Contacts of the strand formed by residues 536 - 540 (chain A) in PDB entry 1SIW
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 536 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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248A TYR* 3.4 8.2 - - - +
525A PHE* 3.0 46.5 + - - -
528A ASN* 3.0 21.7 + - - +
529A ALA* 3.4 4.3 + - - -
534A GLY 3.0 2.4 + - - -
535A ARG* 1.3 75.0 - - - +
537A MET* 1.3 61.5 + - - +
561A LEU* 3.7 1.0 - - - +
566A CYS* 3.4 21.6 - - - +
572A GLY* 3.1 1.5 - - - -
573A GLY 3.0 19.2 + - - -
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Residues in contact with MET 537 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
238A PRO* 4.0 11.4 - - + -
242A ASP* 3.9 22.7 - - - +
243A TRP* 3.6 33.4 - - + -
246A SER* 3.7 11.9 - - - +
248A TYR 2.8 8.9 + - - +
249A ILE* 3.3 8.8 - - + +
250A ILE 3.0 22.3 + - - -
525A PHE* 3.9 3.4 - - - -
536A SER* 1.3 77.0 - - - +
538A ILE* 1.3 77.4 + - - +
539A ILE* 4.2 6.3 - - + -
561A LEU* 4.3 0.9 - - - -
571A GLY* 3.7 26.2 - - - +
572A GLY 3.8 9.9 - - - +
573A GLY 3.3 14.6 - - - +
575A ALA* 4.2 11.0 - - + -
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Residues in contact with ILE 538 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
250A ILE* 3.3 15.7 - - + +
252A TRP* 4.1 13.7 - - + -
525A PHE* 3.9 24.2 - - + -
537A MET* 1.3 79.9 - - - +
539A ILE* 1.3 71.5 + - - +
540A VAL* 3.7 3.9 + - + +
557A LEU* 3.6 54.5 - - + +
560A MET* 4.4 17.5 - - + -
561A LEU* 4.2 13.2 - - + -
573A GLY 3.0 7.9 + - - +
574A TRP* 3.9 1.9 - - + -
575A ALA 2.9 25.3 + - - +
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Residues in contact with ILE 539 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
243A TRP* 3.9 35.4 - - + +
249A ILE* 3.8 24.5 - - + -
250A ILE 2.9 8.3 + - - +
251A ALA* 3.5 5.6 - - + -
252A TRP* 2.8 26.5 + - - +
254A SER* 3.6 22.9 - - - +
256A VAL* 4.2 9.9 - - + -
267A PHE* 4.0 17.3 - - + -
537A MET* 4.4 4.5 - - - -
538A ILE* 1.3 73.8 - - - +
540A VAL* 1.3 60.4 + - - +
575A ALA* 3.2 16.4 - - + -
577A TYR* 3.9 22.9 - - + -
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Residues in contact with VAL 540 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
252A TRP 3.3 12.1 - - - +
254A SER* 3.9 4.7 + - - -
538A ILE 4.5 2.7 - - - +
539A ILE* 1.3 76.0 - - - +
541A GLY* 1.3 65.5 + - - +
544A LEU* 3.8 16.8 - - + -
554A TYR* 3.4 34.4 + - + +
557A LEU* 3.9 16.4 - - + -
574A TRP* 3.8 31.2 - - + +
575A ALA 2.8 16.0 + - - +
576A HIS* 3.6 4.4 + - - -
577A TYR* 3.4 22.2 + - - +
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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