Contacts of the strand formed by residues 172 - 176 (chain B) in PDB entry 1IVS
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 LEU 172 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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171B ARG* 1.3 74.6 + - - +
173B VAL* 1.3 67.5 + - - +
174B ASN* 5.7 0.3 + - - -
273B PRO 4.0 5.4 - - - +
274B ALA 5.4 2.0 - - - +
275B HIS 5.0 0.4 - - - -
276B ASP 3.9 6.7 - - - +
277B PRO* 3.7 31.6 - - + -
280B TYR* 3.3 43.4 + - + -
353B TYR* 3.7 19.3 - - + -
354B ALA 3.0 48.0 - - - +
355B ILE* 3.8 9.0 - - + -
360B TRP* 3.4 17.7 - - - -
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Residues in contact with VAL 173 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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171B ARG 3.7 6.7 - - - +
172B LEU* 1.3 83.4 - - - +
174B ASN* 1.3 65.9 + - - +
175B TRP* 3.1 11.2 + - + +
182B THR* 3.6 27.8 - - + -
353B TYR* 3.8 3.4 - - - -
354B ALA* 2.8 37.4 + - + +
356B PHE* 4.0 17.9 - - + -
358B GLN* 4.0 17.9 - - + -
360B TRP* 3.4 27.4 - - + -
401B ASN* 4.1 6.7 - - - +
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Residues in contact with ASN 174 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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172B LEU 5.7 0.4 + - - -
173B VAL* 1.3 69.4 - - - +
175B TRP* 1.3 60.3 + - - +
182B THR* 3.3 4.0 - - - -
183B LEU* 2.8 58.9 + - + +
184B SER* 4.4 0.2 - - - +
185B ASP* 3.0 34.7 + - - +
188B VAL* 4.6 12.4 - - + +
351B ILE* 4.1 14.3 - - + +
352B GLU 4.2 5.2 - - - -
353B TYR* 3.8 26.0 + - - -
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Residues in contact with TRP 175 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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173B VAL* 3.1 16.3 + - + +
174B ASN* 1.3 73.7 - - - +
176B CYS* 1.3 62.3 + - - +
177B PRO* 3.1 26.2 - - + +
180B GLU* 3.3 35.9 - - + -
181B THR* 3.2 31.9 - - - -
182B THR* 4.0 4.7 - - + +
183B LEU* 5.4 0.2 - - - -
296B LEU* 3.1 59.5 + - + -
351B ILE* 3.5 5.8 - - - +
352B GLU* 2.9 51.3 + - + +
354B ALA* 5.0 3.4 - - + -
356B PHE* 4.2 23.3 - + - -
405B GLN* 4.0 11.7 - - + -
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Residues in contact with CYS 176 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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174B ASN 4.2 0.2 + - - -
175B TRP* 1.3 75.5 - - - +
177B PRO* 1.3 55.3 - - - +
178B ARG* 3.1 12.2 + - - -
179B CYS* 3.4 6.5 + - + +
180B GLU* 2.9 34.1 + - - -
181B THR* 3.2 19.6 + - + +
183B LEU* 4.1 10.7 - - + +
344B CYS* 3.6 24.7 - - + -
347B CYS* 3.2 35.7 - - - -
349B THR* 4.3 6.5 - - - -
350B PRO 5.8 0.2 - - - -
351B ILE* 4.7 3.6 - - + -
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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