Contacts of the helix formed by residues 55 - 62 (chain K) in PDB entry 4PHZ
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 55 (chain K).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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52K ASP* 3.5 28.7 + - + +
53K SER 3.5 0.8 - - - -
54K PHE* 1.3 81.6 - - - +
56K PRO* 1.4 69.5 - - + +
57K GLU* 3.4 20.9 - - + +
58K PHE* 3.3 19.6 + - - +
59K GLN* 3.6 8.1 + - - -
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Residues in contact with PRO 56 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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54K PHE 4.4 2.2 - - - +
55K ALA* 1.4 83.5 - - + +
57K GLU* 1.3 75.0 + - - +
58K PHE 3.1 2.5 - - - -
59K GLN* 3.4 15.3 + - + +
60K THR* 3.3 27.5 + - + +
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Residues in contact with GLU 57 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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49K ALA* 4.1 17.8 - - + +
55K ALA* 3.2 21.4 - - + +
56K PRO* 1.3 86.7 - - - +
58K PHE* 1.3 63.1 + - - +
60K THR* 3.7 7.9 - - - +
61K TYR* 3.1 43.3 + - + +
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Residues in contact with PHE 58 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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49K ALA 3.5 18.7 + - - +
50K GLY* 4.0 7.4 - - - -
52K ASP 3.5 12.8 - - - +
53K SER* 3.6 37.9 - - - -
55K ALA* 3.3 15.6 + - - +
56K PRO 3.1 0.8 - - - -
57K GLU* 1.3 77.2 - - - +
59K GLN* 1.3 62.1 + - - +
62K TRP* 2.9 48.4 + + + +
63K MET* 3.0 34.4 + - + -
140K THR* 4.8 2.5 - - + -
142K PHE 3.0 29.4 - - - -
143K THR* 4.4 4.3 - - - -
144K PRO* 4.0 17.5 - - + -
147K ILE* 4.4 2.5 - - + -
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Residues in contact with GLN 59 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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53K SER 3.7 16.6 + - - -
54K PHE 5.2 1.8 + - - -
55K ALA 3.6 12.7 + - - -
56K PRO* 3.5 20.4 - - + +
58K PHE* 1.3 83.7 - - - +
60K THR* 1.3 64.9 + - + +
63K MET* 3.7 26.1 - - + +
64K SER* 3.2 25.3 + - - -
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Residues in contact with THR 60 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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56K PRO* 3.3 15.0 + - + +
57K GLU* 3.5 7.1 + - - +
58K PHE 3.3 0.2 - - - -
59K GLN* 1.3 81.0 - - + +
61K TYR* 1.3 93.2 + - - +
64K SER* 3.6 14.8 + - - -
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Residues in contact with TYR 61 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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41K TYR* 2.6 31.8 + + - +
45K PHE* 3.3 47.1 - + + -
49K ALA* 4.3 6.1 - - + -
57K GLU* 3.1 40.0 + - + +
60K THR* 1.3 101.9 - - - +
62K TRP* 1.3 74.1 + - + +
64K SER* 4.1 4.9 - - - -
65K ILE* 3.5 10.9 - - - +
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Residues in contact with TRP 62 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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41K TYR* 3.8 18.8 - + - -
42K GLU* 3.4 31.6 - - + -
45K PHE* 2.7 41.7 + - + +
46K GLY* 3.8 4.7 - - - -
49K ALA 3.8 20.6 - - - -
50K GLY* 3.8 10.7 - - - -
58K PHE* 2.9 30.4 + + + +
60K THR 3.9 0.2 - - - -
61K TYR* 1.3 90.7 - - + +
63K MET* 1.3 59.8 + - - +
64K SER 3.2 3.8 - - - -
65K ILE* 3.3 23.3 + - + +
66K LEU 3.4 4.9 + - - -
144K PRO* 3.9 34.5 - - + -
147K ILE* 3.3 29.5 - - + +
148K ILE* 4.1 23.3 - - + -
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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