Contacts of the strand formed by residues 265 - 268 (chain M) in PDB entry 1O18
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 ILE 265 (chain M).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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225M ALA* 4.1 25.1 - - + -
229M LEU* 4.2 18.4 - - + -
246M PHE* 6.3 0.2 - - + -
248M MLY 4.5 20.0 - - + -
249M PHE 3.5 4.0 - - - +
250M ILE* 4.3 17.9 - - + -
264M ASP* 1.3 83.3 - - - +
266M GLU* 1.3 86.4 + - - +
267M THR* 4.5 4.5 - - - +
442M VAL* 3.9 17.8 - - + +
445M ILE* 4.2 15.3 - - + -
446M ASN* 2.6 37.1 + - - +
449M LEU* 4.7 8.3 - - + -
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Residues in contact with GLU 266 (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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248M MLY 3.3 9.4 - - - +
249M PHE* 3.1 34.7 + - + +
264M ASP* 5.4 4.4 - - - +
265M ILE* 1.3 78.0 - - - +
267M THR* 1.3 72.5 + - - +
268M TYR* 3.1 37.2 + - + +
442M VAL* 4.9 2.0 - - - -
656M ASN* 4.6 6.8 + - - +
659M MLY 2.5 53.0 + - - +
660M LEU* 5.8 0.2 - - - +
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Residues in contact with THR 267 (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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229M LEU* 5.6 0.3 - - - +
246M PHE* 4.4 17.1 - - + -
247M GLY 3.6 4.9 + - - -
265M ILE* 4.5 3.8 - - - +
266M GLU* 1.3 82.0 + - - +
268M TYR* 1.3 80.8 + - - +
270M LEU* 4.9 5.4 - - + -
438M PHE* 3.4 38.7 - - + -
439M LEU* 4.7 11.4 - - + -
442M VAL* 3.7 19.6 - - - +
656M ASN* 5.4 2.8 - - - +
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Residues in contact with TYR 268 (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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246M PHE* 3.8 1.6 - - - +
247M GLY* 3.0 42.8 + - - +
248M MLY 4.1 2.0 - - - -
249M PHE* 3.8 29.8 - - + +
266M GLU* 3.1 37.6 + - + +
267M THR* 1.3 83.4 - - - +
269M LEU* 1.3 83.2 + - + +
270M LEU 3.7 0.7 - - - -
462M LEU* 5.1 0.2 - - + -
464M ILE* 4.3 17.3 - - + -
653M PHE* 5.5 9.0 - + + -
656M ASN* 4.2 29.6 - - + -
657M LEU* 5.0 1.3 - - - -
660M LEU* 3.5 38.0 - - + +
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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