Contacts of the strand formed by residues 54 - 57 (chain K) in PDB entry 1IA0
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 TYR 54 (chain K).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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7K LYS* 4.6 15.8 + - + -
8K VAL 3.4 1.4 + - - -
9K ALA* 3.3 4.8 - - + -
10K VAL 3.1 22.7 + - - -
33K SER* 4.9 2.7 - - - -
52K PHE* 3.1 9.2 - - - +
53K ASP* 1.3 102.1 - - + +
55K SER* 1.3 61.8 + - - +
56K TYR* 3.4 34.5 - + + -
76K ASP* 3.7 35.2 + - + +
77K ILE* 3.5 38.4 - - + -
80K GLU* 4.8 1.7 + - - -
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Residues in contact with SER 55 (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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10K VAL* 3.7 11.2 - - - +
30K MET* 3.6 11.1 - - - +
32K GLY 3.9 13.0 + - - +
33K SER* 2.9 36.3 + - - +
34K THR 3.6 7.8 - - - -
35K THR* 2.6 27.9 + - - -
52K PHE* 3.8 2.6 - - - -
54K TYR* 1.3 73.5 + - - +
56K TYR* 1.3 63.1 + - - +
57K TRP* 3.6 3.8 + - - +
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Residues in contact with TYR 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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9K ALA* 3.8 24.2 - - + -
10K VAL 2.9 20.7 + - - +
11K ARG* 3.7 17.9 - - + +
12K VAL 3.2 25.5 + - - -
30K MET* 3.2 6.5 - - - +
54K TYR* 3.4 22.3 - + + -
55K SER* 1.3 72.5 - - - +
57K TRP* 1.3 60.5 + - - +
58K SER 3.4 1.6 + - - -
68K ALA* 3.7 24.7 - - + -
72K GLN* 4.1 10.7 + - - -
73K VAL* 4.1 36.9 + - + -
76K ASP* 2.8 42.8 + - - +
77K ILE* 4.7 3.0 - - + +
328K VAL* 5.6 2.0 - - + -
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Residues in contact with TRP 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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12K VAL* 3.5 28.7 - - + -
26K CYS* 4.2 5.6 - - - -
28K ILE* 3.5 30.7 - - + -
29K GLN* 4.5 4.9 - - + -
30K MET* 3.5 26.7 - - + -
55K SER 3.6 2.9 + - - +
56K TYR* 1.3 70.9 - - - +
58K SER* 1.3 57.6 + - - +
59K HIS* 3.7 34.5 - + + -
60K THR* 4.2 23.5 + - + +
64K ASP* 5.0 2.0 + - - -
66K ASN* 3.3 34.1 - - + +
67K TYR* 3.5 2.8 - - - -
68K ALA* 2.9 23.1 + - - +
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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