Contacts of the helix formed by residues 22 - 31 (chain D) in PDB entry 1AX4
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 ARG 22 (chain D).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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20D PRO 3.6 0.2 + - - -
21D SER* 1.3 73.4 - - - +
23D GLU* 1.3 54.6 + - - +
25D ARG* 3.4 30.0 - - - +
26D GLU* 2.6 68.5 + - + +
382D LEU* 3.2 47.6 + - - +
383D GLU* 2.5 32.7 + - - +
440D LYS* 4.3 5.9 - - - +
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Residues in contact with GLU 23 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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21D SER* 3.1 20.0 - - - +
22D ARG* 1.3 74.9 - - - +
24D GLU* 1.3 58.0 + - + +
26D GLU* 3.0 9.6 + - - +
27D ALA* 2.5 40.8 + - + +
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Residues in contact with GLU 24 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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18D ARG* 2.6 38.1 + - - +
20D PRO* 3.6 9.2 - - + -
21D SER* 2.5 53.8 + - - +
23D GLU* 1.3 72.0 - - + +
25D ARG* 1.3 55.6 + - - +
27D ALA* 3.5 6.0 - - - +
28D ALA* 2.5 41.2 + - + +
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Residues in contact with ARG 25 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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19D VAL* 3.2 18.2 - - - +
20D PRO* 3.0 38.9 + - + +
21D SER* 2.7 19.8 + - - +
22D ARG* 3.4 35.1 - - - +
24D GLU* 1.3 72.3 - - - +
26D GLU* 1.4 54.1 + - - +
29D LEU* 2.7 38.5 + - - +
381D TYR* 3.5 22.6 + - + +
382D LEU* 2.5 38.9 + - + -
383D GLU* 3.6 19.2 + - - +
384D SER 4.3 1.9 - - - -
385D GLY* 3.9 25.4 - - - +
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Residues in contact with GLU 26 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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22D ARG* 2.6 58.2 + - - +
23D GLU* 3.3 7.2 - - - +
25D ARG* 1.4 72.9 - - - +
27D ALA* 1.3 51.9 + - - +
29D LEU* 3.7 0.9 - - - +
30D LYS* 2.7 39.1 + - - +
382D LEU* 3.4 25.8 - - + -
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Residues in contact with ALA 27 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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23D GLU* 2.5 21.6 + - + +
24D GLU* 3.5 7.9 - - - +
26D GLU* 1.3 70.8 - - - +
28D ALA* 1.4 52.9 + - - +
30D LYS* 3.1 11.1 + - - +
31D GLU* 2.7 42.6 + - - +
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Residues in contact with ALA 28 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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20D PRO* 6.5 0.2 - - + -
24D GLU* 2.5 22.5 + - + +
25D ARG 3.6 2.9 - - - +
27D ALA* 1.4 74.0 - - - +
29D LEU* 1.3 58.2 + - - +
31D GLU* 3.1 8.5 + - - +
32D ALA* 2.7 30.5 + - - +
39D LEU* 3.8 5.0 - - + +
40D PRO* 5.7 1.9 - - + +
43D ALA* 3.8 19.3 - - + -
381D TYR* 3.8 16.8 - - - +
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Residues in contact with LEU 29 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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25D ARG 2.7 20.7 + - - +
26D GLU 3.8 1.8 - - - +
28D ALA* 1.3 68.9 - - - +
30D LYS* 1.3 67.7 + - - +
32D ALA* 3.2 6.0 + - + -
34D TYR* 2.9 73.4 + - + -
35D ASN 4.1 2.9 - - - +
36D PRO* 4.6 11.0 - - + -
39D LEU* 4.1 10.9 - - + +
378D ASN* 4.1 28.9 - - + +
381D TYR* 4.0 16.2 - - + -
382D LEU* 3.6 32.8 - - + -
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Residues in contact with LYS 30 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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26D GLU 2.7 23.2 + - - +
27D ALA* 3.3 9.2 - - - +
29D LEU* 1.3 73.2 - - - +
31D GLU* 1.3 55.8 + - - +
33D GLY* 2.9 21.5 + - - -
34D TYR* 3.8 32.6 + - + +
462D ARG* 4.3 4.2 + - - -
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Residues in contact with GLU 31 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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27D ALA* 2.7 23.4 + - - +
28D ALA* 3.6 6.6 - - - +
30D LYS* 1.3 67.9 - - - +
32D ALA* 1.3 57.7 + - - +
33D GLY 3.1 4.7 - - - -
462D ARG* 3.0 22.9 + - - +
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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