Contacts of the helix formed by residues 101 - 106 (chain K) in PDB entry 2AAZ
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 TRP 101 (chain K).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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79K GLU* 2.9 24.6 + - - -
82K TRP* 3.7 13.6 - + - -
83K PHE* 4.7 0.2 - - - -
90K ALA* 4.0 21.8 - - + +
93K LEU* 3.7 22.2 - - + +
98K VAL 5.1 0.6 + - - -
99K GLY* 3.1 1.2 - - - -
100K ILE* 1.3 99.9 - - + +
102K ASP* 1.3 66.8 + - - +
103K GLY 3.2 2.2 - - - -
104K ASN* 3.6 26.7 + - + +
105K GLY* 3.1 21.0 + - - -
123K LEU* 3.9 23.2 - - + +
126K VAL* 6.2 4.7 - - + -
127K TYR* 3.6 34.5 - + - -
183K ALA* 6.1 0.7 - - + -
184K LEU* 4.1 35.4 - - + -
450K UMP 4.8 11.4 - + - -
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Residues in contact with ASP 102 (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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90K ALA* 4.6 7.5 - - - +
93K LEU* 5.9 0.2 - - - +
94K SER* 3.5 24.2 - - - -
98K VAL 4.3 0.9 - - - +
99K GLY* 3.0 33.2 + - - +
101K TRP* 1.3 80.5 + - - +
103K GLY* 1.3 57.4 + - - +
105K GLY* 5.0 1.3 - - - -
106K SER* 3.0 32.4 + - - -
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Residues in contact with GLY 103 (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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99K GLY 4.4 1.4 + - - -
100K ILE 4.7 2.0 + - - -
101K TRP* 3.2 1.4 - - - +
102K ASP* 1.3 79.7 - - - +
104K ASN* 1.3 58.9 + - - +
105K GLY 3.2 0.2 - - - -
106K SER* 3.2 21.4 + - - -
109K PHE* 3.6 8.8 - - - +
315K MET* 4.5 15.9 - - - -
317K ALA* 4.7 9.1 - - - +
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Residues in contact with ASN 104 (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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100K ILE 5.1 1.6 - - - +
101K TRP* 3.6 27.7 + - + +
102K ASP 3.4 0.4 - - - -
103K GLY* 1.3 74.3 - - - +
105K GLY* 1.3 59.6 + - - +
106K SER 3.5 0.4 - - - -
109K PHE* 3.3 49.1 - - + -
110K LEU* 3.8 4.0 - - - +
123K LEU* 3.8 4.5 - - + -
183K ALA* 3.5 18.5 - - + +
184K LEU* 3.8 28.7 - - + +
315K MET* 3.4 22.2 - - - +
317K ALA* 3.6 15.4 + - - +
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Residues in contact with GLY 105 (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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90K ALA* 5.1 0.4 - - - -
101K TRP 3.1 14.2 + - - -
102K ASP* 3.7 2.7 - - - -
104K ASN* 1.3 77.1 - - - +
106K SER* 1.3 67.4 + - - +
110K LEU* 3.5 8.0 - - - +
120K GLU* 3.3 2.9 - - - +
121K GLY* 2.7 35.7 + - - -
123K LEU* 3.5 17.5 - - - -
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Residues in contact with SER 106 (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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102K ASP 3.0 16.7 + - - -
103K GLY* 3.2 14.6 + - - -
104K ASN 3.5 0.4 - - - -
105K GLY* 1.3 80.6 - - - +
107K LYS* 1.3 64.6 + - - +
108K GLU* 3.0 10.7 + - - +
109K PHE* 3.2 14.7 + - - +
110K LEU* 3.1 20.1 + - - +
120K GLU* 3.7 12.6 - - - -
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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