Contacts of the helix formed by residues 47 - 52 (chain 7) in PDB entry 4E2I
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 47 (chain 7).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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437 GLY 4.1 3.1 - - - +
447 GLU* 3.3 18.7 + - - +
457 LEU 3.1 1.0 - - - -
467 ILE* 1.3 77.7 - - - +
487 PHE* 1.3 59.8 - - - +
497 CYS 3.3 0.2 - - - -
507 THR* 3.8 8.6 + - - -
517 SER* 3.6 19.4 + - - -
697 PHE* 6.5 0.9 - - + -
617G PHE* 4.6 1.3 - - - -
621G MET* 3.6 24.0 - - - -
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Residues in contact with PHE 48 (chain 7).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
447 GLU 3.6 0.8 + - - -
457 LEU* 3.0 15.6 + - + +
477 ALA* 1.3 77.7 - - - +
497 CYS* 1.3 55.0 + - - +
507 THR 3.1 6.1 + - - -
517 SER* 3.4 16.7 + - - -
527 THR* 2.8 38.8 + - + -
617 ILE* 3.2 39.7 - - + +
647 SER* 3.3 28.9 - - - -
657 PHE* 3.5 36.8 - + + -
687 GLU* 3.5 29.8 - - + -
697 PHE* 5.0 4.9 - - + -
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Residues in contact with CYS 49 (chain 7).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
177 LEU* 6.3 0.9 - - - -
457 LEU* 3.8 19.3 - - - -
467 ILE* 3.3 19.0 + - + +
477 ALA 3.3 0.4 - - - -
487 PHE* 1.3 80.0 - - - +
507 THR* 1.3 58.5 + - - +
527 THR* 4.2 3.4 - - - -
537 HIS* 3.7 1.9 - - - -
547 LYS* 2.9 45.7 + - - +
557 VAL* 5.1 4.0 - - - +
577 LEU* 3.6 30.1 - - - -
617 ILE* 4.3 13.7 - - - -
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Residues in contact with THR 50 (chain 7).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
467 ILE* 3.2 14.4 + - - +
477 ALA* 4.0 7.9 - - - -
487 PHE 3.1 0.4 - - - -
497 CYS* 1.3 79.1 + - - +
517 SER* 1.3 61.9 + - - +
527 THR 3.1 1.8 - - - -
537 HIS* 2.9 36.3 + - + +
614G LYS* 6.3 2.2 - - - -
617G PHE* 3.2 27.8 - - + -
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Residues in contact with SER 51 (chain 7).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
477 ALA 3.6 13.0 + - - -
487 PHE* 3.4 21.1 + - - -
507 THR* 1.3 78.9 - - - +
527 THR* 1.3 67.8 + - - +
537 HIS* 4.6 2.8 + - - -
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Residues in contact with THR 52 (chain 7).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
487 PHE* 2.8 40.7 + - + +
517 SER* 1.3 89.1 + - - +
537 HIS* 1.3 74.3 + - - +
547 LYS* 3.7 36.8 + - - +
617 ILE* 5.2 0.5 - - - +
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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