Contacts of the helix formed by residues 330 - 334 (chain A) in PDB entry 3Q7I
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 ASP 330 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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328A PRO 3.1 5.4 + - - +
329A TYR* 1.3 78.8 - - - +
331A GLU* 1.3 66.8 + - - +
332A ARG* 2.8 67.4 + - - +
333A LEU* 3.0 32.1 + - + +
371A VAL* 4.0 8.7 - - - +
372A GLY 3.9 1.8 + - - -
397A ILE* 3.9 25.0 - - + +
400A SER* 4.6 6.4 + - - -
408A GLN* 5.3 0.7 + - - +
411A LEU* 4.9 9.9 - - - +
468A LEU* 4.6 2.5 - - - -
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Residues in contact with GLU 331 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
157A ARG* 4.2 15.8 + - - +
330A ASP* 1.3 74.4 + - - +
332A ARG* 1.3 63.4 + - + +
333A LEU 3.2 0.9 + - - -
334A CYS* 3.2 26.9 + - - +
371A VAL* 3.6 23.1 - - + +
372A GLY 5.2 0.4 + - - +
374A ASN* 3.9 14.6 + - - +
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Residues in contact with ARG 332 (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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154A MET* 4.6 1.0 - - - +
157A ARG* 3.7 33.7 - - - +
158A ALA* 3.1 46.2 + - - +
161A PRO* 3.9 24.8 - - + +
162A TYR* 5.1 1.8 + - - -
330A ASP* 2.8 38.8 + - - +
331A GLU* 1.3 78.1 - - + +
333A LEU* 1.3 57.2 + - - +
334A CYS 3.2 4.2 + - - -
335A TYR 4.9 0.9 + - - -
397A ILE* 4.1 5.9 - - - +
399A THR 4.4 0.8 + - - -
400A SER* 3.9 22.4 + - - +
401A HIS* 3.7 33.0 - - - +
468A LEU* 3.7 42.2 + - + +
603A MES 6.0 0.2 - - - +
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Residues in contact with LEU 333 (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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154A MET* 5.2 1.3 - - - -
158A ALA* 4.3 7.9 - - + -
328A PRO* 3.7 28.8 - - + +
330A ASP* 3.0 22.4 + - + +
332A ARG* 1.3 76.7 - - - +
334A CYS* 1.3 61.5 + - - +
335A TYR 3.2 3.1 - - - -
336A PHE* 3.0 44.5 + - + +
337A VAL* 4.4 1.2 + - - +
371A VAL* 4.2 6.7 - - - +
395A ILE* 4.2 21.1 - - + +
397A ILE* 4.4 15.7 - - + -
468A LEU* 4.0 22.7 - - + -
473A LEU* 4.1 17.3 - - + -
476A LEU* 4.6 4.9 - - + -
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Residues in contact with CYS 334 (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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157A ARG* 3.7 30.5 - - - -
331A GLU* 3.2 20.6 + - - +
332A ARG 3.2 0.8 - - - -
333A LEU* 1.3 76.4 - - - +
335A TYR* 1.4 75.9 + - - +
336A PHE 4.0 0.2 + - - -
337A VAL* 5.1 2.9 + - - +
338A ASP* 4.9 5.4 + - - +
371A VAL* 3.9 17.5 - - + +
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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