Contacts of the helix formed by residues 26 - 34 (chain L) 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 L).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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25L ILE* 1.3 75.7 - - - +
27L LYS* 1.3 58.9 + - - +
28L SER* 2.9 22.8 + - - +
29L GLU* 2.9 26.2 + - - +
30L ALA* 2.9 27.9 + - - +
51L ILE* 4.4 1.6 - - - -
52L GLY 3.5 16.2 - - - +
53L GLY* 4.7 9.6 - - - +
54L ASP* 3.8 15.7 - - - +
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Residues in contact with LYS 27 (chain L).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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2A G 2.7 36.7 + - - +
3A A 2.7 30.0 + - - -
4A C 5.3 0.4 + - - -
26L THR* 1.3 73.3 - - - +
28L SER* 1.3 53.2 + - - +
30L ALA* 3.2 5.9 + - - +
31L GLN* 2.7 53.4 + - - +
35L TRP* 4.0 18.0 - - + -
51L ILE* 3.7 14.3 - - + +
54L ASP* 2.9 26.8 + - - +
73L GLU* 5.4 0.9 - - - -
83L ARG* 3.6 20.1 - - - +
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Residues in contact with SER 28 (chain L).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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26L THR* 2.9 18.7 + - - +
27L LYS* 1.3 79.4 - - - +
29L GLU* 1.3 58.9 + - - +
31L GLN* 3.4 13.1 + - - +
32L ALA* 3.0 28.2 + - - +
54L ASP* 4.9 2.4 + - - -
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Residues in contact with GLU 29 (chain L).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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24L TYR 4.6 0.7 - - - +
25L ILE* 3.3 22.8 - - + +
26L THR* 2.9 42.7 + - - +
28L SER* 1.3 75.2 - - - +
30L ALA* 1.3 66.3 + - - +
32L ALA* 3.1 10.5 + - - +
33L LEU* 3.1 27.0 + - + +
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Residues in contact with ALA 30 (chain L).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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25L ILE* 3.7 16.9 - - + +
26L THR 2.9 11.3 + - - +
27L LYS 3.6 4.0 - - - +
29L GLU* 1.3 77.0 - - - +
31L GLN* 1.3 57.4 + - - +
33L LEU* 3.0 20.6 + - - +
34L GLY 3.3 0.5 + - - -
35L TRP* 3.0 35.1 + - + +
42L LEU* 4.0 3.4 - - + -
45L VAL* 4.6 0.3 - - - +
51L ILE* 3.3 34.1 - - + -
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Residues in contact with GLN 31 (chain L).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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27L LYS* 2.7 35.3 + - - +
28L SER* 3.7 12.3 - - - +
30L ALA* 1.3 72.6 - - - +
32L ALA* 1.3 61.6 + - - +
34L GLY* 3.2 13.5 + - - -
35L TRP* 3.8 40.0 + - + +
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Residues in contact with ALA 32 (chain L).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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28L SER 3.0 15.4 + - - +
29L GLU* 3.3 13.5 - - - +
31L GLN* 1.3 77.3 - - - +
33L LEU* 1.3 66.0 + - + +
34L GLY 3.5 0.5 + - - -
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Residues in contact with LEU 33 (chain L).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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25L ILE* 4.0 19.3 - - + -
29L GLU* 3.1 14.0 + - + +
30L ALA 3.0 9.9 + - - +
32L ALA* 1.3 82.7 - - + +
34L GLY* 1.3 56.8 + - - +
35L TRP 3.6 0.2 - - - -
45L VAL* 3.5 30.4 - - + +
46L ALA* 3.9 24.9 - - + -
49L LYS* 5.8 1.1 - - + -
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Residues in contact with GLY 34 (chain L).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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31L GLN 3.2 10.1 + - - -
32L ALA 3.2 2.0 + - - -
33L LEU* 1.3 79.5 - - - +
35L TRP* 1.3 63.3 - - - +
36L VAL* 3.5 8.7 + - - +
41L ASN* 3.1 19.8 + - - -
45L VAL* 3.5 10.0 - - - +
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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