Contacts of the helix formed by residues 535 - 539 (chain A) in PDB entry 1XBC
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 PRO 535 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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493A ARG 4.4 0.4 - - - +
494A ASP* 3.3 23.6 - - - +
498A ARG* 3.3 24.2 - - - +
515A LEU* 4.4 4.0 - - + -
533A LYS 3.9 6.5 - - - +
534A TRP* 1.3 78.7 - - - +
536A VAL* 1.3 58.1 + - - +
537A LYS 3.3 2.7 - - - -
538A TRP* 2.9 37.0 + - + +
539A TYR* 3.5 37.3 + - + +
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Residues in contact with VAL 536 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
534A TRP* 2.9 28.1 + - + +
535A PRO* 1.3 70.6 - - - +
537A LYS* 1.3 59.8 + - + +
539A TYR* 2.8 33.4 + - - +
544A ILE* 3.8 26.8 - - + +
578A GLY* 4.3 30.1 - - - +
581A VAL* 5.5 6.5 - - + +
582A THR* 5.3 4.7 - - - +
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Residues in contact with LYS 537 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
535A PRO 3.2 1.2 + - - -
536A VAL* 1.3 78.0 - - + +
538A TRP* 1.3 79.0 + - + +
539A TYR 3.5 0.7 - - - -
556A TRP* 4.9 1.7 + - - -
560A VAL* 3.8 11.8 - - - +
571A LYS* 6.3 0.2 - - - +
572A PRO* 3.8 15.6 + - + +
573A TYR* 3.3 63.3 + - + -
574A ARG* 5.2 0.6 - - - +
575A GLY 4.8 2.6 - - - +
576A MET 2.9 30.9 + - - +
577A LYS 5.1 2.2 - - - -
578A GLY* 5.2 3.8 - - - +
581A VAL* 4.0 16.6 - - + +
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Residues in contact with TRP 538 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
494A ASP* 6.3 0.4 - - - -
495A LEU 3.4 26.9 - - - +
496A ALA* 3.3 11.0 - - + +
498A ARG* 3.2 29.2 - - - +
535A PRO* 2.9 27.5 + - + +
537A LYS* 1.3 101.6 - - + +
539A TYR* 1.3 62.7 + - + +
556A TRP* 3.6 5.8 - - - -
557A SER* 2.7 38.5 + - - +
560A VAL* 3.5 27.0 - - + +
564A GLU* 2.9 43.5 + - - -
571A LYS* 5.7 1.8 - - + -
572A PRO* 3.6 20.4 - - + -
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Residues in contact with TYR 539 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
493A ARG* 2.6 40.2 + - - +
494A ASP* 5.2 0.4 - - - -
495A LEU 6.0 0.4 - - - -
515A LEU* 3.9 8.7 - - - +
534A TRP* 3.7 43.0 - + + -
535A PRO* 3.6 31.3 - - + +
536A VAL* 2.8 17.7 + - - +
537A LYS 3.5 0.4 - - - -
538A TRP* 1.3 86.8 - - + +
540A ALA* 1.3 64.4 + - - +
543A CYS* 4.0 12.8 - - + -
544A ILE* 3.7 21.4 - - + +
549A PHE* 3.4 32.6 - + - -
553A SER 6.1 0.2 - - - -
556A TRP* 3.6 12.6 + - - -
557A SER* 4.5 6.3 - - - -
585A LEU* 5.2 5.5 - - - +
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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
------------------------------------------------------------
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