Contacts of the helix formed by residues 278 - 282 (chain D) in PDB entry 1SHZ
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 ASN 278 (chain D).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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234D PHE* 6.1 0.2 - - - -
237D PHE* 4.2 22.4 - - - -
274D SER* 3.9 2.1 + - - +
275D ILE* 3.1 21.0 + - - +
276D CYS 3.4 2.4 + - - +
277D ASN* 1.3 77.1 - - - +
279D LYS* 1.3 69.2 + - - +
280D TRP* 3.0 35.6 - - - -
281D PHE* 2.9 28.1 + - + +
282D THR* 3.7 4.2 + - - +
68F LEU* 3.6 13.9 - - - +
69F GLN* 3.7 19.0 - - - +
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Residues in contact with LYS 279 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
277D ASN 5.1 3.8 - - - +
278D ASN* 1.3 74.6 + - - +
280D TRP* 1.3 62.0 + - - +
281D PHE 3.0 0.4 + - - -
282D THR* 3.0 41.6 + - + +
335D ARG* 6.0 6.5 - - - +
67F ALA 3.9 5.9 + - - -
68F LEU* 3.2 29.2 + - + +
69F GLN 4.9 7.2 - - - -
70F PHE 3.5 25.5 + - - -
71F GLU* 4.5 9.1 + - - -
72F PRO* 5.6 1.2 - - - +
207F THR* 3.6 24.8 - - - +
208F ILE 4.0 15.9 + - - +
209F SER* 5.4 7.8 + - - +
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Residues in contact with TRP 280 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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237D PHE* 3.4 39.8 - + + +
238D GLU* 3.7 27.6 - - + -
240D VAL* 5.7 0.5 - - - +
278D ASN* 3.0 32.4 + - - +
279D LYS* 1.3 78.0 - - - +
281D PHE* 1.3 71.5 + - + +
282D THR* 3.5 0.6 + - - -
283D ASP 5.2 0.5 + - - -
284D THR* 3.9 4.9 + - - -
64F GLN* 4.8 6.0 + - - +
68F LEU* 3.3 31.2 - - + +
204F MET* 3.6 43.7 - - + -
207F THR* 4.2 34.1 - - + +
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Residues in contact with PHE 281 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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52D LEU* 5.0 0.2 - - + -
237D PHE* 3.6 49.4 - + + -
240D VAL* 4.1 16.6 - - + -
243D ILE* 3.2 34.3 - - + -
275D ILE* 3.4 38.8 - - + -
276D CYS 5.9 0.2 - - - -
278D ASN* 2.9 25.9 + - + +
280D TRP* 1.3 83.0 - - + +
282D THR* 1.3 62.2 + - - +
283D ASP 3.1 3.7 + - - -
284D THR* 3.2 28.1 + - + -
286D ILE* 4.3 13.7 - - + -
339D LYS* 3.0 18.5 + - - -
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Residues in contact with THR 282 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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278D ASN 4.4 1.1 - - - +
279D LYS* 3.0 51.0 + - + +
280D TRP 3.5 1.1 + - - -
281D PHE* 1.3 78.2 - - - +
283D ASP* 1.3 76.5 + - - +
338D THR* 5.3 7.6 - - - +
339D LYS* 3.5 18.9 + - - +
209F SER* 6.5 0.7 - - - -
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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