Contacts of the helix formed by residues 36 - 43 (chain B) in PDB entry 1QPW
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 PRO 36 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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127A LYS* 5.2 5.6 - - - +
32B LEU 3.8 10.5 - - - +
33B VAL 3.9 13.2 - - - +
34B VAL 3.4 7.6 - - - +
35B TYR* 1.3 81.9 - - - +
37B TRP* 1.3 74.2 + - + +
38B THR 3.1 1.6 + - - -
39B GLN* 3.2 34.5 + - - +
92C ARG* 4.1 5.6 - - + +
139C LYS 5.5 1.3 - - - +
140C TYR* 4.0 32.3 - - + +
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Residues in contact with TRP 37 (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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35B TYR* 3.7 26.9 - + + -
36B PRO* 1.3 83.9 - - + +
38B THR* 1.4 66.5 + - + +
39B GLN 3.2 1.1 - - - -
40B ARG* 3.2 23.1 + - - +
41B PHE* 4.6 4.4 - + - -
102B ASN* 3.2 17.8 + - - -
105B LEU* 3.9 22.7 - - + -
92C ARG* 3.4 29.4 - - - +
94C ASP* 3.5 32.1 + - + +
95C PRO* 3.4 28.0 - - + -
140C TYR* 3.6 46.4 - + + +
141C ARG* 4.4 14.4 - - - -
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Residues in contact with THR 38 (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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31B LEU* 3.6 29.5 + - + +
32B LEU* 3.5 16.8 - - - +
35B TYR* 3.0 23.1 + - + +
36B PRO 3.1 0.2 + - - -
37B TRP* 1.4 90.1 - - + +
39B GLN* 1.3 64.3 + - - +
40B ARG 3.1 2.8 + - - -
41B PHE* 3.3 15.1 + - - +
42B PHE* 3.3 15.9 - - - -
102B ASN* 4.0 9.2 - - - +
105B LEU* 5.3 0.7 - - + -
750B HEM 3.8 25.6 - - + -
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Residues in contact with GLN 39 (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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32B LEU* 2.8 46.3 + - + +
33B VAL* 4.5 4.0 - - - +
36B PRO* 3.2 26.0 + - - +
38B THR* 1.3 76.0 - - - +
40B ARG* 1.3 63.5 + - - +
42B PHE* 2.9 16.2 + - - +
43B GLU* 3.3 10.6 + - - -
48B LEU* 3.8 40.3 + - + +
54B VAL* 4.7 3.2 - - - +
92C ARG* 3.7 28.8 + - - +
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Residues in contact with ARG 40 (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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37B TRP 3.2 17.4 + - - +
38B THR 3.1 0.4 - - - -
39B GLN* 1.3 78.3 - - - +
41B PHE* 1.3 74.2 + - + +
42B PHE 3.5 0.2 + - - -
43B GLU* 3.9 33.7 + - - +
41C THR 5.7 1.8 - - - -
42C TYR* 3.4 42.7 + - - +
90C LYS 5.1 0.8 + - - -
91C LEU* 3.2 39.2 + - - +
92C ARG* 3.7 31.9 - - + +
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Residues in contact with PHE 41 (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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37B TRP* 4.6 8.5 - + - -
38B THR* 3.3 12.3 + - - +
39B GLN 3.1 1.0 - - - -
40B ARG* 1.3 88.0 - - + +
42B PHE* 1.3 64.0 + - + +
43B GLU* 3.5 1.7 + - - -
96B LEU* 3.4 27.1 - - + -
97B HIS* 3.6 22.2 - - + -
98B VAL* 4.0 15.0 - - + -
99B ASP 4.9 1.8 - - - -
102B ASN* 5.4 0.2 - - - -
750B HEM 3.5 66.5 - - + +
41C THR* 5.8 2.0 - - - -
42C TYR* 5.4 9.4 - + - -
94C ASP* 4.8 14.4 - - + -
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Residues in contact with PHE 42 (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 LEU* 3.9 19.7 - - + -
31B LEU* 4.9 0.4 - - + -
32B LEU* 3.7 28.0 - - + -
38B THR 3.3 17.7 - - - -
39B GLN 2.9 8.9 + - - +
41B PHE* 1.3 84.3 - - + +
43B GLU* 1.3 64.1 - - - +
44B SER* 3.2 3.4 - - - +
45B PHE* 3.1 50.2 + + + +
48B LEU* 3.8 16.8 - - + +
63B HIS* 3.5 29.4 - + - -
750B HEM 3.8 55.2 - + + -
751B OXY 4.3 1.6 - - - -
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Residues in contact with GLU 43 (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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39B GLN 3.3 4.1 + - - -
40B ARG* 3.9 32.9 + - - +
41B PHE 3.5 2.2 + - - -
42B PHE* 1.3 77.2 - - - +
44B SER* 1.4 61.3 + - - +
45B PHE 3.2 0.7 + - - -
46B GLY* 3.7 12.5 + - - +
48B LEU* 5.4 2.1 - - - +
92C ARG* 2.8 36.6 + - - +
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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