73.3 - - - +
226W THR* 1.3 55.8 + - - -
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Residues in contact with THR 226 (chain W).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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19W ALA* 3.9 3.8 - - - +
178W GLN* 3.0 15.1 + - - -
183W VAL* 4.3 6.5 - - - -
184W PRO* 3.8 16.4 - - - +
186W VAL* 4.2 11.4 - - + -
213W TYR* 5.1 5.2 - - + -
216W LEU* 6.0 0.9 - - + -
221W VAL* 3.8 7.2 - - + +
222W TYR 3.3 2.6 + - - -
223W LEU* 2.9 24.3 + - + +
224W GLU 3.6 0.6 - - - -
225W GLY* 1.3 77.5 + - - -
227W LEU* 1.3 96.0 + - - +
264W VAL* 4.5 14.4 - - + -
265W PRO* 3.0 25.4 - - - +
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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