Contacts of the helix formed by residues 974 - 979 (chain A) in PDB entry 3POZ
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 ASP 974 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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970A LYS 3.9 2.6 + - - +
971A MET 3.0 6.5 + - - +
973A ARG* 1.3 80.9 - - + +
975A PRO* 1.3 67.5 - - - +
976A GLN* 4.5 3.6 + - - +
977A ARG* 3.1 42.8 + - + +
978A TYR* 3.3 18.7 - - + -
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Residues in contact with PRO 975 (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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811A SER* 3.3 24.0 - - - +
812A GLN* 3.4 30.7 - - + +
815A LEU* 3.6 19.8 - - + +
971A MET 3.4 9.2 - - - +
972A ALA 3.5 11.0 - - - +
973A ARG 3.7 2.7 - - - +
974A ASP* 1.3 88.4 - - - +
976A GLN* 1.3 61.5 + - + +
978A TYR* 3.1 17.5 + - - +
979A LEU 3.1 13.2 + - - +
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Residues in contact with GLN 976 (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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811A SER* 3.8 4.0 - - - +
974A ASP* 3.2 4.7 + - - +
975A PRO* 1.3 77.8 - - + +
977A ARG* 1.3 63.6 + - - +
978A TYR 3.3 0.2 - - - -
979A LEU 3.5 17.1 - - - +
980A VAL* 4.8 6.2 - - - +
984A ASP* 3.7 32.6 + - - +
985A GLU* 3.0 28.4 + - - +
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Residues in contact with ARG 977 (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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940A THR* 3.4 16.7 - - - +
942A ASP* 5.2 5.9 + - - +
974A ASP* 3.1 38.3 + - - +
976A GLN* 1.3 78.2 - - - +
978A TYR* 1.3 95.9 + - + +
980A VAL* 5.4 0.7 - - - +
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Residues in contact with TYR 978 (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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815A LEU* 4.6 4.9 - - + -
940A THR* 2.7 33.2 + - - -
942A ASP* 3.9 27.8 - - + -
943A VAL* 3.4 19.5 - - + +
970A LYS* 4.4 19.1 + - + +
971A MET* 3.7 60.6 - - + -
974A ASP* 3.3 30.7 - - + -
975A PRO 3.1 5.4 + - - +
977A ARG* 1.3 125.0 + - + +
979A LEU* 1.3 60.9 + - - +
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Residues in contact with LEU 979 (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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811A SER* 4.0 24.9 - - - +
814A LEU* 3.9 19.1 - - + -
815A LEU* 3.8 31.2 - - + -
908A MET* 3.8 34.5 - - + -
938A ILE* 3.3 15.5 - - + +
939A CYS* 4.0 14.1 - - - -
943A VAL* 4.0 9.6 - - + -
975A PRO 3.1 3.9 + - - +
976A GLN* 3.5 22.2 - - - +
978A TYR* 1.3 85.5 - - - +
980A VAL* 1.3 64.1 + - - +
981A ILE* 3.8 9.9 + - + -
984A ASP* 4.5 1.6 - - - +
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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