Contacts of the helix formed by residues 495 - 500 (chain A) in PDB entry 2X96
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 LYS 495 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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263A TRP* 3.6 36.4 - - + +
265A GLN* 2.8 23.0 + - - +
337A HIS* 4.9 4.0 - - - -
444A PHE* 4.0 6.7 - - + -
448A MET* 4.1 19.7 - - + -
469A PHE* 5.9 2.5 - - + -
491A ASP 4.5 0.4 + - - -
492A ALA 3.2 12.4 + - - +
493A PRO 2.9 4.0 - - - +
494A ALA* 1.3 77.6 - - - +
496A TYR* 1.3 70.8 + - - +
497A HIS* 3.7 21.0 + - + +
498A ILE* 2.9 25.0 + - + +
499A SER 3.3 8.3 + - - -
504A TYR* 3.9 10.8 - - + -
1615A RX3 2.7 34.3 + - - -
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Residues in contact with TYR 496 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
124A GLU* 2.6 35.9 + - + -
127A PHE* 3.6 48.2 - + + -
263A TRP* 5.0 2.7 - - + +
335A VAL* 3.7 13.6 - - + +
337A HIS* 3.5 55.5 + + + +
495A LYS* 1.3 76.6 - - + +
497A HIS* 1.3 70.8 + + - +
498A ILE 3.1 0.7 + - - -
499A SER* 3.1 4.9 + - - -
500A ALA* 2.8 45.0 + - + +
502A VAL* 4.8 2.7 - - + -
1615A RX3 3.7 31.6 - + - -
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Residues in contact with HIS 497 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
337A HIS* 3.5 16.4 + + - -
452A ARG* 3.2 7.0 + - - +
495A LYS* 3.1 12.5 + - + -
496A TYR* 1.3 81.9 - + - +
498A ILE* 1.3 57.9 + - + +
500A ALA* 3.8 1.3 - - - +
501A ASP 3.0 6.4 + - - -
502A VAL* 2.9 60.5 + - + +
504A TYR* 3.6 21.6 - + + -
507A TYR* 3.1 29.6 + + - -
1615A RX3 2.8 53.2 + - + +
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Residues in contact with ILE 498 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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123A MET* 4.8 1.2 - - - +
181A PHE* 3.4 41.8 - - + -
184A TYR* 4.8 3.1 - - - -
448A MET* 3.9 30.7 - - + +
451A TYR* 4.8 3.1 - - + -
452A ARG* 3.8 30.0 + - + +
469A PHE* 4.3 7.4 - - + -
492A ALA* 3.3 47.8 - - + +
493A PRO* 3.8 2.9 - - + -
495A LYS* 2.9 10.7 + - + +
497A HIS* 1.3 77.5 - - + +
499A SER* 1.3 64.5 + - - +
500A ALA 3.5 0.2 + - - -
501A ASP* 3.6 9.0 + - - -
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Residues in contact with SER 499 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
120A LEU* 4.4 2.9 - - - +
123A MET* 3.3 54.1 + - - +
124A GLU* 4.0 4.2 + - - -
126A ASN* 5.7 0.3 + - - -
127A PHE* 4.2 14.2 - - - +
173A ALA 3.9 4.5 + - - -
177A VAL* 4.4 4.7 - - - +
493A PRO* 2.7 38.0 + - - +
495A LYS 3.3 2.8 + - - -
496A TYR* 3.1 7.0 + - - -
498A ILE* 1.3 78.2 - - - +
500A ALA* 1.3 60.3 + - - +
501A ASP 3.4 0.9 + - - -
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Residues in contact with ALA 500 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
120A LEU* 5.3 3.4 - - - +
124A GLU* 3.8 22.5 - - + +
496A TYR* 2.8 49.1 + - + +
499A SER* 1.3 76.2 - - - +
501A ASP* 1.3 72.6 + - - +
502A VAL* 3.4 14.1 + - + +
1615A RX3 5.9 0.7 - - + -
1616A EPE 3.8 5.4 + - - -
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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