Contacts of the helix formed by residues 372 - 376 (chain A) in PDB entry 4XZC
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 ASN 372 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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180A LEU* 3.8 26.1 - - - +
369A PHE* 3.8 5.5 - - - -
371A GLY* 1.3 70.9 - - - -
373A LYS* 1.3 81.0 + - - +
374A LEU* 3.0 25.6 + - - +
375A TYR* 3.0 40.7 + - + +
448A ASP* 3.3 39.3 + - - +
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Residues in contact with LYS 373 (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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366A GLU 5.0 0.4 - - - -
367A ASP* 2.8 53.2 + - - +
369A PHE* 3.8 28.9 + - + +
371A GLY 3.3 5.7 + - - +
372A ASN* 1.3 76.3 + - - +
374A LEU* 1.3 62.6 + - - +
375A TYR 3.1 1.0 + - - -
376A MET* 3.1 33.7 + - + +
385A ARG* 4.6 4.9 + - - -
448A ASP* 4.5 10.6 + - + +
449A ILE* 4.6 17.0 - - + +
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Residues in contact with LEU 374 (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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180A LEU* 3.8 29.2 - - + -
300A ALA 5.0 0.4 - - - +
301A GLN 4.6 7.4 - - - +
302A GLY* 3.3 17.9 - - - +
303A ALA* 2.8 30.8 + - - +
372A ASN* 3.0 22.0 + - - +
373A LYS* 1.3 76.6 - - - +
375A TYR* 1.3 68.3 + - + +
376A MET 3.6 0.9 + - - -
385A ARG* 5.1 0.9 + - - -
448A ASP 3.9 15.0 - - - +
449A ILE* 3.7 30.8 - - + +
454A HIS* 5.7 7.2 - - + -
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Residues in contact with TYR 375 (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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117A VAL* 3.9 28.8 - - + +
118A PRO* 3.1 23.0 - - - +
180A LEU* 3.4 22.7 - - + +
298A LEU* 3.1 47.3 - - + +
299A ARG* 2.9 55.6 + - - -
302A GLY* 4.4 0.9 - - - -
369A PHE* 4.6 2.7 - - - -
372A ASN* 3.0 33.6 + - + +
374A LEU* 1.3 91.5 - - + +
376A MET* 1.3 65.6 + - - +
377A HIS* 4.2 0.2 - - - -
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Residues in contact with MET 376 (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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113A LEU 4.4 1.1 - - - +
298A LEU* 6.0 0.2 - - - -
303A ALA* 3.2 13.3 - - - +
365A ALA* 3.9 16.2 - - + -
366A GLU 5.5 0.4 - - - +
369A PHE* 3.7 47.3 - - + -
372A ASN 4.0 2.2 + - - -
373A LYS* 3.1 37.8 + - + +
375A TYR* 1.3 75.3 - - - +
377A HIS* 1.3 71.0 + - - +
380A VAL* 4.0 11.0 - - + -
382A THR* 3.5 32.8 - - + -
385A ARG* 3.1 33.7 + - - +
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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