Contacts of the helix formed by residues 499 - 504 (chain A) in PDB entry 4RG7
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 SER 499 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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497A LEU 3.6 1.9 + - - -
498A PRO* 1.3 72.8 - - - +
500A HIS* 1.3 64.1 + - - +
502A TYR* 3.4 12.5 - - - +
503A ASN* 2.5 43.5 + - - -
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Residues in contact with HIS 500 (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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498A PRO* 3.2 2.5 + - + +
499A SER* 1.3 85.9 + - - +
501A HIS* 1.3 67.5 + - + +
502A TYR 3.2 1.0 + - - -
503A ASN* 3.8 13.1 + - - +
504A THR 3.9 8.0 + - - -
33B ALA* 3.8 27.6 - - - +
34B GLU* 4.8 5.8 - - - -
36B HIS* 3.1 37.0 + + - -
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Residues in contact with HIS 501 (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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471A LEU* 5.0 18.1 - - + +
497A LEU* 4.9 7.7 - - + +
498A PRO* 2.9 32.0 + - + +
500A HIS* 1.3 82.8 - - + +
502A TYR* 1.3 60.0 + - - +
504A THR* 3.1 17.5 - - - +
507A VAL* 3.2 13.9 - - - +
30B ARG* 3.4 58.3 + - + +
33B ALA* 3.9 5.6 - - + +
34B GLU* 2.2 40.2 + - - -
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Residues in contact with TYR 502 (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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494A LEU 3.8 16.6 - - - -
495A SER* 3.8 25.5 + - - -
497A LEU* 4.0 7.6 - - - +
498A PRO 2.8 10.7 + - - +
499A SER* 3.1 16.8 + - - +
501A HIS* 1.3 81.6 - - - +
503A ASN* 1.3 75.7 + - - +
504A THR 3.4 5.2 - - - +
507A VAL* 3.7 11.3 - - + +
508A LEU* 3.1 39.6 - - + +
511A ILE* 3.7 26.5 - - + +
527A ILE* 5.0 9.8 - - + +
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Residues in contact with ASN 503 (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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499A SER* 2.5 37.0 + - - +
500A HIS* 3.8 9.0 + - - +
502A TYR* 1.3 87.4 - - - +
504A THR* 1.3 67.5 + - - +
505A GLY 3.5 1.4 + - - -
508A LEU* 3.6 17.6 - - - +
530A GLU* 4.9 8.0 - - - +
534A ILE* 3.9 24.9 - - + +
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Residues in contact with THR 504 (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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500A HIS 3.9 7.8 + - - -
501A HIS 3.1 21.5 - - - +
502A TYR 3.5 0.5 - - - +
503A ASN* 1.3 79.2 - - - +
505A GLY* 1.3 65.4 + - - +
506A TRP* 3.5 7.1 + - - +
507A VAL* 3.5 17.0 - - + +
508A LEU* 3.4 17.2 + - - +
534A ILE* 5.8 0.7 - - - -
535A GLU* 5.1 1.6 + - - -
29B GLU* 4.4 8.9 + - - +
30B ARG* 3.1 41.3 + - - +
33B ALA* 5.1 4.0 - - - -
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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