Contacts of the helix formed by residues 172 - 178 (chain K) in PDB entry 6K71
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 GLU 172 (chain K).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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154K LYS 5.6 1.4 - - - +
155K HIS* 5.0 9.2 + - - -
157K VAL* 3.4 28.9 - - - +
163K LEU* 4.1 8.7 - - + +
167K ASP 4.6 0.2 - - - -
168K LEU* 4.3 21.1 - - + -
169K ASN* 4.6 2.0 - - - -
171K ASP* 1.3 87.9 - - - +
173K ARG* 1.3 54.4 + - - +
174K GLU 3.5 0.4 - - - -
175K VAL* 2.7 59.0 + - + +
176K LEU* 3.0 17.0 + - + +
180K ILE* 3.7 9.8 - - - +
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Residues in contact with ARG 173 (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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117K GLU* 6.3 1.0 - - - +
169K ASN* 3.3 42.0 + - + +
170K GLU* 3.3 35.4 - - - +
171K ASP 3.9 0.4 - - - -
172K GLU* 1.3 72.9 - - - +
174K GLU* 1.3 78.2 + - - +
176K LEU* 3.3 3.1 + - - -
177K ILE* 3.0 42.1 + - + +
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Residues in contact with GLU 174 (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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114K HIS* 5.8 2.6 - - - -
115K VAL* 4.2 11.3 - - + +
117K GLU* 3.6 44.4 - - + +
118K VAL* 5.9 2.6 - - - +
169K ASN* 4.4 4.4 - - - +
172K GLU 3.1 0.8 + - - -
173K ARG* 1.3 99.3 + - + +
175K VAL* 1.3 58.8 + - + +
177K ILE* 3.2 35.2 - - - +
179K ASN* 2.4 32.7 + - - +
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Residues in contact with VAL 175 (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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111K ILE* 5.9 3.6 - - + -
112K LEU* 4.6 22.4 - - + -
115K VAL* 5.0 8.3 - - + -
134K THR* 6.1 3.1 - - + -
155K HIS* 5.6 7.4 - - + +
168K LEU* 5.4 6.3 - - + -
172K GLU* 2.7 41.9 + - + +
174K GLU* 1.3 83.5 - - + +
176K LEU* 1.3 52.3 + - - +
179K ASN* 2.9 24.0 + - + +
180K ILE* 2.5 42.9 + - + +
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Residues in contact with LEU 176 (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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157K VAL* 3.8 9.4 - - + -
171K ASP* 4.1 24.5 - - + +
172K GLU* 3.0 22.7 + - + +
173K ARG* 3.3 2.4 + - - +
175K VAL* 1.3 75.9 - - - +
177K ILE* 1.3 65.9 + - - +
178K ASN 3.5 0.2 - - - -
180K ILE* 2.6 54.6 - - + +
181K ASN* 4.0 20.2 + - - +
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Residues in contact with ILE 177 (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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173K ARG* 3.0 24.2 + - + +
174K GLU* 3.2 49.4 - - - +
176K LEU* 1.3 80.9 - - - +
178K ASN* 1.3 64.6 + - + +
179K ASN* 5.1 1.1 - - - +
181K ASN* 5.1 4.5 + - - +
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Residues in contact with ASN 178 (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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177K ILE* 1.3 83.4 - - + +
179K ASN* 1.3 60.3 + - - +
180K ILE 3.5 2.0 - - - -
181K ASN* 3.9 6.3 - - - +
182K ARG* 2.0 125.9 + - - +
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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