Contacts of the helix formed by residues 1709 - 1713 (chain I) in PDB entry 2BT4
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 ASN1709 (chain I).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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1708I SER* 1.3 71.8 - - - +
1710I ILE* 1.3 64.0 + - - +
1711I HIS* 2.9 30.7 + - - +
1712I GLN* 3.0 32.8 + - - +
1713I ARG* 3.5 7.6 - - - +
1731I ALA* 4.3 3.1 - - - -
1732I GLY* 3.5 19.9 - - - +
2123K SER 3.3 14.4 + - - -
2126K ALA 2.9 29.3 + - - -
2127K ASP 3.6 7.9 + - - +
2129K VAL* 3.9 13.7 - - - +
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Residues in contact with ILE1710 (chain I).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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1685I HIS* 4.5 6.5 - - + -
1706I HIS* 3.9 28.9 - - + +
1708I SER* 3.2 12.7 + - - +
1709I ASN* 1.3 73.0 + - - +
1711I HIS* 1.3 78.8 + - + +
1712I GLN 3.1 1.1 - - - -
1713I ARG* 3.2 19.2 + - - +
1717I ARG* 3.4 25.7 - - + +
1718I HIS* 3.2 29.9 - - - +
1720I SER* 5.0 7.9 - - - -
1731I ALA* 4.7 5.8 - - + +
1760I CA2 3.7 35.9 - - + +
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Residues in contact with HIS1711 (chain I).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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1709I ASN* 2.9 20.5 + - - +
1710I ILE* 1.3 93.4 - - + +
1712I GLN* 1.3 59.3 + - - +
1713I ARG 3.4 0.7 - - - -
1718I HIS* 3.6 39.9 + - - -
1729I VAL* 6.3 1.2 - - - +
1731I ALA* 4.7 7.3 - - + +
2111K HIS* 4.3 24.4 + + - -
2118K HIS 5.6 0.2 - - - -
2123K SER* 3.8 26.8 + - - +
2124K GLN* 4.3 15.1 - - + +
2129K VAL* 4.4 16.1 - - + +
2421K GOL 2.7 38.8 + - - +
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Residues in contact with GLN1712 (chain I).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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1709I ASN* 3.0 25.8 + - - +
1711I HIS* 1.3 77.3 - - - +
1713I ARG* 1.3 66.4 + - + +
2123K SER 3.8 8.1 - - - +
2124K GLN* 3.0 32.2 + - - +
2125K ARG* 3.6 7.5 + - - +
2126K ALA 3.2 23.5 + - - +
2127K ASP* 4.9 3.4 + - - +
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Residues in contact with ARG1713 (chain I).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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1624I GLN* 5.5 2.6 + - - -
1627I ILE* 4.5 19.2 - - - +
1628I TYR* 2.6 35.8 + - - -
1708I SER* 3.0 32.2 + - - -
1709I ASN 3.5 14.8 - - - +
1710I ILE* 3.2 13.3 + - - +
1711I HIS 3.4 0.2 - - - -
1712I GLN* 1.3 87.2 - - + +
1714I GLU* 1.3 82.3 + - - +
1715I PRO* 3.5 2.3 - - - +
1717I ARG* 4.1 28.1 - - + +
1718I HIS* 2.8 18.8 + - - -
1760I CA2 4.4 6.7 + - - +
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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