Contacts of the helix formed by residues 43 - 47 (chain B) in PDB entry 4AG2
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 43 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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42B THR* 1.3 78.8 + - - +
44B ALA* 1.3 63.6 - - - +
45B HIS* 3.9 9.9 - - + +
46B CYS* 3.2 18.7 + - - +
89B ASP* 3.5 25.4 - - - +
91B MET* 3.4 15.4 - - - +
183B GLY* 3.4 21.9 - - - +
195B ILE* 4.2 1.8 - - + -
196B VAL 3.8 11.7 - - - +
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Residues in contact with ALA 44 (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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43B ALA* 1.3 66.2 - - - +
45B HIS* 1.3 59.8 + - - +
46B CYS 3.0 6.8 + - - -
47B ALA* 3.1 21.5 + - - +
77B ARG* 3.2 30.8 + - + -
81B TYR* 3.7 21.6 - - + -
89B ASP* 2.7 9.9 + - - +
90B ILE 3.4 28.9 - - - +
91B MET* 3.7 11.0 - - - -
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Residues in contact with HIS 45 (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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28B LYS* 2.8 20.8 + - - -
30B CYS* 5.1 0.2 - - - -
43B ALA* 3.2 7.0 - - + +
44B ALA* 1.3 77.1 - - - +
46B CYS* 1.3 60.1 + - - +
47B ALA* 3.2 2.6 + - - +
81B TYR* 3.1 23.5 + - - +
86B LEU* 4.0 6.6 - - + +
89B ASP* 2.7 28.9 + - - +
182B SER* 3.0 21.9 + - - -
197B SER 3.0 27.6 - - - -
1227B LMR 2.9 28.7 + - - -
17D THR* 3.7 12.3 - - + +
39D GLU* 4.3 3.1 - - - +
50D TYR* 3.5 22.2 + + + +
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Residues in contact with CYS 46 (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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18B LEU* 4.8 2.7 - - + -
20B ILE* 3.3 26.0 - - + +
28B LYS* 3.6 5.8 - - - +
30B CYS* 2.1 52.5 - - + -
42B THR* 4.0 7.6 - - - +
43B ALA* 3.2 21.0 + - - +
44B ALA 3.0 0.8 - - - -
45B HIS* 1.3 80.1 - - - +
47B ALA* 1.3 65.8 + - - +
51B ILE* 4.2 2.1 - - - +
91B MET* 4.0 6.1 - - + -
182B SER* 3.9 19.3 - - - -
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Residues in contact with ALA 47 (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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22B THR* 5.1 0.2 - - - +
28B LYS* 3.1 16.6 + - - -
44B ALA 3.1 16.2 + - - +
45B HIS 3.2 1.4 - - - +
46B CYS* 1.3 81.7 - - - +
48B GLY* 1.3 60.5 + - - +
51B ILE* 4.5 0.4 - - - -
75B GLN* 3.4 16.8 - - + +
77B ARG* 3.9 19.5 - - - +
91B MET* 3.6 17.3 - - - +
39D GLU* 4.2 7.1 - - - +
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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