Contacts of the helix formed by residues 590 - 595 (chain A) in PDB entry 1XSK
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 ALA 590 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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172A LEU* 4.8 11.0 - - + -
498A LEU* 3.9 25.6 + - + +
502A LEU* 4.1 25.4 - - + -
588A MET 4.3 0.4 + - - -
589A ARG* 1.3 76.8 - - - +
591A MET* 1.3 66.7 + - - +
592A MET* 4.1 19.3 - - + -
593A MET* 3.0 23.5 + - + +
594A GLU* 3.4 4.3 + - - +
604A LEU 5.1 0.9 - - - +
608A TYR* 5.1 0.9 - - - +
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Residues in contact with MET 591 (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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589A ARG 3.5 0.8 + - - -
590A ALA* 1.3 72.4 - - - +
592A MET* 1.3 58.9 + - - +
594A GLU* 3.0 3.2 + - - +
595A PHE* 2.8 40.2 + - + +
601A CYS* 4.0 9.0 - - + -
604A LEU* 3.9 31.6 + - + -
607A GLN* 3.2 49.1 + - + +
608A TYR 3.9 13.2 - - - -
609A MET* 3.7 22.2 - - - -
615A MET* 4.1 8.3 - - + -
629A TYR 4.1 0.7 - - - +
631A PRO* 3.7 35.9 - - + -
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Residues in contact with MET 592 (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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163A TYR* 3.5 52.3 - - + +
172A LEU* 5.8 0.9 - - + -
201A MET* 5.4 2.0 - - + -
202A THR 4.5 2.2 - - - +
203A ASN* 4.1 21.3 - - + +
247A PRO* 4.1 15.4 - - + +
502A LEU* 4.0 22.4 - - + -
590A ALA* 4.1 10.7 - - + +
591A MET* 1.3 77.3 - - - +
593A MET* 1.3 79.6 + - - +
595A PHE 4.4 2.5 - - - -
596A PRO* 3.1 32.2 - - + +
601A CYS* 3.6 29.0 + - - +
602A ASP* 4.6 4.9 - - - +
604A LEU 5.7 0.2 + - - -
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Residues in contact with MET 593 (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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246A THR* 6.0 0.2 - - - -
247A PRO* 4.1 20.3 - - + +
248A LYS* 4.0 31.9 - - + +
251A LEU* 3.7 20.9 - - + -
498A LEU 5.6 0.7 - - - +
501A GLY* 4.2 3.1 - - - +
502A LEU* 3.7 27.8 - - + -
585A THR* 4.6 0.9 - - - -
586A PRO* 3.8 32.3 - - + -
588A MET 5.3 0.2 - - - +
589A ARG* 3.8 19.3 - - + -
590A ALA* 3.0 22.0 + - + +
592A MET* 1.3 93.8 - - - +
594A GLU* 1.3 60.7 + - - +
596A PRO* 3.6 8.7 - - - +
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Residues in contact with GLU 594 (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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248A LYS* 3.1 25.1 + - - +
589A ARG* 2.8 34.1 + - + -
590A ALA 3.4 3.7 + - - +
591A MET 3.0 3.3 + - - +
593A MET* 1.3 78.1 - - - +
595A PHE* 1.3 93.6 + - + +
596A PRO* 3.1 9.0 - - - +
609A MET* 3.8 19.5 - - + -
611A GLY 4.5 0.6 - - - +
612A ASP* 3.9 17.4 - - - +
664A ARG* 3.6 17.7 + - - -
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Residues in contact with PHE 595 (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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591A MET* 2.8 20.7 + - + +
592A MET* 3.5 4.9 - - - +
594A GLU* 1.3 104.1 - - + +
596A PRO* 1.3 64.4 - - - +
597A ASP 3.1 4.5 + - - -
598A ASP* 3.1 23.0 + - + +
601A CYS* 4.1 16.2 - - - +
609A MET* 3.9 16.8 - - + -
631A PRO* 3.3 37.2 - - + -
632A GLU 5.3 2.0 - - - -
635A TRP* 3.7 24.7 - + - -
664A ARG* 3.7 33.4 - - - -
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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
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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