Contacts of the helix formed by residues 933 - 937 (chain A) in PDB entry 4QMH
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 933 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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849A ALA* 6.4 1.8 - - - -
850A ASP* 5.6 4.1 + - - +
854A ARG* 5.2 2.0 - - - +
931A MET 3.3 1.2 + - - -
932A GLY* 1.3 69.9 - - - -
934A GLY* 1.3 61.9 + - - +
935A CYS 3.0 2.2 + - - -
936A ARG* 3.3 25.6 + - - +
971A LYS 3.3 19.1 + - - +
972A GLY* 3.9 3.7 - - - +
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Residues in contact with GLY 934 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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896A PRO* 3.8 23.7 - - - +
931A MET* 3.2 23.3 + - - +
932A GLY 3.0 2.4 + - - -
933A ALA* 1.3 77.5 - - - +
935A CYS* 1.3 62.1 + - - +
936A ARG 3.1 0.7 - - - -
937A ASN* 3.1 29.3 + - - +
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Residues in contact with CYS 935 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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927A LEU* 6.5 0.2 - - + -
928A ALA* 4.3 17.0 - - - -
931A MET* 3.8 17.4 - - + +
932A GLY 3.0 23.5 + - - +
934A GLY* 1.3 78.6 - - - +
936A ARG* 1.3 63.6 + - - +
937A ASN 3.0 1.8 + - - -
938A HIS* 3.1 11.8 + - - +
939A VAL* 3.8 2.3 + - - -
968A PHE* 3.6 52.7 - - + -
971A LYS* 3.8 8.5 - - - -
972A GLY 3.6 21.3 - - - -
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Residues in contact with ARG 936 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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933A ALA 3.3 15.1 + - - +
934A GLY 3.1 0.8 - - - -
935A CYS* 1.3 81.4 - - - +
937A ASN* 1.3 75.4 + - - +
938A HIS 3.1 2.1 + - - -
939A VAL* 3.4 24.4 + - - +
940A ARG 5.0 0.3 + - - -
972A GLY* 3.6 25.6 - - - +
975A LYS* 6.2 0.4 - - - +
976A GLU* 3.6 39.4 + - - +
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Residues in contact with ASN 937 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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896A PRO* 3.4 23.6 + - - +
934A GLY* 3.3 17.9 - - - +
935A CYS 3.0 0.8 - - - -
936A ARG* 1.3 96.0 + - - +
938A HIS* 1.3 77.0 + - + +
940A ARG* 5.2 3.2 + - - +
941A ASN* 5.4 2.1 + - - -
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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