Contacts of the helix formed by residues 103 - 107 (chain A) in PDB entry 3IZ0
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 103 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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102A ASN* 1.3 66.8 - - - +
104A ALA* 1.3 77.9 + - - +
106A GLY* 2.6 17.5 + - - -
107A HIS* 2.8 34.6 + - + -
108A TYR* 4.1 5.4 - + - -
144A GLY 4.6 0.7 - - - -
147A SER* 3.8 14.6 + - - +
148A GLY* 3.3 23.3 - - - -
151A SER* 3.3 22.9 - - - -
186A ASN* 2.5 22.0 + - - +
189A LEU* 3.1 58.4 + - + -
193A THR* 3.9 7.1 + - - -
408A TYR* 3.1 8.1 - - + -
413A MET* 3.4 25.8 - - + -
417A GLU* 3.8 13.9 + - - -
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Residues in contact with ALA 104 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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103A TYR* 1.3 83.1 - - - +
105A ARG* 1.3 60.0 + - - +
108A TYR* 2.6 36.6 + - - +
408A TYR* 3.1 37.3 - - + +
411A GLU* 3.9 4.9 - - + -
413A MET* 3.0 37.5 - - + -
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Residues in contact with ARG 105 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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97A GLU* 5.1 0.2 - - - +
98A ASP* 3.0 44.0 + - - +
100A ALA* 3.1 29.3 - - + +
102A ASN* 2.8 24.7 + - - +
103A TYR 2.9 1.4 + - - -
104A ALA* 1.3 79.5 - - - +
106A GLY* 1.3 57.9 + - - +
108A TYR 3.7 0.2 - - - +
109A THR* 3.5 26.6 - - + +
110A ILE* 2.6 56.8 + - + +
111A GLY 3.1 0.2 + - - -
411A GLU* 3.7 27.1 + - - +
253B ARG* 4.1 17.9 - - - +
257B VAL* 6.2 1.1 - - - -
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Residues in contact with GLY 106 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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70A LEU* 4.2 9.2 - - - -
99A ALA 4.8 2.4 + - - -
102A ASN 3.2 4.2 + - - -
103A TYR 2.6 13.0 + - - -
105A ARG* 1.3 76.7 - - - +
107A HIS* 1.3 54.6 + - - +
110A ILE* 3.8 9.0 - - - -
111A GLY* 2.7 26.6 - - - -
144A GLY 3.9 15.7 - - - -
149A PHE* 3.4 17.5 + - - +
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Residues in contact with HIS 107 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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103A TYR* 2.8 28.4 + - + +
104A ALA 3.8 1.8 - - - +
106A GLY* 1.3 75.8 - - - +
108A TYR* 1.3 107.5 + + + +
112A LYS* 3.4 4.3 + - - +
148A GLY* 3.4 19.5 + - - -
149A PHE* 3.7 3.0 - - - +
151A SER* 3.1 24.9 - - - -
152A LEU* 3.4 57.2 + - + +
155A GLU* 5.4 2.9 - - + -
193A THR* 4.0 7.6 - - - -
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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