Contacts of the strand formed by residues 132 - 135 (chain B) in PDB entry 4IBU
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 132 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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126B TYR* 3.6 5.7 - - - -
127B SER* 2.8 34.4 + - - -
130B LEU* 3.7 21.5 - - + +
131B ASN* 1.3 78.0 - - - +
133B MET* 1.3 64.2 + - - +
134B PHE* 3.5 19.7 - - + -
250B PRO* 4.8 7.1 - - - +
271B GLU* 2.8 49.2 + - + +
272B VAL 4.2 1.1 - - - -
273B CYS* 3.6 29.3 - - - +
285B GLU* 2.8 37.8 + - - +
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Residues in contact with MET 133 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
113B PHE* 4.1 16.2 - - + -
124B CYS* 4.0 17.9 - - - -
125B THR 3.5 5.6 - - - +
126B TYR* 4.2 8.7 - - + +
132B LYS* 1.3 73.0 - - - +
134B PHE* 1.3 67.3 + - - +
135B CYS* 4.4 3.8 - - + -
141B CYS* 3.6 37.5 - - + -
142B PRO 4.2 5.6 - - - +
143B VAL* 4.0 16.6 - - + -
236B TYR* 4.1 10.5 - - - -
270B PHE* 3.9 29.6 - - + -
271B GLU 2.7 14.5 + - - +
272B VAL* 3.2 5.6 - - + +
273B CYS 2.8 26.2 + - - +
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Residues in contact with PHE 134 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
124B CYS* 3.4 1.2 - - - -
125B THR* 2.7 41.9 + - + +
127B SER* 4.3 0.4 - - - -
130B LEU* 4.0 11.9 - - + -
132B LYS* 3.5 39.9 - - + -
133B MET* 1.3 73.0 - - - +
135B CYS* 1.3 62.1 + - - +
273B CYS* 3.3 20.9 - - + +
275B CYS* 4.5 1.1 - - - -
278B PRO* 3.5 26.5 - - + +
281B ASP* 3.7 13.5 - - + -
282B ARG* 3.6 45.1 - - + -
285B GLU* 3.5 38.1 - - - -
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Residues in contact with CYS 135 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
123B THR 3.4 11.0 - - - +
124B CYS* 4.0 5.4 - - - -
133B MET* 4.4 2.7 - - + -
134B PHE* 1.3 76.3 - - - +
136B GLN* 1.3 60.7 + - - +
141B CYS* 3.5 34.3 - - - -
236B TYR* 3.8 18.8 - - - -
272B VAL* 4.2 7.6 - - - -
273B CYS 2.9 9.3 + - - -
274B VAL* 3.1 22.0 - - - -
275B CYS* 2.8 30.3 + - - -
278B PRO* 3.8 9.7 - - - +
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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
------------------------------------------------------------
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