Contacts of the helix formed by residues 477 - 482 (chain B) in PDB entry 1EX0
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 477 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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333B ARG* 3.8 20.6 - - - +
335B VAL* 3.8 28.7 - - + -
377B GLU* 4.2 7.4 - - - +
464B ILE* 2.9 28.6 + - + +
465B VAL* 4.2 5.6 - - - +
466B THR* 4.0 10.1 - - + -
475B MET* 3.4 34.8 - - + +
476B ASP* 1.3 76.0 - - - +
478B THR* 1.3 58.4 + - - +
479B ASP* 3.2 9.4 - - - +
480B THR* 2.7 47.1 + - + +
481B TYR* 3.8 3.0 + - + -
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Residues in contact with THR 478 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
461B GLY 4.0 14.6 - - - +
462B LYS 3.9 16.8 - - - +
463B LEU* 3.4 8.7 - - - +
464B ILE* 2.9 34.2 + - + +
476B ASP* 2.6 23.6 + - - -
477B ILE* 1.3 74.4 - - - +
479B ASP* 1.3 55.9 + - - +
481B TYR* 3.0 22.3 + - - +
482B LYS* 3.2 24.4 + - + +
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Residues in contact with ASP 479 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
418B LYS* 2.8 36.4 + - - +
476B ASP* 3.5 8.4 + - - +
477B ILE* 3.5 17.0 - - - +
478B THR* 1.3 78.2 - - - +
480B THR* 1.3 70.6 + - - +
481B TYR 3.2 0.2 - - - -
482B LYS 3.4 13.1 - - - +
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Residues in contact with THR 480 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
333B ARG* 5.2 7.1 + - - +
377B GLU* 4.8 1.0 + - - -
392B TRP* 6.3 2.2 - - + -
414B VAL* 3.3 21.9 - - - +
415B GLN* 5.2 1.6 + - - -
418B LYS* 3.4 20.7 - - - +
477B ILE* 2.7 39.8 + - + +
479B ASP* 1.3 93.0 - - - +
481B TYR* 1.3 73.2 + - - +
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Residues in contact with TYR 481 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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335B VAL* 4.3 1.0 - - + +
375B TRP* 3.0 36.6 + + - -
377B GLU* 2.6 31.5 + - - -
394B ALA* 3.7 4.2 - - + +
414B VAL* 3.6 23.1 - - + +
417B ILE* 4.1 25.0 - - + +
418B LYS* 3.3 27.0 + - - +
431B VAL* 4.2 15.0 - - + -
435B VAL* 4.4 11.9 - - + +
436B ASN* 4.9 2.9 + - - -
464B ILE* 3.6 42.2 - - + -
477B ILE* 4.2 4.5 - - + -
478B THR 3.0 4.3 + - - +
480B THR* 1.3 100.6 + - - +
482B LYS* 1.3 66.3 + - + +
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Residues in contact with LYS 482 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
418B LYS* 3.9 2.8 - - - +
435B VAL* 3.0 35.1 + - + +
436B ASN* 3.8 21.8 + - - +
457B ALA 5.4 4.8 + - - -
458B THR* 5.4 2.4 + - - +
460B ILE 3.1 17.4 + - - -
461B GLY 3.2 19.0 + - - +
462B LYS* 5.2 0.4 - - - +
464B ILE* 4.9 1.6 - - + -
478B THR* 3.2 18.5 + - + +
479B ASP* 3.4 25.1 + - - +
480B THR 3.7 1.0 - - - -
481B TYR* 1.3 92.8 - - + +
483B PHE* 1.3 70.1 + - - +
485B GLU* 6.2 4.0 - - - +
490B GLU* 5.3 6.9 + - - -
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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