Contacts of the strand formed by residues 75 - 81 (chain X) in PDB entry 1IRA
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 GLU 75 (chain X).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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70X VAL 3.5 2.1 - - - +
71X LYS* 3.1 3.2 - - - -
72X SER* 2.9 36.4 + - - +
74X ASP* 1.3 75.2 - - - +
76X THR* 1.3 63.9 + - - +
77X ARG* 3.0 41.4 + - + +
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Residues in contact with THR 76 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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69X CYS* 3.2 33.4 - - - -
70X VAL 3.6 4.3 - - - -
71X LYS* 3.1 31.3 + - + +
74X ASP 3.1 7.3 + - - -
75X GLU* 1.3 75.1 - - - +
77X ARG* 1.3 59.7 + - - +
119X TRP* 3.4 56.8 - - + -
132X SER* 5.3 2.4 + - - -
133X LEU* 3.9 5.8 - - + +
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Residues in contact with ARG 77 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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69X CYS* 3.4 4.0 - - - -
70X VAL* 2.8 56.5 + - + +
72X SER* 3.3 37.4 + - - +
75X GLU* 3.0 43.5 + - + +
76X THR* 1.3 75.8 - - - +
78X LEU* 1.3 68.8 + - - +
79X GLN* 4.3 10.5 - - - +
132X SER* 5.3 4.3 - - - +
133X LEU* 4.0 7.0 - - - -
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Residues in contact with LEU 78 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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30X LEU* 5.5 6.3 - - + -
67X LEU* 4.4 13.9 - - + -
68X SER 3.3 18.4 - - - +
77X ARG* 1.3 81.5 - - - +
79X GLN* 1.3 68.6 + - - +
100X PHE* 4.1 18.6 - - + -
121X LEU* 3.9 32.1 - - + -
131X VAL* 3.4 37.9 - - + +
132X SER* 4.3 7.4 + - - -
133X LEU* 4.1 21.0 - - + +
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Residues in contact with GLN 79 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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66X CYS 3.6 0.2 - - - +
67X LEU* 3.5 4.2 - - - -
68X SER* 2.9 46.8 + - - +
70X VAL* 3.1 33.7 - - + +
77X ARG* 4.3 10.7 - - - +
78X LEU* 1.3 80.7 - - - +
80X LEU* 1.3 63.4 + - - +
81X GLU* 3.3 26.9 - - + +
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Residues in contact with LEU 80 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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25X LEU* 3.8 21.5 - - + -
28X ASN* 4.3 18.8 + - - +
29X GLN* 5.1 0.2 - - - -
30X LEU* 4.4 17.9 - - + +
60X ILE* 3.7 32.5 - - + -
65X MET* 4.6 21.3 - - + -
66X CYS 3.5 6.3 - - - +
67X LEU* 3.6 35.0 - - + -
79X GLN* 1.3 79.1 - - - +
81X GLU* 1.3 64.1 + - - +
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Residues in contact with GLU 81 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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65X MET* 3.0 9.4 - - - -
66X CYS 2.8 30.1 + - - -
68X SER* 2.7 24.5 + - - +
70X VAL* 4.2 2.9 - - - +
79X GLN* 3.3 25.2 - - - +
80X LEU* 1.3 76.5 - - - +
82X ALA* 1.3 60.5 + - - +
83X VAL* 3.1 9.5 + - + +
97X ARG* 3.0 36.8 + - - -
98X PHE* 3.2 22.8 - - + -
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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