Contacts of the helix formed by residues 646 - 653 (chain B) in PDB entry 2XOY
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 646 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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643B THR* 3.1 20.6 + - - +
644B GLN 3.1 1.5 - - - -
645B VAL* 1.3 97.3 - - + +
647B ALA* 1.3 64.6 + - - +
648B HIS* 3.2 4.3 - - + +
649B HIS* 3.1 10.5 + - + +
650B ALA* 3.0 19.9 + - - +
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Residues in contact with ALA 647 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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554B SER* 4.9 13.0 - - - +
555B TYR* 5.0 4.6 - - + +
645B VAL 4.0 3.0 + - - -
646B LYS* 1.3 71.4 - - - +
648B HIS* 1.3 63.3 + - - +
650B ALA* 3.9 7.4 - - - +
651B MET* 3.0 25.3 + - - +
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Residues in contact with HIS 648 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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646B LYS* 3.2 2.5 - - + +
647B ALA* 1.3 79.5 - - - +
649B HIS* 1.3 61.4 + - + +
651B MET* 3.4 23.0 + - + +
652B LYS* 3.1 38.5 + - + +
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Residues in contact with HIS 649 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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635B CYS* 4.0 4.5 - - - -
641B CYS* 3.3 1.6 - - - -
643B THR* 3.7 43.1 + - + +
644B GLN* 3.7 1.1 - - - -
646B LYS* 3.1 10.3 + - + +
648B HIS* 1.3 80.9 - - + +
650B ALA* 1.3 64.6 + - - +
651B MET 3.1 1.3 - - - -
652B LYS* 3.2 3.8 + - - +
653B PHE* 3.0 56.9 + + - +
655B HIS* 3.1 17.5 + + - -
995B ZN 2.1 38.0 - - - -
1666B ADE 4.4 9.8 - + - -
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Residues in contact with ALA 650 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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553B ASN* 3.4 28.7 + - - +
554B SER* 5.6 0.7 - - - +
555B TYR* 3.4 14.4 - - + +
556B GLU* 4.5 1.9 - - - +
632B ARG* 3.0 24.3 + - - -
644B GLN 3.5 17.9 - - - +
646B LYS 3.0 11.5 + - - +
647B ALA* 3.9 7.0 - - - +
649B HIS* 1.3 76.5 - - - +
651B MET* 1.3 57.1 + - - +
653B PHE 3.1 4.7 - - - +
655B HIS* 4.3 11.4 - - - -
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Residues in contact with MET 651 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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648A HIS* 5.4 8.1 - - - -
652A LYS* 4.2 22.0 - - - +
555B TYR* 3.8 31.7 + - + +
632B ARG* 2.9 27.2 + - - +
647B ALA 3.0 17.6 + - - +
648B HIS* 3.6 23.8 - - + +
649B HIS 3.1 0.2 - - - -
650B ALA* 1.3 77.6 - - - +
652B LYS* 1.3 86.3 + - + +
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Residues in contact with LYS 652 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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632B ARG* 4.0 6.0 - - - +
633B PRO* 3.8 23.8 - - + +
648B HIS* 3.1 25.9 + - + +
649B HIS* 3.2 4.9 + - - +
651B MET* 1.3 95.6 - - + +
653B PHE* 1.3 89.3 + - + +
1666B ADE 5.8 1.6 + - - -
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Residues in contact with PHE 653 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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556B GLU* 4.0 0.2 - - - +
632B ARG* 2.8 20.2 + - - -
633B PRO* 3.4 36.8 - - + -
634B ASP 4.6 0.4 - - - -
635B CYS* 3.9 16.6 - - + -
649B HIS* 3.0 42.0 + + - +
650B ALA 3.1 7.6 - - - +
651B MET 3.3 0.2 - - - -
652B LYS* 1.3 109.9 - - + +
654B ASN* 1.3 62.5 + - - +
655B HIS* 3.3 18.8 + - + -
1666B ADE 3.4 50.9 - + - -
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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