Contacts of the helix formed by residues 26 - 34 (chain M) in PDB entry 1BRN
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 THR 26 (chain M).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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25M ILE* 1.3 76.7 - - - +
27M LYS* 1.3 59.9 + - - +
28M SER* 3.0 21.6 + - - -
29M GLU* 2.9 28.5 + - - +
30M ALA* 2.9 27.4 + - - +
51M ILE* 4.4 1.3 - - - -
52M GLY 3.5 15.9 - - - +
53M GLY* 4.5 10.8 - - - +
54M ASP* 3.8 16.4 - - - +
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Residues in contact with LYS 27 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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2B G 2.8 35.2 + - - +
3B A 2.7 30.4 + - - -
4B C 5.2 0.8 + - - -
26M THR* 1.3 71.6 - - - +
28M SER* 1.3 58.5 + - - +
30M ALA* 3.1 5.4 + - - +
31M GLN* 2.8 43.7 + - - +
35M TRP* 3.9 21.2 - - + -
51M ILE* 3.6 14.5 - - + +
54M ASP* 2.9 27.8 + - - +
73M GLU* 5.4 1.1 - - - -
83M ARG* 3.6 19.3 - - - +
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Residues in contact with SER 28 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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26M THR* 3.0 16.2 + - - -
27M LYS* 1.3 79.1 - - - +
29M GLU* 1.3 59.5 + - - +
31M GLN* 3.4 13.2 + - - +
32M ALA* 3.0 27.9 + - - +
54M ASP* 4.9 1.6 + - - -
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Residues in contact with GLU 29 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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24M TYR 4.6 0.9 - - - +
25M ILE* 3.3 23.8 - - + +
26M THR* 2.9 40.4 + - - +
28M SER* 1.3 84.5 + - - +
30M ALA* 1.3 63.2 + - - +
32M ALA* 3.2 15.4 + - - +
33M LEU* 3.2 19.7 + - + +
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Residues in contact with ALA 30 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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25M ILE* 3.7 15.7 - - + +
26M THR 2.9 11.2 + - - +
27M LYS 3.1 4.5 + - - +
29M GLU* 1.3 73.6 - - - +
31M GLN* 1.3 65.1 + - - +
33M LEU* 2.9 17.0 + - - +
34M GLY 3.3 0.2 + - - -
35M TRP* 3.1 36.0 + - + +
42M LEU* 4.1 2.2 - - + -
51M ILE* 3.3 35.0 - - + -
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Residues in contact with GLN 31 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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27M LYS* 2.8 29.0 + - - +
28M SER* 3.7 12.8 - - - +
30M ALA* 1.3 76.2 - - - +
32M ALA* 1.3 62.0 + - - +
34M GLY* 3.1 13.9 + - - -
35M TRP* 3.7 37.7 + - + +
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Residues in contact with ALA 32 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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28M SER 3.0 13.9 + - - +
29M GLU* 3.4 13.2 - - - +
30M ALA 3.1 0.2 - - - -
31M GLN* 1.3 79.5 - - - +
33M LEU* 1.3 63.2 + - + +
34M GLY* 3.2 1.0 + - - -
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Residues in contact with LEU 33 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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25M ILE* 3.9 10.3 - - + -
29M GLU* 3.4 11.4 - - + +
30M ALA* 2.9 9.4 + - - +
32M ALA* 1.3 80.5 - - + +
34M GLY* 1.3 57.5 + - - +
35M TRP 3.6 0.2 - - - -
45M VAL* 3.5 31.8 - - + +
46M ALA* 3.7 10.5 - - + -
49M LYS* 3.3 34.3 - - - -
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Residues in contact with GLY 34 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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31M GLN 3.1 10.9 + - - -
32M ALA 3.2 1.6 + - - -
33M LEU* 1.3 80.0 - - - +
35M TRP* 1.3 64.8 + - - +
36M VAL* 3.4 10.3 + - - +
41M ASN* 3.1 17.3 + - - -
45M VAL* 3.7 9.0 - - - +
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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