Contacts of the helix formed by residues 438 - 443 (chain E) in PDB entry 4G3D
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 ALA 438 (chain E).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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357E ALA* 4.0 23.9 - - + +
358E LYS* 4.1 10.5 - - + +
361E ALA* 3.9 12.0 - - + +
436E PHE* 4.1 11.2 - - - -
437E ARG* 1.3 71.0 - - - +
439E GLU* 1.3 65.7 + - - +
441E LEU* 2.9 13.2 + - - +
442E MET* 2.9 43.4 + - + +
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Residues in contact with GLU 439 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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437E ARG* 3.0 30.3 + - - +
438E ALA* 1.3 86.3 + - - +
440E GLU* 1.3 66.6 + - - +
442E MET* 3.7 13.5 - - + -
443E ALA* 3.1 25.5 + - + +
535E PHE* 4.1 4.9 - - - +
538E ALA* 3.3 26.2 - - + +
539E VAL* 4.8 2.8 - - - +
540E CYS* 4.2 29.6 + - + +
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Residues in contact with GLU 440 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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429E LYS* 3.3 30.8 + - - +
431E VAL* 4.1 11.3 - - + +
436E PHE* 4.4 9.4 - - + -
437E ARG* 3.2 21.7 + - + +
439E GLU* 1.3 79.9 - - - +
441E LEU* 1.3 58.6 + - - +
444E CYS* 3.3 20.3 - - - +
467E ILE* 3.9 27.2 - - + +
534E ASP* 5.0 0.3 - - - -
535E PHE* 3.7 27.1 + - - +
536E GLY* 3.5 32.6 + - - +
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Residues in contact with LEU 441 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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353E LEU* 4.2 14.8 - - + -
354E THR* 5.4 3.6 - - - +
357E ALA* 3.9 15.7 - - + -
360E TRP* 4.3 2.7 - - + -
436E PHE* 3.3 38.1 - - + -
438E ALA 2.9 6.2 + - - +
440E GLU* 1.3 80.9 - - - +
442E MET* 1.3 56.8 + - + +
443E ALA 3.1 2.2 - - - -
444E CYS* 2.8 23.8 + - + -
445E ALA* 2.8 20.3 + - + +
455E LEU* 3.7 32.1 - - + -
458E ALA* 4.0 22.2 - - + -
467E ILE* 3.8 21.5 - - + -
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Residues in contact with MET 442 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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354E THR* 3.7 39.3 - - + +
357E ALA* 5.5 0.4 - - + -
358E LYS* 4.2 20.6 - - - +
438E ALA* 2.9 38.1 + - + +
439E GLU* 3.5 13.0 + - - +
441E LEU* 1.3 77.2 - - + +
443E ALA* 1.3 55.7 + - - +
444E CYS 3.4 2.6 + - - -
445E ALA* 4.4 5.9 + - - +
447E LEU* 5.7 1.7 - - - +
511E ILE* 4.4 6.9 - - - +
540E CYS* 4.1 26.8 - - + -
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Residues in contact with ALA 443 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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439E GLU* 3.1 17.6 + - - +
442E MET* 1.3 76.4 - - - +
444E CYS* 1.3 57.1 + - - +
447E LEU* 3.5 17.0 - - - +
506E LEU* 4.1 1.6 - - - +
511E ILE* 3.5 36.8 - - + -
535E PHE* 3.5 24.9 - - + -
538E ALA* 4.1 15.3 - - + -
539E VAL 5.8 0.2 - - - +
540E CYS* 5.1 4.9 - - - -
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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