Contacts of the helix formed by residues 66 - 72 (chain M) in PDB entry 1K73
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 VAL 66 (chain M).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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65M ASP* 1.3 70.3 - - - +
67M ARG* 1.3 66.0 + - - +
69M ILE* 3.0 11.7 + - + +
70M ASP* 2.8 27.0 + - + +
108M VAL* 3.8 17.5 - - + +
109M LEU 2.9 19.2 + - - +
110M GLY* 4.1 4.9 - - - -
111M ALA 3.4 22.4 - - - +
112M GLY 4.3 3.6 - - - +
113M GLN 4.1 4.0 - - - +
114M VAL* 3.9 25.4 - - + -
118M LEU* 5.5 1.7 - - + +
120M LEU* 4.7 3.6 - - + -
129M ALA* 4.3 10.5 - - + +
132M LYS* 4.5 2.5 - - + -
133M VAL* 4.2 21.8 - - + -
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Residues in contact with ARG 67 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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687A C 5.7 2.8 + - - -
688A A 3.9 18.3 + - - -
698A A 5.9 1.6 + - - -
700A A 4.2 24.1 + - - +
745A G 3.6 27.3 + - - +
65M ASP* 3.0 30.0 + - + +
66M VAL* 1.3 81.8 - - - +
68M GLU* 1.3 69.7 + - - +
70M ASP* 4.6 0.2 - - - -
71M GLU* 2.8 55.4 + - + +
111M ALA* 3.1 25.2 + - - +
112M GLY* 4.0 8.8 - - - +
113M GLN 4.1 11.0 - - - -
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Residues in contact with GLU 68 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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687A C 5.4 3.5 - - - +
745A G 5.7 1.1 - - - +
64M ILE* 3.6 28.6 - - + +
65M ASP 2.9 12.3 + - - +
67M ARG* 1.3 89.0 + - - +
69M ILE* 1.3 69.7 + - - +
71M GLU* 3.5 7.1 + - - -
72M ASN* 3.1 33.3 + - - +
96M VAL* 4.9 6.6 - - - +
97M VAL* 6.0 0.5 - - - -
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Residues in contact with ILE 69 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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64M ILE* 3.8 36.6 - - + -
65M ASP 4.0 3.1 - - - +
66M VAL* 3.0 14.3 + - + +
68M GLU* 1.3 79.1 - - - +
70M ASP* 1.3 59.0 - - - +
72M ASN* 2.9 16.8 + - - +
73M VAL* 3.3 15.1 + - + +
76M LEU* 4.7 12.4 - - + +
91M VAL* 3.9 26.5 - - + -
93M VAL* 4.4 7.6 - - + -
96M VAL* 5.1 9.0 - - + -
108M VAL* 4.3 10.3 - - + -
118M LEU* 4.5 11.0 - - + -
120M LEU* 4.1 31.0 - - + -
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Residues in contact with ASP 70 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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700A A 2.8 30.7 + - - +
66M VAL 2.8 16.5 + - - +
67M ARG 3.9 2.9 - - - +
69M ILE* 1.3 78.0 - - - +
71M GLU* 1.3 60.8 + - - +
72M ASN 3.0 1.2 + - - -
73M VAL* 3.4 25.5 - - - +
113M GLN 4.0 4.0 - - - +
114M VAL* 3.5 12.0 - - + +
115M ARG* 3.2 24.6 + - - +
116M HIS* 3.0 34.2 + - - +
118M LEU* 3.8 8.2 - - + +
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Residues in contact with GLU 71 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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700A A 3.0 46.5 - - + +
745A G 2.8 44.5 + - - -
67M ARG* 2.8 35.8 + - - +
68M GLU* 4.2 6.3 - - - +
69M ILE 3.3 0.4 - - - -
70M ASP* 1.3 73.1 - - - +
72M ASN* 1.3 71.2 + - - +
73M VAL* 3.7 0.7 - - - -
74M THR* 5.4 1.0 + - - -
75M LEU* 4.0 7.3 - - - +
68P GLY* 3.8 13.8 + - - -
69P VAL* 4.0 22.6 - - + +
88P LYS* 5.4 1.4 + - - -
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Residues in contact with ASN 72 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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68M GLU* 3.1 33.4 + - - +
69M ILE 2.9 7.6 + - - +
71M GLU* 1.3 91.4 + - - +
73M VAL* 1.3 58.5 + - - +
74M THR* 3.5 2.2 - - - -
75M LEU* 3.1 32.9 + - + +
76M LEU* 3.0 38.2 + - + +
88P LYS* 4.4 8.1 + - - -
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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